Sigma rules for NoName057(16)
93 rules · scoped to actor · back to NoName057(16)
Direct rules mention this entity in their title or description. Related rules cover the techniques this entity is known to use.
title: HackTool - BabyShark Agent Default URL Pattern
id: 304810ed-8853-437f-9e36-c4975c3dfd7e
status: test
description: Detects Baby Shark C2 Framework default communication patterns
references:
- https://nasbench.medium.com/understanding-detecting-c2-frameworks-babyshark-641be4595845
author: Florian Roth (Nextron Systems)
date: 2021-06-09
modified: 2024-02-15
tags:
- attack.command-and-control
- attack.t1071.001
logsource:
category: proxy
detection:
selection:
c-uri|contains: 'momyshark\?key='
condition: selection
falsepositives:
- Unlikely
level: critical
title: PwnDrp Access
id: 2b1ee7e4-89b6-4739-b7bb-b811b6607e5e
status: test
description: Detects downloads from PwnDrp web servers developed for red team testing and most likely also used for criminal activity
references:
- https://breakdev.org/pwndrop/
author: Florian Roth (Nextron Systems)
date: 2020-04-15
modified: 2021-11-27
tags:
- attack.command-and-control
- attack.t1071.001
- attack.t1102.001
- attack.t1102.003
logsource:
category: proxy
detection:
selection:
c-uri|contains: '/pwndrop/'
condition: selection
falsepositives:
- Unknown
level: critical
title: Audit CVE Event
id: 48d91a3a-2363-43ba-a456-ca71ac3da5c2
status: test
description: |
Detects events generated by user-mode applications when they call the CveEventWrite API when a known vulnerability is trying to be exploited.
MS started using this log in Jan. 2020 with CVE-2020-0601 (a Windows CryptoAPI vulnerability.
Unfortunately, that is about the only instance of CVEs being written to this log.
references:
- https://twitter.com/VM_vivisector/status/1217190929330655232
- https://twitter.com/DidierStevens/status/1217533958096924676
- https://twitter.com/FlemmingRiis/status/1217147415482060800
- https://www.youtube.com/watch?v=ebmW42YYveI # "CVEs in Windows Event Logs? What You Need to Know" by 13Cubed.
- https://nullsec.us/windows-event-log-audit-cve/
author: Florian Roth (Nextron Systems), Zach Mathis
date: 2020-01-15
modified: 2022-10-22
tags:
- attack.execution
- attack.stealth
- attack.t1203
- attack.privilege-escalation
- attack.t1068
- attack.t1211
- attack.credential-access
- attack.t1212
- attack.lateral-movement
- attack.t1210
- attack.impact
- attack.t1499.004
logsource:
product: windows
service: application
detection:
selection:
Provider_Name:
- 'Microsoft-Windows-Audit-CVE'
- 'Audit-CVE'
EventID: 1
condition: selection
falsepositives:
- Unknown
level: critical
title: HackTool - PurpleSharp Execution
id: ff23ffbc-3378-435e-992f-0624dcf93ab4
status: test
description: Detects the execution of the PurpleSharp adversary simulation tool
references:
- https://github.com/mvelazc0/PurpleSharp
author: Florian Roth (Nextron Systems)
date: 2021-06-18
modified: 2023-02-05
tags:
- attack.t1587
- attack.resource-development
logsource:
category: process_creation
product: windows
detection:
selection_img:
- Image|contains: '\purplesharp'
- OriginalFileName: 'PurpleSharp.exe'
selection_cli:
CommandLine|contains:
- 'xyz123456.exe'
- 'PurpleSharp'
condition: 1 of selection_*
falsepositives:
- Unlikely
level: critical
title: ProxyLogon MSExchange OabVirtualDirectory
id: 550d3350-bb8a-4ff3-9533-2ba533f4a1c0
status: test
description: Detects specific patterns found after a successful ProxyLogon exploitation in relation to a Commandlet invocation of Set-OabVirtualDirectory
references:
- https://bi-zone.medium.com/hunting-down-ms-exchange-attacks-part-1-proxylogon-cve-2021-26855-26858-27065-26857-6e885c5f197c
author: Florian Roth (Nextron Systems)
date: 2021-08-09
modified: 2023-01-23
tags:
- attack.t1587.001
- attack.resource-development
logsource:
product: windows
service: msexchange-management
detection:
keywords_cmdlet:
'|all':
- 'OabVirtualDirectory'
- ' -ExternalUrl '
keywords_params:
- 'eval(request'
- 'http://f/<script'
- '"unsafe"};'
- 'function Page_Load()'
condition: keywords_cmdlet and keywords_params
falsepositives:
- Unlikely
level: critical
title: Hacktool Execution - Imphash
id: 24e3e58a-646b-4b50-adef-02ef935b9fc8
status: test
description: Detects the execution of different Windows based hacktools via their import hash (imphash) even if the files have been renamed
references:
- Internal Research
author: Florian Roth (Nextron Systems)
date: 2022-03-04
modified: 2024-11-23
tags:
- attack.credential-access
- attack.resource-development
- attack.t1588.002
- attack.t1003
logsource:
category: process_creation
product: windows
detection:
selection:
Hashes|contains: # Sysmon field hashes contains all types
- IMPHASH=BCCA3C247B619DCD13C8CDFF5F123932 # PetitPotam
- IMPHASH=3A19059BD7688CB88E70005F18EFC439 # PetitPotam
- IMPHASH=bf6223a49e45d99094406777eb6004ba # PetitPotam
- IMPHASH=23867A89C2B8FC733BE6CF5EF902F2D1 # JuicyPotato
- IMPHASH=A37FF327F8D48E8A4D2F757E1B6E70BC # JuicyPotato
- IMPHASH=F9A28C458284584A93B14216308D31BD # JuicyPotatoNG
- IMPHASH=6118619783FC175BC7EBECFF0769B46E # RoguePotato
- IMPHASH=959A83047E80AB68B368FDB3F4C6E4EA # RoguePotato
- IMPHASH=563233BFA169ACC7892451F71AD5850A # RoguePotato
- IMPHASH=87575CB7A0E0700EB37F2E3668671A08 # RoguePotato
- IMPHASH=13F08707F759AF6003837A150A371BA1 # Pwdump
- IMPHASH=1781F06048A7E58B323F0B9259BE798B # Pwdump
- IMPHASH=233F85F2D4BC9D6521A6CAAE11A1E7F5 # Pwdump
- IMPHASH=24AF2584CBF4D60BBE5C6D1B31B3BE6D # Pwdump
- IMPHASH=632969DDF6DBF4E0F53424B75E4B91F2 # Pwdump
- IMPHASH=713C29B396B907ED71A72482759ED757 # Pwdump
- IMPHASH=749A7BB1F0B4C4455949C0B2BF7F9E9F # Pwdump
- IMPHASH=8628B2608957A6B0C6330AC3DE28CE2E # Pwdump
- IMPHASH=8B114550386E31895DFAB371E741123D # Pwdump
- IMPHASH=94CB940A1A6B65BED4D5A8F849CE9793 # PwDumpX
- IMPHASH=9D68781980370E00E0BD939EE5E6C141 # Pwdump
- IMPHASH=B18A1401FF8F444056D29450FBC0A6CE # Pwdump
- IMPHASH=CB567F9498452721D77A451374955F5F # Pwdump
- IMPHASH=730073214094CD328547BF1F72289752 # Htran
- IMPHASH=17B461A082950FC6332228572138B80C # Cobalt Strike beacons
- IMPHASH=DC25EE78E2EF4D36FAA0BADF1E7461C9 # Cobalt Strike beacons
- IMPHASH=819B19D53CA6736448F9325A85736792 # Cobalt Strike beacons
- IMPHASH=829DA329CE140D873B4A8BDE2CBFAA7E # Cobalt Strike beacons
- IMPHASH=C547F2E66061A8DFFB6F5A3FF63C0A74 # PPLDump
- IMPHASH=0588081AB0E63BA785938467E1B10CCA # PPLDump
- IMPHASH=0D9EC08BAC6C07D9987DFD0F1506587C # NanoDump
- IMPHASH=BC129092B71C89B4D4C8CDF8EA590B29 # NanoDump
- IMPHASH=4DA924CF622D039D58BCE71CDF05D242 # NanoDump
- IMPHASH=E7A3A5C377E2D29324093377D7DB1C66 # NanoDump
- IMPHASH=9A9DBEC5C62F0380B4FA5FD31DEFFEDF # NanoDump
- IMPHASH=AF8A3976AD71E5D5FDFB67DDB8DADFCE # NanoDump
- IMPHASH=0C477898BBF137BBD6F2A54E3B805FF4 # NanoDump
- IMPHASH=0CA9F02B537BCEA20D4EA5EB1A9FE338 # NanoDump
- IMPHASH=3AB3655E5A14D4EEFC547F4781BF7F9E # NanoDump
- IMPHASH=E6F9D5152DA699934B30DAAB206471F6 # NanoDump
- IMPHASH=3AD59991CCF1D67339B319B15A41B35D # NanoDump
- IMPHASH=FFDD59E0318B85A3E480874D9796D872 # NanoDump
- IMPHASH=0CF479628D7CC1EA25EC7998A92F5051 # NanoDump
- IMPHASH=07A2D4DCBD6CB2C6A45E6B101F0B6D51 # NanoDump
- IMPHASH=D6D0F80386E1380D05CB78E871BC72B1 # NanoDump
- IMPHASH=38D9E015591BBFD4929E0D0F47FA0055 # HandleKatz
- IMPHASH=0E2216679CA6E1094D63322E3412D650 # HandleKatz
- IMPHASH=ADA161BF41B8E5E9132858CB54CAB5FB # DripLoader
- IMPHASH=2A1BC4913CD5ECB0434DF07CB675B798 # DripLoader
- IMPHASH=11083E75553BAAE21DC89CE8F9A195E4 # DripLoader
- IMPHASH=A23D29C9E566F2FA8FFBB79267F5DF80 # DripLoader
- IMPHASH=4A07F944A83E8A7C2525EFA35DD30E2F # CreateMiniDump
- IMPHASH=767637C23BB42CD5D7397CF58B0BE688 # UACMe Akagi
- IMPHASH=14C4E4C72BA075E9069EE67F39188AD8 # UACMe Akagi
- IMPHASH=3C782813D4AFCE07BBFC5A9772ACDBDC # UACMe Akagi
- IMPHASH=7D010C6BB6A3726F327F7E239166D127 # UACMe Akagi
- IMPHASH=89159BA4DD04E4CE5559F132A9964EB3 # UACMe Akagi
- IMPHASH=6F33F4A5FC42B8CEC7314947BD13F30F # UACMe Akagi
- IMPHASH=5834ED4291BDEB928270428EBBAF7604 # UACMe Akagi
- IMPHASH=5A8A8A43F25485E7EE1B201EDCBC7A38 # UACMe Akagi
- IMPHASH=DC7D30B90B2D8ABF664FBED2B1B59894 # UACMe Akagi
- IMPHASH=41923EA1F824FE63EA5BEB84DB7A3E74 # UACMe Akagi
- IMPHASH=3DE09703C8E79ED2CA3F01074719906B # UACMe Akagi
- IMPHASH=A53A02B997935FD8EEDCB5F7ABAB9B9F # WCE
- IMPHASH=E96A73C7BF33A464C510EDE582318BF2 # WCE
- IMPHASH=32089B8851BBF8BC2D014E9F37288C83 # Sliver Stagers
- IMPHASH=09D278F9DE118EF09163C6140255C690 # Dumpert
- IMPHASH=03866661686829d806989e2fc5a72606 # Dumpert
- IMPHASH=e57401fbdadcd4571ff385ab82bd5d6d # Dumpert
- IMPHASH=84B763C45C0E4A3E7CA5548C710DB4EE # SysmonEnte
- IMPHASH=19584675D94829987952432E018D5056 # SysmonQuiet
- IMPHASH=330768A4F172E10ACB6287B87289D83B # ShaprEvtMute Hook
- IMPHASH=885C99CCFBE77D1CBFCB9C4E7C1A3313 # Forkatz
- IMPHASH=22A22BC9E4E0D2F189F1EA01748816AC # PPLKiller
- IMPHASH=7FA30E6BB7E8E8A69155636E50BF1B28 # PPLKiller
- IMPHASH=96DF3A3731912449521F6F8D183279B1 # Backstab
- IMPHASH=7E6CF3FF4576581271AC8A313B2AAB46 # Backstab
- IMPHASH=51791678F351C03A0EB4E2A7B05C6E17 # Backstab
- IMPHASH=25CE42B079282632708FC846129E98A5 # Forensia
- IMPHASH=021BCCA20BA3381B11BDDE26B4E62F20 # EDRSandBlast
- IMPHASH=59223B5F52D8799D38E0754855CBDF42 # EDRSandBlast
- IMPHASH=81E75D8F1D276C156653D3D8813E4A43 # EDRSandBlast
- IMPHASH=17244E8B6B8227E57FE709CCAD421420 # EDRSandBlast
- IMPHASH=5B76DA3ACDEDC8A5CDF23A798B5936B4 # EDRSandBlast
- IMPHASH=CB2B65BB77D995CC1C0E5DF1C860133C # EDRSandBlast
- IMPHASH=40445337761D80CF465136FAFB1F63E6 # EDRSandBlast
- IMPHASH=8A790F401B29FA87BC1E56F7272B3AA6 # EDRSilencer
- IMPHASH=B50199E952C875241B9CE06C971CE3C1 # EventLogCrasher
condition: selection
falsepositives:
- Legitimate use of one of these tools
level: critical
title: HackTool - SILENTTRINITY Stager Execution
id: 03552375-cc2c-4883-bbe4-7958d5a980be
related:
- id: 75c505b1-711d-4f68-a357-8c3fe37dbf2d # DLL Load
type: derived
status: test
description: Detects SILENTTRINITY stager use via PE metadata
references:
- https://github.com/byt3bl33d3r/SILENTTRINITY
author: Aleksey Potapov, oscd.community
date: 2019-10-22
modified: 2023-02-13
tags:
- attack.command-and-control
- attack.t1071
logsource:
category: process_creation
product: windows
detection:
selection:
Description|contains: 'st2stager'
condition: selection
falsepositives:
- Unlikely
level: high
title: HackTool - SILENTTRINITY Stager DLL Load
id: 75c505b1-711d-4f68-a357-8c3fe37dbf2d
related:
- id: 03552375-cc2c-4883-bbe4-7958d5a980be # Process Creation
type: derived
status: test
description: Detects SILENTTRINITY stager dll loading activity
references:
- https://github.com/byt3bl33d3r/SILENTTRINITY
author: Aleksey Potapov, oscd.community
date: 2019-10-22
modified: 2023-02-17
tags:
- attack.command-and-control
- attack.t1071
logsource:
category: image_load
product: windows
detection:
selection:
Description|contains: 'st2stager'
condition: selection
falsepositives:
- Unlikely
level: high
title: Wannacry Killswitch Domain
id: 3eaf6218-3bed-4d8a-8707-274096f12a18
status: test
description: Detects wannacry killswitch domain dns queries
references:
- https://www.mandiant.com/resources/blog/wannacry-ransomware-campaign
author: Mike Wade
date: 2020-09-16
modified: 2022-03-24
tags:
- attack.command-and-control
- attack.t1071.001
logsource:
category: dns
detection:
selection:
query:
- 'ifferfsodp9ifjaposdfjhgosurijfaewrwergwea.testing'
- 'ifferfsodp9ifjaposdfjhgosurijfaewrwergwea.test'
- 'ifferfsodp9ifjaposdfjhgosurijfaewrwergwea.com'
- 'ayylmaotjhsstasdfasdfasdfasdfasdfasdfasdf.com'
- 'iuqssfsodp9ifjaposdfjhgosurijfaewrwergwea.com'
condition: selection
falsepositives:
- Analyst testing
level: high
title: Outbound Network Connection Initiated By Microsoft Dialer
id: 37e4024a-6c80-4d8f-b95d-2e7e94f3a8d1
status: test
description: |
Detects outbound network connection initiated by Microsoft Dialer.
The Microsoft Dialer, also known as Phone Dialer, is a built-in utility application included in various versions of the Microsoft Windows operating system. Its primary function is to provide users with a graphical interface for managing phone calls via a modem or a phone line connected to the computer.
This is an outdated process in the current conext of it's usage and is a common target for info stealers for process injection, and is used to make C2 connections, common example is "Rhadamanthys"
references:
- https://tria.ge/240301-rk34sagf5x/behavioral2
- https://app.any.run/tasks/6720b85b-9c53-4a12-b1dc-73052a78477d
- https://research.checkpoint.com/2023/rhadamanthys-v0-5-0-a-deep-dive-into-the-stealers-components/
- https://strontic.github.io/xcyclopedia/library/dialer.exe-0B69655F912619756C704A0BF716B61F.html
author: CertainlyP
date: 2024-04-26
tags:
- attack.execution
- attack.command-and-control
- attack.t1071.001
logsource:
category: network_connection
product: windows
detection:
selection:
Image|endswith: ':\Windows\System32\dialer.exe'
Initiated: 'true'
filter_main_local_ranges:
DestinationIp|cidr:
- '127.0.0.0/8'
- '10.0.0.0/8'
- '172.16.0.0/12'
- '192.168.0.0/16'
- '169.254.0.0/16'
- '::1/128' # IPv6 loopback
- 'fe80::/10' # IPv6 link-local addresses
- 'fc00::/7' # IPv6 private addresses
condition: selection and not 1 of filter_main_*
falsepositives:
- In Modern Windows systems, unable to see legitimate usage of this process, However, if an organization has legitimate purpose for this there can be false positives.
level: high
title: Renamed Visual Studio Code Tunnel Execution
id: 2cf29f11-e356-4f61-98c0-1bdb9393d6da
status: test
description: Detects renamed Visual Studio Code tunnel execution. Attackers can abuse this functionality to establish a C2 channel
references:
- https://ipfyx.fr/post/visual-studio-code-tunnel/
- https://badoption.eu/blog/2023/01/31/code_c2.html
- https://code.visualstudio.com/docs/remote/tunnels
author: Nasreddine Bencherchali (Nextron Systems)
date: 2023-09-28
modified: 2025-10-29
tags:
- attack.command-and-control
- attack.t1071.001
- attack.t1219
logsource:
category: process_creation
product: windows
detection:
selection_image_only_tunnel:
OriginalFileName: null
CommandLine|endswith: '.exe tunnel'
selection_image_tunnel_args:
CommandLine|contains|all:
- '.exe tunnel'
- '--accept-server-license-terms'
selection_image_tunnel_service:
CommandLine|contains|all:
- 'tunnel '
- 'service'
- 'internal-run'
- 'tunnel-service.log'
selection_parent_tunnel:
ParentCommandLine|endswith: ' tunnel'
Image|endswith: '\cmd.exe'
CommandLine|contains|all:
- '/d /c '
- '\servers\Stable-'
- 'code-server.cmd'
filter_main_parent_code:
ParentImage|endswith:
- '\code-tunnel.exe'
- '\code.exe'
filter_main_image_code:
Image|endswith:
- '\code-tunnel.exe'
- '\code.exe'
condition: (1 of selection_image_* and not 1 of filter_main_image_*) or (selection_parent_tunnel and not 1 of filter_main_parent_*)
falsepositives:
- Unknown
level: high
title: Bitsadmin to Uncommon TLD
id: 9eb68894-7476-4cd6-8752-23b51f5883a7
status: test
description: Detects Bitsadmin connections to domains with uncommon TLDs
references:
- https://twitter.com/jhencinski/status/1102695118455349248
- https://isc.sans.edu/forums/diary/Investigating+Microsoft+BITS+Activity/23281/
author: Florian Roth (Nextron Systems), Tim Shelton
date: 2019-03-07
modified: 2023-05-17
tags:
- attack.command-and-control
- attack.execution
- attack.stealth
- attack.t1071.001
- attack.persistence
- attack.t1197
- attack.s0190
logsource:
category: proxy
detection:
selection:
c-useragent|startswith: 'Microsoft BITS/'
falsepositives:
cs-host|endswith:
- '.com'
- '.net'
- '.org'
- '.scdn.co' # spotify streaming
- '.sfx.ms' # Microsoft domain, example request: https://oneclient.sfx.ms/PreSignInSettings/Prod/2022-08-15-21-xx-xx/PreSignInSettingsConfig.json
condition: selection and not falsepositives
falsepositives:
- Rare programs that use Bitsadmin and update from regional TLDs e.g. .uk or .ca
level: high
title: Raw Paste Service Access
id: 5468045b-4fcc-4d1a-973c-c9c9578edacb
status: test
description: Detects direct access to raw pastes in different paste services often used by malware in their second stages to download malicious code in encrypted or encoded form
references:
- https://www.virustotal.com/gui/domain/paste.ee/relations
author: Florian Roth (Nextron Systems)
date: 2019-12-05
modified: 2023-01-19
tags:
- attack.command-and-control
- attack.t1071.001
- attack.t1102.001
- attack.t1102.003
logsource:
category: proxy
detection:
selection:
c-uri|contains:
- '.paste.ee/r/'
- '.pastebin.com/raw/'
- '.hastebin.com/raw/'
- '.ghostbin.co/paste/*/raw/'
- 'pastetext.net/'
- 'pastebin.pl/'
- 'paste.ee/'
condition: selection
falsepositives:
- User activity (e.g. developer that shared and copied code snippets and used the raw link instead of just copy & paste)
level: high
title: Malware User Agent
id: 5c84856b-55a5-45f1-826f-13f37250cf4e
status: test
description: Detects suspicious user agent strings used by malware in proxy logs
references:
- http://rules.emergingthreats.net/open/snort-2.9.0/rules/emerging-user_agents.rules
- http://www.botopedia.org/search?searchword=scan&searchphrase=all
- https://networkraptor.blogspot.com/2015/01/user-agent-strings.html
- https://perishablepress.com/blacklist/ua-2013.txt
- https://www.bluecoat.com/en-gb/security-blog/2015-05-05/know-your-agents
- https://twitter.com/kladblokje_88/status/1614673320124743681?s=12&t=joEpeVa5d58aHYNGA_To7Q
- https://pbs.twimg.com/media/FtYbfsDXoAQ1Y8M?format=jpg&name=large
- https://twitter.com/crep1x/status/1635034100213112833
author: Florian Roth (Nextron Systems), X__Junior (Nextron Systems), Nasreddine Bencherchali (Nextron Systems)
date: 2017-07-08
modified: 2024-04-14
tags:
- attack.command-and-control
- attack.t1071.001
logsource:
category: proxy
detection:
selection:
c-useragent:
# RATs
- 'Mozilla/5.0 (Windows NT 6.1; WOW64; rv:53.0) Gecko/20100101 Chrome /53.0' # DragonOK
- 'Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 5.1)' # Used by PlugX - base-lining recommended - https://community.rsa.com/thread/185439
- 'Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 5.1; Trident/4.0)' # Used by PlugX - base-lining recommended - https://community.rsa.com/thread/185439
- 'Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.0; .NET CLR 1.1.4322)' # Used by PlugX - old - https://unit42.paloaltonetworks.com/unit-42-identifies-new-dragonok-backdoor-malware-deployed-against-japanese-targets/
- 'HttpBrowser/1.0' # HTTPBrowser RAT
- '*<|>*' # Houdini / Iniduoh / njRAT
- 'nsis_inetc (mozilla)' # ZeroAccess
- 'Wget/1.9+cvs-stable (Red Hat modified)' # Dyre / Upatre
# Ghost419 https://www.mcafee.com/blogs/other-blogs/mcafee-labs/gold-dragon-widens-olympics-malware-attacks-gains-permanent-presence-on-victims-systems/
- 'Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 6.1; Trident/4.0; .NET CLR 1.1.4322)'
# Malware
- '*zeroup*' # W32/Renos.Downloader
- 'Mozilla/5.0 (Windows NT 5.1 ; v.*' # Kazy
- '* adlib/*'
- '* tiny' # Trojan Downloader
- '* BGroom *' # Trojan Downloader
- '* changhuatong'
- '* CholTBAgent'
- 'Mozilla/5.0 WinInet'
- 'RookIE/1.0'
- 'M' # HkMain
- 'Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 5.1; Trident/4.0)' # Egamipload - old UA - probable prone to false positives
- 'Mozilla/4.0 (compatible;MSIE 7.0;Windows NT 6.0)' # Yakes
- 'backdoorbot'
- 'Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.2.3) Gecko/20100401 Firefox/3.6.1 (.NET CLR 3.5.30731)' # Sality
- 'Opera/8.81 (Windows NT 6.0; U; en)' # Sality
- 'Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.2.3) Gecko/20100401 Firefox/3.6.1 (.NET CLR 3.5.30729)' # Sality
- 'Opera' # Trojan Keragany
- 'Mozilla/4.0 (compatible; MSIE 5.0; Windows 98)' # Fareit
- 'Mozilla/4.0 (compatible; MSIE 5.01; Windows NT 5.0)' # Webshell's back connect
- 'MSIE' # Toby web shell
- '*(Charon; Inferno)' # Loki Bot
- 'Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 5.1; Trident/5.0)' # Fareit / Pony
- 'Mozilla/4.0 (compatible; MSIE 6.1; Windows NT)' # https://www.virustotal.com/gui/file/8abbef8e58f012d45a7cb46c3c2729dcd33cf53e721ff8c59e238862aa0a9e0e/detection
- 'Mozilla/4.0(compatible; MSIE 6.0; Windows NT 5.1)' # MacControl malware https://www.virustotal.com/gui/file/d60f61f1f03a5011a0240694e110c6d370bf68a92753093186c6d14e26a15428/detection https://www.symantec.com/connect/blogs/osxmacontrol-back-it-again
- 'Mozilla/5.0 (Windows NT 10.0; Win64; x64)' # used by Zebrocy malware https://app.any.run/tasks/7d7fa4a0-6970-4428-828b-29572abf9ceb/
# Ursnif
- 'Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 10.0; Win64; x64)'
- 'Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 6.1; Win64; x64)'
# Emotet
- 'Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 6.2; WOW64; Trident/7.0; .NET4.0C; .NET4.0E; InfoPath.3)' # https://twitter.com/webbthewombat/status/1225827092132179968
# Lockbit (https://twitter.com/kladblokje_88/status/1614673320124743681?s=12&t=joEpeVa5d58aHYNGA_To7Q)
- 'Mozilla/5.0 (Windows NT 6.1)'
- 'AppleWebkit/587.38 (KHTML, like Gecko)'
- 'Chrome/91.0.4472.77'
- 'Safari/537.36'
- 'Edge/91.0.864.37'
- 'Firefox/89.0'
- 'Gecko/20100101'
# Others
- '* pxyscand*'
- '* asd'
- '* mdms'
- 'sample'
- 'nocase'
- 'Moxilla'
- 'Win32 *'
- '*Microsoft Internet Explorer*'
- 'agent *'
- 'AutoIt' # Suspicious - base-lining recommended
- 'IczelionDownLoad'
- 'Mozilla/4.0 (compatible; MSIE 9.0; Windows NT 10.0; .NET4.0C; .NET4.0E; Tablet PC 2.0)' # https://unit42.paloaltonetworks.com/thor-plugx-variant/
- 'record' # https://blog.sekoia.io/raccoon-stealer-v2-part-1-the-return-of-the-dead/
- 'mozzzzzzzzzzz' # https://blog.sekoia.io/raccoon-stealer-v2-part-1-the-return-of-the-dead/
- 'Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:76.0) Gecko/20100101 Firefox/76.0' # Quasar RAT UA https://twitter.com/malmoeb/status/1559994820692672519?s=20&t=g3tkNL09dZZWbFN10qDVjg
- 'Havana/0.1' # https://www.cybereason.com/blog/threat-alert-havanacrypt-ransomware-masquerading-as-google-update
- 'antSword/v2.1' # AntSword Webshell UA
- 'rqwrwqrqwrqw' # Racoon Stealer
- 'qwrqrwrqwrqwr' # Racoon Stealer
- 'rc2.0/client' # Racoon Stealer
- 'TakeMyPainBack' # Racoon Stealer
- 'xxx' # Racoon Stealer
- '20112211' # Racoon Stealer
- '23591' # Racoon Stealer
- '901785252112' # Racoon Stealer
- '1235125521512' # Racoon Stealer
- '125122112551' # Racoon Stealer
- 'B1D3N_RIM_MY_ASS' # Racoon Stealer
- 'AYAYAYAY1337' # Racoon Stealer
- 'iMightJustPayMySelfForAFeature' # Racoon Stealer
- 'ForAFeature' # Racoon Stealer
- 'Ares_ldr_v_*' # AresLoader
# - 'Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:106.0) Gecko/20100101 Firefox/106' # seen used by AresLoader
- 'Microsoft Internet Explorer' # https://github.com/silence-is-best/c2db
- 'CLCTR' # https://github.com/silence-is-best/c2db
- 'uploader' # https://github.com/silence-is-best/c2db
- 'agent' # https://github.com/silence-is-best/c2db
- 'License' # https://github.com/silence-is-best/c2db
- 'vb wininet' # https://github.com/silence-is-best/c2db
- 'Client' # https://github.com/silence-is-best/c2db
- 'Lilith-Bot/3.0' # Lilith Stealer - https://twitter.com/suyog41/status/1558051450797690880
- 'svc/1.0' # SVC Loader - https://twitter.com/suyog41/status/1558051450797690880
- 'WSHRAT' # WSHRAT - https://twitter.com/suyog41/status/1558051450797690880
- 'ZeroStresser Botnet/1.5' # Zerobot - https://twitter.com/suyog41/status/1558051450797690880
- 'OK' # Nymaim - https://twitter.com/suyog41/status/1558051450797690880
- 'Project1sqlite' # DarkCloud - https://twitter.com/suyog41/status/1558051450797690880
- 'Project1' # DarkCloud - https://twitter.com/suyog41/status/1558051450797690880
- 'DuckTales' # Racoon Stealer
- 'Zadanie' # Racoon Stealer
- 'GunnaWunnaBlueTips' # Racoon Stealer
- 'Xlmst' # Racoon Stealer
- 'GeekingToTheMoon' # Racoon Stealer
- 'SunShineMoonLight' # Racoon Stealer
- 'BunnyRequester' # BunnyStealer
- 'BunnyTasks' # BunnyStealer
- 'BunnyStealer' # BunnyStealer
- 'BunnyLoader_Dropper' # BunnyStealer
- 'BunnyLoader' # BunnyStealer
- 'BunnyShell' # BunnyStealer
- 'SPARK-COMMIT' # SparkRAT - https://arcticwolf.com/resources/blog/tellmethetruth-exploitation-of-cve-2023-46604-leading-to-ransomware/
- '4B4DB4B3' # B4B3RAT - https://twitter.com/naumovax/status/1718956514491130301
- 'SouthSide' # Racoon Stealer
- 'Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 5.1; Tob 1.1)' # Latrodectus loader
condition: selection
falsepositives:
- Unknown
level: high
title: HackTool - Empire UserAgent URI Combo
id: b923f7d6-ac89-4a50-a71a-89fb846b4aa8
status: test
description: Detects user agent and URI paths used by empire agents
references:
- https://github.com/BC-SECURITY/Empire
author: Florian Roth (Nextron Systems)
date: 2020-07-13
modified: 2024-02-26
tags:
- attack.command-and-control
- attack.t1071.001
logsource:
category: proxy
detection:
selection:
c-useragent: 'Mozilla/5.0 (Windows NT 6.1; WOW64; Trident/7.0; rv:11.0) like Gecko'
cs-uri:
- '/admin/get.php'
- '/news.php'
- '/login/process.php'
cs-method: 'POST'
condition: selection
falsepositives:
- Valid requests with this exact user agent to server scripts of the defined names
level: high
title: APT User Agent
id: 6ec820f2-e963-4801-9127-d8b2dce4d31b
status: test
description: Detects suspicious user agent strings used in APT malware in proxy logs
references:
- Internal Research
author: Florian Roth (Nextron Systems), Markus Neis
date: 2019-11-12
modified: 2024-02-15
tags:
- attack.command-and-control
- attack.t1071.001
logsource:
category: proxy
detection:
selection:
c-useragent:
# APT Related
- 'SJZJ (compatible; MSIE 6.0; Win32)' # APT Backspace
- 'Mozilla/5.0 (Windows NT 6.; WOW64; rv:20.0) Gecko/20100101 Firefox/20.0' # APT GrizzlySteppe - ChopStick - US CERT https://www.cisa.gov/news-events/alerts/2017/02/10/enhanced-analysis-grizzly-steppe
- 'User-Agent: Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 6.1; Trident/4.0; SLCC' # Comment Crew Miniasp
- 'Mozilla/4.0 (compatible; MSIE 7.4; Win32;32-bit)' # Comment Crew Miniasp
- 'webclient' # Naikon APT
- 'Mozilla/5.0 (Windows; U; Windows NT 5.1; zh-EN; rv:1.7.12) Gecko/200' # Naikon APT
- 'Mozilla/4.0 (compatible; MSI 6.0;' # SnowGlobe Babar - yes, it is cut
- 'Mozilla/5.0 (Windows NT 6.3; WOW64; rv:28.0) Gecko/20100101 Firefox/28.0' # Sofacy - Xtunnel
- 'Mozilla/5.0 (Windows NT 6.2; WOW64; rv:20.0) Gecko/20100101 Firefox/' # Sofacy - Xtunnel
- 'Mozilla/5.0 (Windows NT 6.; WOW64; rv:20.0) Gecko/20100101 Firefox/2' # Sofacy - Xtunnel
- 'Mozilla/4.0' # Derusbi backdoor ELF https://github.com/fideliscyber/indicators/tree/master/FTA-1021
- 'Netscape' # Unit78020 Malware
- 'Mozilla/5.0 (Windows; U; Windows NT 5.1; zh-EN; rv:1.7.12) Gecko/20100719 Firefox/1.0.7' # Unit78020 Malware
- 'Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.2.13) Firefox/3.6.13 GTB7.1' # Winnti related
- 'Mozilla/5.0 (compatible; MSIE 9.0; Windows NT 6.1; WOW64; Trident/5.0)' # Winnti related
- 'Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 6.1; WOW64; Trident/4.0; SLCC2; .NETCLR 2.0.50727)' # APT17
- 'Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 6.0; SV1)' # Bronze Butler - Daserf
- 'Mozilla/4.0 (compatible; MSIE 11.0; Windows NT 6.1; SV1)' # Bronze Butler - Daserf
- 'Mozilla/4.0 (compatible; MSIE 8.0; Win32)' # TSCookie https://app.any.run/tasks/0996b314-5133-491b-8d23-d431ffdec597
- 'Mozilla v5.1 (Windows NT 6.1; rv:6.0.1) Gecko/20100101 Firefox/6.0.1' # Delphi downloader https://www.welivesecurity.com/2018/04/24/sednit-update-analysis-zebrocy/
- 'Mozilla/6.1 (compatible; MSIE 9.0; Windows NT 5.3; Trident/5.0)' # VPNFilter https://blog.talosintelligence.com/2018/05/VPNFilter.html
- 'Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1; .NET CLR 1.1.4322; .NET CLR 2.0.50727; .NET CLR 3.0.04506.30; .NET CLR 3.0.04506.648; InfoPath.1)' # Sofacy User-Agent https://researchcenter.paloaltonetworks.com/2018/06/unit42-sofacy-groups-parallel-attacks/
- 'Mozilla/5.0 (Windows NT 6.1; WOW64) WinHttp/1.6.3.8 (WinHTTP/5.1) like Gecko' # Sofacy User-Agent https://researchcenter.paloaltonetworks.com/2018/06/unit42-sofacy-groups-parallel-attacks/
- 'Mozilla v5.1 *' # Sofacy Zebrocy samples
- 'MSIE 8.0' # Sofacy Azzy Backdoor from https://www.hybrid-analysis.com/sample/a80e29c0757bee05338fd5c22a542d852ad86c477068e3eb4aacc1c3e59e2eef?environmentId=100
- 'Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 6.1; SLCC2; .NET CLR 2.0.50727; .NET CLR 3.5.30729; .NET CLR 3.0.30729; Media Center PC 6.0; .NET4.0C; .NET4.0E; InfoPath.2)' # https://www.fireeye.com/blog/threat-research/2018/07/microsoft-office-vulnerabilities-used-to-distribute-felixroot-backdoor.html
- 'Mozilla/4.0 (compatible; RMS)' # Attacks on industrial enterprises using RMS and TeamViewer - https://securelist.com/attacks-on-industrial-enterprises-using-rms-and-teamviewer/87104/
- 'Mozilla/4.0 (compatible; MSIE 6.0; DynGate)' # Attacks on industrial enterprises using RMS and TeamViewer - https://securelist.com/attacks-on-industrial-enterprises-using-rms-and-teamviewer/87104/
- 'O/9.27 (W; U; Z)' # Cmstar https://www.virustotal.com/#/file/e4328011bb2b04abc856ccd04404c9f95d67167f6c291d343e8ffa8aa2aa2099/details
- 'Mozilla/5.0 (compatible; MSIE 9.0; Windows NT 6.0; Trident/5.0; Trident/5.0*' # KerrDown UA
- 'Mozilla/5.0 (Windows NT 9; *' # Suspicious 'Windows NT 9' user agent - used by APT33 malware in 2018
- 'hots scot' # Unknown iOS zero-day implant https://twitter.com/craiu/status/1176437994288484352?s=20
- 'Mozilla/5.0 (compatible; MSIE 10.0; Windows NT)' # https://blog.telsy.com/meeting-powerband-the-apt33-net-powerton-variant/
- 'Mozilla/5.0 (Windows NT 6.1; WOW64) Chrome/28.0.1500.95 Safari/537.36' # Hidden Cobra malware
- 'Mozilla/5.0 (Windows NT 6.2; Win32; rv:47.0)' # Strong Pity loader https://twitter.com/VK_Intel/status/1264185981118406657
- 'Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1;SV1;' # Mustang Panda https://insights.oem.avira.com/new-wave-of-plugx-targets-hong-kong/
- 'Mozilla/5.0 (X11; Linux i686; rv:22.0) Firefox/22.0' # BackdoorDiplomacy https://www.welivesecurity.com/2021/06/10/backdoordiplomacy-upgrading-quarian-turian/
- 'Mozilla/5.0 Chrome/72.0.3626.109 Safari/537.36' # SideWalk malware used by Sparkling Goblin
- 'Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:FTS_06) Gecko/22.36.35.06 Firefox/2.0' # LitePower stager used by WRITE https://securelist.com/wirtes-campaign-in-the-middle-east-living-off-the-land-since-at-least-2019/105044/
- 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/102.0.5005.63 Safari/537.36 Edg/100.0.1185.39' # https://www.microsoft.com/security/blog/2022/09/29/zinc-weaponizing-open-source-software/
- 'Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 6.1; WOW64; Trident/4.0; SLCC2; .NET CLR 2.0.50727; .NET CLR 3.5.30729; .NET CLR 3.0.30729; InfoPath.3; .NET4.0C; .NET4.0E)' # https://www.microsoft.com/security/blog/2022/09/29/zinc-weaponizing-open-source-software/
- 'Mozilla/4.0 (compatible; MSIE 9.0; Windows NT 10.0; .NET4.0C; .NET4.0E; Tablet PC 2.0)' # PlugX backdoor https://unit42.paloaltonetworks.com/thor-plugx-variant/
- 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/42.0.2311.135 Safari/537.36 Edge/12.246001' # RedCurl Downloader APT https://www.facct.ru/blog/redcurl-2024
condition: selection
falsepositives:
- Old browsers
level: high
title: Windows WebDAV User Agent
id: e09aed7a-09e0-4c9a-90dd-f0d52507347e
status: test
description: Detects WebDav DownloadCradle
references:
- https://mgreen27.github.io/posts/2018/04/02/DownloadCradle.html
author: Florian Roth (Nextron Systems)
date: 2018-04-06
modified: 2021-11-27
tags:
- attack.command-and-control
- attack.t1071.001
logsource:
category: proxy
detection:
selection:
c-useragent|startswith: 'Microsoft-WebDAV-MiniRedir/'
cs-method: 'GET'
condition: selection
falsepositives:
- Administrative scripts that download files from the Internet
- Administrative scripts that retrieve certain website contents
- Legitimate WebDAV administration
level: high
title: Exploit Framework User Agent
id: fdd1bfb5-f60b-4a35-910e-f36ed3d0b32f
status: test
description: Detects suspicious user agent strings used by exploit / pentest frameworks like Metasploit in proxy logs
references:
- https://blog.didierstevens.com/2015/03/16/quickpost-metasploit-user-agent-strings/
author: Florian Roth (Nextron Systems)
date: 2017-07-08
modified: 2025-01-18
tags:
- attack.command-and-control
- attack.t1071.001
logsource:
category: proxy
detection:
selection:
c-useragent:
# Cobalt Strike https://www.cobaltstrike.com/help-malleable-c2
- 'Internet Explorer *'
- 'Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1; InfoPath.2)' # https://bluescreenofjeff.com/2016-06-28-cobalt-strike-http-c2-redirectors-with-apache-mod_rewrite/
# Metasploit Framework - Analysis by Didier Stevens https://blog.didierstevens.com/2015/03/16/quickpost-metasploit-user-agent-strings/
- 'Mozilla/4.0 (compatible; Metasploit RSPEC)'
- 'Mozilla/4.0 (compatible; MSIE 6.1; Windows NT)'
- 'Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1)' # old browser, rare, base-lining needed
- 'Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 6.0)' # old browser, rare, base-lining needed
- 'Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 6.0; Trident/4.0)' # old browser, rare, base-lining needed
- 'Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 6.0; Trident/4.0; SIMBAR={7DB0F6DE-8DE7-4841-9084-28FA914B0F2E}; SLCC1; .N'
- 'Mozilla/5.0 (compatible; Googlebot/2.1; +http://www.google.com/bot.html)' # only use in proxy logs - not for detection in web server logs
- 'Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US) AppleWebKit/525.13 (KHTML, like Gecko) Chrome/4.0.221.6 Safari/525.13'
- 'Mozilla/5.0 (compatible; MSIE 9.0; Windows NT 6.1; WOW64; Trident/5.0; MAAU)' # Payloads
# Metasploit Update by Florian Roth 08.07.2017
- 'Mozilla/5.0'
- 'Mozilla/4.0 (compatible; SPIPE/1.0'
# - 'Mozilla/5.0 (compatible; MSIE 10.0; Windows NT 6.1; Trident/6.0)' # too many false positives expected
# - 'Mozilla/5.0 (Windows NT 6.1; Trident/7.0; rv:11.0) like Gecko' # too many false positives expected
- 'Mozilla/5.0 (Windows NT 6.3; rv:39.0) Gecko/20100101 Firefox/35.0'
- 'Sametime Community Agent' # Unknown if prone to false positives - https://github.com/rapid7/metasploit-framework/blob/97095ab3113de2f046e64a64c461a1f888554401/modules/exploits/windows/http/steamcast_useragent.rb
- 'X-FORWARDED-FOR'
- 'DotDotPwn v2.1'
- 'SIPDROID'
- 'Mozilla/5.0 (Windows NT 10.0; Win32; x32; rv:60.0)' # CobaltStrike https://unit42.paloaltonetworks.com/tracking-oceanlotus-new-downloader-kerrdown/
# Empire
- 'Mozilla/6.0 (X11; Linux x86_64; rv:24.0) Gecko/20140205 Firefox/27.0 Iceweasel/25.3.0'
# Exploits
- '*wordpress hash grabber*'
- '*exploit*'
# Havoc
- 'Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/96.0.4664.110 Safari/537.36' # https://github.com/HavocFramework/Havoc/issues/519
condition: selection
falsepositives:
- Unknown
level: high
title: Crypto Miner User Agent
id: fa935401-513b-467b-81f4-f9e77aa0dd78
status: test
description: Detects suspicious user agent strings used by crypto miners in proxy logs
references:
- https://github.com/xmrig/xmrig/blob/da22b3e6c45825f3ac1f208255126cb8585cd4fc/src/base/kernel/Platform_win.cpp#L65
- https://github.com/xmrig/xmrig/blob/427b6516e0550200c17ca28675118f0fffcc323f/src/version.h
author: Florian Roth (Nextron Systems)
date: 2019-10-21
modified: 2021-11-27
tags:
- attack.command-and-control
- attack.t1071.001
logsource:
category: proxy
detection:
selection:
c-useragent|startswith:
# XMRig
- 'XMRig '
# CCMiner
- 'ccminer'
condition: selection
falsepositives:
- Unknown
level: high
title: Bitsadmin to Uncommon IP Server Address
id: 8ccd35a2-1c7c-468b-b568-ac6cdf80eec3
status: test
description: Detects Bitsadmin connections to IP addresses instead of FQDN names
references:
- https://isc.sans.edu/diary/Microsoft+BITS+Used+to+Download+Payloads/21027
author: Florian Roth (Nextron Systems)
date: 2022-06-10
modified: 2022-08-24
tags:
- attack.command-and-control
- attack.execution
- attack.stealth
- attack.t1071.001
- attack.persistence
- attack.t1197
- attack.s0190
logsource:
category: proxy
detection:
selection:
c-useragent|startswith: 'Microsoft BITS/'
cs-host|endswith:
- '1'
- '2'
- '3'
- '4'
- '5'
- '6'
- '7'
- '8'
- '9'
condition: selection
falsepositives:
- Unknown
level: high
title: Suspicious User Agent
id: 7195a772-4b3f-43a4-a210-6a003d65caa1
status: test
description: Detects suspicious malformed user agent strings in proxy logs
references:
- https://github.com/fastly/waf_testbed/blob/8bfc406551f3045e418cbaad7596cff8da331dfc/templates/default/scanners-user-agents.data.erb
author: Florian Roth (Nextron Systems)
date: 2017-07-08
modified: 2022-10-31
tags:
- attack.command-and-control
- attack.t1071.001
logsource:
category: proxy
detection:
selection1:
c-useragent|startswith:
- 'user-agent' # User-Agent: User-Agent:
- 'Mozilla/3.0 '
- 'Mozilla/2.0 '
- 'Mozilla/1.0 '
- 'Mozilla ' # missing slash
- ' Mozilla/' # leading space
- 'Mozila/' # single 'l'
- 'Mozilla/4.0 (compatible; MSIE 6.0; MS Web Services Client Protocol' # https://twitter.com/NtSetDefault/status/1303643299509567488
selection2:
c-useragent|contains:
- ' (compatible;MSIE ' # typical typo - missing space
- '.0;Windows NT ' # typical typo - missing space
- 'loader' # https://twitter.com/securityonion/status/1522614635152744453?s=20&t=gHyPTSq5A27EqKwrCd9ohg
selection3:
c-useragent:
- '_'
- 'CertUtil URL Agent' # https://twitter.com/stvemillertime/status/985150675527974912
- 'Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:60.0)' # CobaltStrike Beacon https://unit42.paloaltonetworks.com/tracking-oceanlotus-new-downloader-kerrdown/
- 'Mozilla/5.0 (Windows NT 6.3; WOW64; rv:28.0) Gecko/20100101 Firefox/28.0' # used by APT28 malware https://threatvector.cylance.com/en_us/home/inside-the-apt28-dll-backdoor-blitz.html
- 'HTTPS' # https://twitter.com/stvemillertime/status/1204437531632250880
- 'Erbium-UA-4ce7c27cb4be9d32e333bf032c88235a' # https://www.cyfirma.com/outofband/erbium-stealer-malware-report
- 'x' # Use by Racoon Stealer but could be something else
- 'xxx' # Use by Racoon Stealer but could be something else
falsepositives:
- c-useragent: 'Mozilla/3.0 * Acrobat *' # Acrobat with linked content
- cs-host|endswith: # Adobe product traffic, example: Mozilla/3.0 (compatible; Adobe Synchronizer 10.12.20000)
- '.acrobat.com'
- '.adobe.com'
- '.adobe.io'
condition: 1 of selection* and not falsepositives
falsepositives:
- Unknown
level: high
title: HackTool - CobaltStrike Malleable Profile Patterns - Proxy
id: f3f21ce1-cdef-4bfc-8328-ed2e826f5fac
related:
- id: 953b895e-5cc9-454b-b183-7f3db555452e
type: obsolete
- id: 41b42a36-f62c-4c34-bd40-8cb804a34ad8
type: obsolete
- id: 37325383-740a-403d-b1a2-b2b4ab7992e7
type: obsolete
- id: c9b33401-cc6a-4cf6-83bb-57ddcb2407fc
type: obsolete
status: test
description: Detects cobalt strike malleable profiles patterns (URI, User-Agents, Methods).
references:
- https://github.com/rsmudge/Malleable-C2-Profiles/blob/26323784672913923d20c5a638c6ca79459e8529/normal/amazon.profile
- https://www.hybrid-analysis.com/sample/ee5eca8648e45e2fea9dac0d920ef1a1792d8690c41ee7f20343de1927cc88b9?environmentId=100
- https://github.com/rsmudge/Malleable-C2-Profiles/blob/26323784672913923d20c5a638c6ca79459e8529/normal/ocsp.profile
- https://github.com/yeyintminthuhtut/Malleable-C2-Profiles-Collection/
- https://github.com/rsmudge/Malleable-C2-Profiles/blob/26323784672913923d20c5a638c6ca79459e8529/normal/onedrive_getonly.profile
author: Markus Neis, Florian Roth (Nextron Systems)
date: 2024-02-15
tags:
- attack.command-and-control
- attack.t1071.001
logsource:
category: proxy
detection:
selection_amazon_1:
c-useragent: 'Mozilla/5.0 (Windows NT 6.1; WOW64; Trident/7.0; rv:11.0) like Gecko'
cs-method: 'GET'
c-uri: '/s/ref=nb_sb_noss_1/167-3294888-0262949/field-keywords=books'
cs-host: 'www.amazon.com'
cs-cookie|endswith: '=csm-hit=s-24KU11BB82RZSYGJ3BDK|1419899012996'
selection_amazon_2:
c-useragent: 'Mozilla/5.0 (Windows NT 6.1; WOW64; Trident/7.0; rv:11.0) like Gecko'
cs-method: 'POST'
c-uri: '/N4215/adj/amzn.us.sr.aps'
cs-host: 'www.amazon.com'
selection_generic_1:
c-useragent:
- 'Mozilla/4.0 (compatible; MSIE 6.0;Windows NT 5.1)'
- 'Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 6.1; WOW64; Trident/4.0; SLCC2; .NET CLR 3.0.30729; .NET4.0C; .NET4.0E )'
- 'Mozilla/5.0 (Windows; U; MSIE 7.0; Windows NT 5.2) Java/1.5.0_08'
selection_generic_2:
c-useragent|endswith: '; MANM; MANM)'
selection_oscp:
c-uri|contains: '/oscp/'
cs-host: 'ocsp.verisign.com'
selection_onedrive:
cs-method: 'GET'
c-uri|endswith: '\?manifest=wac'
cs-host: 'onedrive.live.com'
filter_main_onedrive:
c-uri|startswith: 'http'
c-uri|contains: '://onedrive.live.com/'
condition: 1 of selection_* and not 1 of filter_main_*
falsepositives:
- Unknown
level: high
title: OpenCanary - HTTPPROXY Login Attempt
id: 5498fc09-adc6-4804-b9d9-5cca1f0b8760
status: test
description: |
Detects instances where an HTTPPROXY service on an OpenCanary node has had an attempt to proxy another page.
references:
- https://opencanary.readthedocs.io/en/latest/starting/configuration.html#services-configuration
- https://github.com/thinkst/opencanary/blob/a0896adfcaf0328cfd5829fe10d2878c7445138e/opencanary/logger.py#L52
author: Security Onion Solutions
date: 2024-03-08
tags:
- attack.initial-access
- attack.command-and-control
- attack.t1090
logsource:
category: application
product: opencanary
detection:
selection:
logtype: 7001
condition: selection
falsepositives:
- Unlikely
level: high
title: Malicious IP Address Sign-In Failure Rate
id: a3f55ebd-0c01-4ed6-adc0-8fb76d8cd3cd
status: test
description: Indicates sign-in from a malicious IP address based on high failure rates.
references:
- https://learn.microsoft.com/en-us/entra/id-protection/concept-identity-protection-risks#malicious-ip-address
- https://learn.microsoft.com/en-us/entra/architecture/security-operations-user-accounts#unusual-sign-ins
author: Mark Morowczynski '@markmorow', Gloria Lee, '@gleeiamglo'
date: 2023-09-07
tags:
- attack.t1090
- attack.command-and-control
logsource:
product: azure
service: riskdetection
detection:
selection:
riskEventType: 'maliciousIPAddress'
condition: selection
falsepositives:
- We recommend investigating the sessions flagged by this detection in the context of other sign-ins from the user.
level: high
title: Malicious IP Address Sign-In Suspicious
id: 36440e1c-5c22-467a-889b-593e66498472
status: test
description: Indicates sign-in from a malicious IP address known to be malicious at time of sign-in.
references:
- https://learn.microsoft.com/en-us/entra/id-protection/concept-identity-protection-risks#malicious-ip-address
- https://learn.microsoft.com/en-us/entra/architecture/security-operations-user-accounts#unusual-sign-ins
author: Mark Morowczynski '@markmorow', Gloria Lee, '@gleeiamglo'
date: 2023-09-07
tags:
- attack.t1090
- attack.command-and-control
logsource:
product: azure
service: riskdetection
detection:
selection:
riskEventType: 'suspiciousIPAddress'
condition: selection
falsepositives:
- We recommend investigating the sessions flagged by this detection in the context of other sign-ins from the user.
level: high
title: Sign-In From Malware Infected IP
id: 821b4dc3-1295-41e7-b157-39ab212dd6bd
status: test
description: Indicates sign-ins from IP addresses infected with malware that is known to actively communicate with a bot server.
references:
- https://learn.microsoft.com/en-us/entra/id-protection/concept-identity-protection-risks#malware-linked-ip-address-deprecated
- https://learn.microsoft.com/en-us/entra/architecture/security-operations-user-accounts#unusual-sign-ins
author: Mark Morowczynski '@markmorow', Gloria Lee, '@gleeiamglo'
date: 2023-09-03
tags:
- attack.t1090
- attack.command-and-control
logsource:
product: azure
service: riskdetection
detection:
selection:
riskEventType: 'malwareInfectedIPAddress'
condition: selection
falsepositives:
- Using an IP address that is shared by many users
level: high
title: Communication To LocaltoNet Tunneling Service Initiated - Linux
id: c4568f5d-131f-4e78-83d4-45b2da0ec4f1
status: test
description: |
Detects an executable initiating a network connection to "LocaltoNet" tunneling sub-domains.
LocaltoNet is a reverse proxy that enables localhost services to be exposed to the Internet.
Attackers have been seen to use this service for command-and-control activities to bypass MFA and perimeter controls.
references:
- https://localtonet.com/documents/supported-tunnels
- https://cloud.google.com/blog/topics/threat-intelligence/unc3944-targets-saas-applications
author: Andreas Braathen (mnemonic.io)
date: 2024-06-17
tags:
- attack.command-and-control
- attack.t1572
- attack.t1090
- attack.t1102
logsource:
category: network_connection
product: linux
detection:
selection:
DestinationHostname|endswith:
- '.localto.net'
- '.localtonet.com'
Initiated: 'true'
condition: selection
falsepositives:
- Legitimate use of the LocaltoNet service.
level: high
title: Communication To Ngrok Tunneling Service - Linux
id: 19bf6fdb-7721-4f3d-867f-53467f6a5db6
status: test
description: Detects an executable accessing an ngrok tunneling endpoint, which could be a sign of forbidden exfiltration of data exfiltration by malicious actors
references:
- https://twitter.com/hakluke/status/1587733971814977537/photo/1
- https://ngrok.com/docs/secure-tunnels/tunnels/ssh-reverse-tunnel-agent
author: Florian Roth (Nextron Systems)
date: 2022-11-03
tags:
- attack.exfiltration
- attack.command-and-control
- attack.t1567
- attack.t1568.002
- attack.t1572
- attack.t1090
- attack.t1102
- attack.s0508
logsource:
product: linux
category: network_connection
detection:
selection:
DestinationHostname|contains:
- 'tunnel.us.ngrok.com'
- 'tunnel.eu.ngrok.com'
- 'tunnel.ap.ngrok.com'
- 'tunnel.au.ngrok.com'
- 'tunnel.sa.ngrok.com'
- 'tunnel.jp.ngrok.com'
- 'tunnel.in.ngrok.com'
condition: selection
falsepositives:
- Legitimate use of ngrok
level: high
title: Communication To LocaltoNet Tunneling Service Initiated
id: 3ab65069-d82a-4d44-a759-466661a082d1
status: test
description: |
Detects an executable initiating a network connection to "LocaltoNet" tunneling sub-domains.
LocaltoNet is a reverse proxy that enables localhost services to be exposed to the Internet.
Attackers have been seen to use this service for command-and-control activities to bypass MFA and perimeter controls.
references:
- https://localtonet.com/documents/supported-tunnels
- https://cloud.google.com/blog/topics/threat-intelligence/unc3944-targets-saas-applications
author: Andreas Braathen (mnemonic.io)
date: 2024-06-17
tags:
- attack.command-and-control
- attack.t1572
- attack.t1090
- attack.t1102
logsource:
category: network_connection
product: windows
detection:
selection:
DestinationHostname|endswith:
- '.localto.net'
- '.localtonet.com'
Initiated: 'true'
condition: selection
falsepositives:
- Legitimate use of the LocaltoNet service.
level: high
title: Communication To Ngrok Tunneling Service Initiated
id: 1d08ac94-400d-4469-a82f-daee9a908849
related:
- id: 18249279-932f-45e2-b37a-8925f2597670
type: similar
status: test
description: |
Detects an executable initiating a network connection to "ngrok" tunneling domains.
Attackers were seen using this "ngrok" in order to store their second stage payloads and malware.
While communication with such domains can be legitimate, often times is a sign of either data exfiltration by malicious actors or additional download.
references:
- https://twitter.com/hakluke/status/1587733971814977537/photo/1
- https://ngrok.com/docs/secure-tunnels/tunnels/ssh-reverse-tunnel-agent
author: Florian Roth (Nextron Systems)
date: 2022-11-03
modified: 2024-02-02
tags:
- attack.exfiltration
- attack.command-and-control
- attack.t1567
- attack.t1568.002
- attack.t1572
- attack.t1090
- attack.t1102
- attack.s0508
logsource:
category: network_connection
product: windows
detection:
selection:
DestinationHostname|contains:
- 'tunnel.us.ngrok.com'
- 'tunnel.eu.ngrok.com'
- 'tunnel.ap.ngrok.com'
- 'tunnel.au.ngrok.com'
- 'tunnel.sa.ngrok.com'
- 'tunnel.jp.ngrok.com'
- 'tunnel.in.ngrok.com'
condition: selection
falsepositives:
- Legitimate use of the ngrok service.
level: high
title: RDP Port Forwarding Rule Added Via Netsh.EXE
id: 782d6f3e-4c5d-4b8c-92a3-1d05fed72e63
status: test
description: Detects the execution of netsh to configure a port forwarding of port 3389 (RDP) rule
references:
- https://www.fireeye.com/blog/threat-research/2019/01/bypassing-network-restrictions-through-rdp-tunneling.html
author: Florian Roth (Nextron Systems), oscd.community
date: 2019-01-29
modified: 2023-02-13
tags:
- attack.lateral-movement
- attack.command-and-control
- attack.t1090
logsource:
category: process_creation
product: windows
detection:
selection_img:
- Image|endswith: '\netsh.exe'
- OriginalFileName: 'netsh.exe'
selection_cli:
CommandLine|contains|all:
- ' i'
- ' p'
- '=3389'
- ' c'
condition: all of selection_*
falsepositives:
- Legitimate administration activity
level: high
title: PUA - NPS Tunneling Tool Execution
id: 68d37776-61db-42f5-bf54-27e87072d17e
status: test
description: Detects the use of NPS, a port forwarding and intranet penetration proxy server
references:
- https://github.com/ehang-io/nps
author: Florian Roth (Nextron Systems)
date: 2022-10-08
modified: 2024-11-23
tags:
- attack.command-and-control
- attack.t1090
logsource:
category: process_creation
product: windows
detection:
selection_img:
Image|endswith: '\npc.exe'
selection_cli_1:
CommandLine|contains|all:
- ' -server='
- ' -vkey='
- ' -password='
selection_cli_2:
CommandLine|contains: ' -config=npc'
selection_hashes:
# v0.26.10
Hashes|contains:
- "MD5=AE8ACF66BFE3A44148964048B826D005"
- "SHA1=CEA49E9B9B67F3A13AD0BE1C2655293EA3C18181"
- "SHA256=5A456283392FFCEEEACA3D3426C306EB470304637520D72FED1CC1FEBBBD6856"
condition: 1 of selection_*
falsepositives:
- Legitimate use
level: high
title: HackTool - Htran/NATBypass Execution
id: f5e3b62f-e577-4e59-931e-0a15b2b94e1e
status: test
description: Detects executable names or flags used by Htran or Htran-like tools (e.g. NATBypass)
references:
- https://github.com/HiwinCN/HTran
- https://github.com/cw1997/NATBypass
author: Florian Roth (Nextron Systems)
date: 2022-12-27
modified: 2023-02-04
tags:
- attack.command-and-control
- attack.t1090
- attack.s0040
logsource:
category: process_creation
product: windows
detection:
selection_img:
Image|endswith:
- '\htran.exe'
- '\lcx.exe'
selection_cli:
CommandLine|contains:
- '.exe -tran '
- '.exe -slave '
condition: 1 of selection_*
falsepositives:
- Unknown
level: high
title: PUA - Fast Reverse Proxy (FRP) Execution
id: 32410e29-5f94-4568-b6a3-d91a8adad863
status: test
description: Detects the use of Fast Reverse Proxy. frp is a fast reverse proxy to help you expose a local server behind a NAT or firewall to the Internet.
references:
- https://asec.ahnlab.com/en/38156/
- https://github.com/fatedier/frp
author: frack113, Florian Roth
date: 2022-09-02
modified: 2024-11-23
tags:
- attack.command-and-control
- attack.t1090
logsource:
category: process_creation
product: windows
detection:
selection_img:
Image|endswith:
- '\frpc.exe'
- '\frps.exe'
selection_cli:
CommandLine|contains: '\frpc.ini'
selection_hashes:
# v0.44.0
Hashes|contains:
- "MD5=7D9C233B8C9E3F0EA290D2B84593C842"
- "SHA1=06DDC9280E1F1810677935A2477012960905942F"
- "SHA256=57B0936B8D336D8E981C169466A15A5FD21A7D5A2C7DAF62D5E142EE860E387C"
condition: 1 of selection_*
falsepositives:
- Legitimate use
level: high
title: PUA- IOX Tunneling Tool Execution
id: d7654f02-e04b-4934-9838-65c46f187ebc
status: test
description: Detects the use of IOX - a tool for port forwarding and intranet proxy purposes
references:
- https://github.com/EddieIvan01/iox
author: Florian Roth (Nextron Systems)
date: 2022-10-08
modified: 2024-11-23
tags:
- attack.command-and-control
- attack.t1090
logsource:
category: process_creation
product: windows
detection:
selection:
Image|endswith: '\iox.exe'
selection_commandline:
CommandLine|contains:
- '.exe fwd -l '
- '.exe fwd -r '
- '.exe proxy -l '
- '.exe proxy -r '
selection_hashes:
# v0.4
Hashes|contains:
- "MD5=9DB2D314DD3F704A02051EF5EA210993"
- "SHA1=039130337E28A6623ECF9A0A3DA7D92C5964D8DD"
- "SHA256=C6CF82919B809967D9D90EA73772A8AA1C1EB3BC59252D977500F64F1A0D6731"
condition: 1 of selection*
falsepositives:
- Legitimate use
level: high
title: Ngrok Usage with Remote Desktop Service
id: 64d51a51-32a6-49f0-9f3d-17e34d640272
status: test
description: Detects cases in which ngrok, a reverse proxy tool, forwards events to the local RDP port, which could be a sign of malicious behaviour
references:
- https://twitter.com/tekdefense/status/1519711183162556416?s=12&t=OTsHCBkQOTNs1k3USz65Zg
- https://ngrok.com/
author: Florian Roth (Nextron Systems)
date: 2022-04-29
tags:
- attack.command-and-control
- attack.t1090
logsource:
product: windows
service: terminalservices-localsessionmanager
detection:
selection:
EventID: 21
Address|contains: '16777216'
condition: selection
falsepositives:
- Unknown
level: high
title: RDP over Reverse SSH Tunnel WFP
id: 5bed80b6-b3e8-428e-a3ae-d3c757589e41
status: test
description: Detects svchost hosting RDP termsvcs communicating with the loopback address
references:
- https://twitter.com/SBousseaden/status/1096148422984384514
- https://github.com/sbousseaden/EVTX-ATTACK-SAMPLES/blob/44fbe85f72ee91582876b49678f9a26292a155fb/Command%20and%20Control/DE_RDP_Tunnel_5156.evtx
author: Samir Bousseaden
date: 2019-02-16
modified: 2022-09-02
tags:
- attack.command-and-control
- attack.lateral-movement
- attack.t1090.001
- attack.t1090.002
- attack.t1021.001
- car.2013-07-002
logsource:
product: windows
service: security
detection:
selection:
EventID: 5156
sourceRDP:
SourcePort: 3389
DestAddress:
- '127.*'
- '::1'
destinationRDP:
DestPort: 3389
SourceAddress:
- '127.*'
- '::1'
filter_app_container:
FilterOrigin: 'AppContainer Loopback'
filter_thor: # checking BlueKeep vulnerability
Application|endswith:
- '\thor.exe'
- '\thor64.exe'
condition: selection and ( sourceRDP or destinationRDP ) and not 1 of filter*
falsepositives:
- Programs that connect locally to the RDP port
level: high
title: DNS Query Tor .Onion Address - Sysmon
id: b55ca2a3-7cff-4dda-8bdd-c7bfa63bf544
related:
- id: 8384bd26-bde6-4da9-8e5d-4174a7a47ca2
type: similar
- id: a8322756-015c-42e7-afb1-436e85ed3ff5
type: similar
status: test
description: Detects DNS queries to an ".onion" address related to Tor routing networks
references:
- https://www.logpoint.com/en/blog/detecting-tor-use-with-logpoint/
- https://github.com/Azure/Azure-Sentinel/blob/f99542b94afe0ad2f19a82cc08262e7ac8e1428e/Detections/ASimDNS/imDNS_TorProxies.yaml
author: frack113
date: 2022-02-20
modified: 2025-09-12
tags:
- attack.command-and-control
- attack.t1090.003
logsource:
product: windows
category: dns_query
detection:
selection:
QueryName|endswith:
- '.hiddenservice.net'
- '.onion.ca'
- '.onion.cab'
- '.onion.casa'
- '.onion.city'
- '.onion.direct'
- '.onion.dog'
- '.onion.glass'
- '.onion.gq'
- '.onion.ink'
- '.onion.it'
- '.onion.link'
- '.onion.lt'
- '.onion.lu'
- '.onion.nu'
- '.onion.pet'
- '.onion.plus'
- '.onion.rip'
- '.onion.sh'
- '.onion.to'
- '.onion.top'
- '.onion'
- '.s1.tor-gateways.de'
- '.s2.tor-gateways.de'
- '.s3.tor-gateways.de'
- '.s4.tor-gateways.de'
- '.s5.tor-gateways.de'
- '.t2w.pw'
- '.tor2web.ae.org'
- '.tor2web.blutmagie.de'
- '.tor2web.com'
- '.tor2web.fi'
- '.tor2web.io'
- '.tor2web.org'
- '.tor2web.xyz'
- '.torlink.co'
condition: selection
falsepositives:
- Unknown
level: high
title: Tor Client/Browser Execution
id: 62f7c9bf-9135-49b2-8aeb-1e54a6ecc13c
status: test
description: Detects the use of Tor or Tor-Browser to connect to onion routing networks
references:
- https://www.logpoint.com/en/blog/detecting-tor-use-with-logpoint/
author: frack113
date: 2022-02-20
modified: 2025-10-27
tags:
- attack.command-and-control
- attack.t1090.003
logsource:
category: process_creation
product: windows
detection:
selection:
- Description: 'Tor Browser'
- Product: 'Tor Browser'
- Image|endswith:
- '\tor.exe'
- '\Tor Browser\Browser\firefox.exe'
condition: selection
falsepositives:
- Unknown
level: high
regression_tests_path: regression_data/rules/windows/process_creation/proc_creation_win_browsers_tor_execution/info.yml
title: Query Tor Onion Address - DNS Client
id: 8384bd26-bde6-4da9-8e5d-4174a7a47ca2
related:
- id: b55ca2a3-7cff-4dda-8bdd-c7bfa63bf544
type: similar
- id: a8322756-015c-42e7-afb1-436e85ed3ff5
type: similar
status: test
description: Detects DNS resolution of an .onion address related to Tor routing networks
references:
- https://www.logpoint.com/en/blog/detecting-tor-use-with-logpoint/
- https://github.com/Azure/Azure-Sentinel/blob/f99542b94afe0ad2f19a82cc08262e7ac8e1428e/Detections/ASimDNS/imDNS_TorProxies.yaml
author: Nasreddine Bencherchali (Nextron Systems)
date: 2022-02-20
modified: 2025-09-12
tags:
- attack.command-and-control
- attack.t1090.003
logsource:
product: windows
service: dns-client
definition: 'Requirements: Microsoft-Windows-DNS Client Events/Operational Event Log must be enabled/collected in order to receive the events.'
detection:
selection:
EventID: 3008
QueryName|endswith:
- '.hiddenservice.net'
- '.onion.ca'
- '.onion.cab'
- '.onion.casa'
- '.onion.city'
- '.onion.direct'
- '.onion.dog'
- '.onion.glass'
- '.onion.gq'
- '.onion.guide'
- '.onion.in.net'
- '.onion.ink'
- '.onion.it'
- '.onion.link'
- '.onion.lt'
- '.onion.lu'
- '.onion.ly'
- '.onion.mn'
- '.onion.network'
- '.onion.nu'
- '.onion.pet'
- '.onion.plus'
- '.onion.pt'
- '.onion.pw'
- '.onion.rip'
- '.onion.sh'
- '.onion.si'
- '.onion.to'
- '.onion.top'
- '.onion.ws'
- '.onion'
- '.s1.tor-gateways.de'
- '.s2.tor-gateways.de'
- '.s3.tor-gateways.de'
- '.s4.tor-gateways.de'
- '.s5.tor-gateways.de'
- '.t2w.pw'
- '.tor2web.ae.org'
- '.tor2web.blutmagie.de'
- '.tor2web.com'
- '.tor2web.fi'
- '.tor2web.io'
- '.tor2web.org'
- '.tor2web.xyz'
- '.torlink.co'
condition: selection
falsepositives:
- Unlikely
level: high
title: OpenCanary - NTP Monlist Request
id: 7cded4b3-f09e-405a-b96f-24248433ba44
status: test
description: Detects instances where an NTP service on an OpenCanary node has had a NTP monlist request.
references:
- https://opencanary.readthedocs.io/en/latest/starting/configuration.html#services-configuration
- https://github.com/thinkst/opencanary/blob/a0896adfcaf0328cfd5829fe10d2878c7445138e/opencanary/logger.py#L52
author: Security Onion Solutions
date: 2024-03-08
tags:
- attack.impact
- attack.t1498
logsource:
category: application
product: opencanary
detection:
selection:
logtype: 11001
condition: selection
falsepositives:
- Unlikely
level: high
title: NTFS Vulnerability Exploitation
id: f14719ce-d3ab-4e25-9ce6-2899092260b0
status: test
description: This the exploitation of a NTFS vulnerability as reported without many details via Twitter
references:
- https://twitter.com/jonasLyk/status/1347900440000811010
- https://twitter.com/wdormann/status/1347958161609809921
- https://www.bleepingcomputer.com/news/security/windows-10-bug-corrupts-your-hard-drive-on-seeing-this-files-icon/
author: Florian Roth (Nextron Systems)
date: 2021-01-11
modified: 2022-12-25
tags:
- attack.impact
- attack.t1499.001
logsource:
product: windows
service: system
detection:
selection:
Provider_Name: Ntfs
EventID: 55
Origin: 'File System Driver'
Description|contains|all:
- 'contains a corrupted file record'
- 'The name of the file is "\"'
condition: selection
falsepositives:
- Unlikely
level: high
title: Nginx Core Dump
id: 59ec40bb-322e-40ab-808d-84fa690d7e56
status: test
description: Detects a core dump of a crashing Nginx worker process, which could be a signal of a serious problem or exploitation attempts.
references:
- https://docs.nginx.com/nginx/admin-guide/monitoring/debugging/#enabling-core-dumps
- https://www.x41-dsec.de/lab/advisories/x41-2021-002-nginx-resolver-copy/
author: Florian Roth (Nextron Systems)
date: 2021-05-31
modified: 2023-05-08
tags:
- attack.impact
- attack.t1499.004
logsource:
service: nginx
detection:
keywords:
- 'exited on signal 6 (core dumped)'
condition: keywords
falsepositives:
- Serious issues with a configuration or plugin
level: high
title: Apache Segmentation Fault
id: 1da8ce0b-855d-4004-8860-7d64d42063b1
status: test
description: Detects a segmentation fault error message caused by a crashing apache worker process
references:
- http://www.securityfocus.com/infocus/1633
author: Florian Roth (Nextron Systems)
date: 2017-02-28
modified: 2021-11-27
tags:
- attack.impact
- attack.t1499.004
logsource:
service: apache
definition: 'Requirements: Must be able to collect the error.log file'
detection:
keywords:
- 'exit signal Segmentation Fault'
condition: keywords
falsepositives:
- Unknown
level: high
title: Suspicious External WebDAV Execution
id: 1ae64f96-72b6-48b3-ad3d-e71dff6c6398
related:
- id: 4c55738d-72d8-490e-a2db-7969654e375f
type: similar
status: test
description: |
Detects executables launched from external WebDAV shares using the WebDAV Explorer integration, commonly seen in initial access campaigns.
references:
- https://dear-territory-023.notion.site/WebDav-Share-Testing-e4950fa0c00149c3aa430d779b9b1d0f?pvs=4
- https://micahbabinski.medium.com/search-ms-webdav-and-chill-99c5b23ac462
- https://www.trendmicro.com/en_no/research/24/b/cve202421412-water-hydra-targets-traders-with-windows-defender-s.html
- https://www.trellix.com/en-us/about/newsroom/stories/research/beyond-file-search-a-novel-method.html
author: Ahmed Farouk
date: 2024-05-10
tags:
- attack.initial-access
- attack.resource-development
- attack.t1584
- attack.t1566
logsource:
category: proxy
detection:
selection_webdav:
c-useragent|startswith: 'Microsoft-WebDAV-MiniRedir/'
cs-method: 'GET'
selection_execution:
c-uri|endswith:
- '.7z'
- '.bat'
- '.dat'
- '.cmd'
- '.exe'
- '.js'
- '.lnk'
- '.ps1'
- '.rar'
- '.url'
- '.vbe'
- '.vbs'
- '.zip'
filter_main_local_ips:
dst_ip|cidr:
- '127.0.0.0/8'
- '10.0.0.0/8'
- '172.16.0.0/12'
- '192.168.0.0/16'
- '169.254.0.0/16'
- '::1/128' # IPv6 loopback
- 'fe80::/10' # IPv6 link-local addresses
- 'fc00::/7' # IPv6 private addresses
condition: all of selection_* and not 1 of filter_main_*
falsepositives:
- Unknown
level: high
title: Linux HackTool Execution
id: a015e032-146d-4717-8944-7a1884122111
status: test
description: Detects known hacktool execution based on image name.
references:
- https://github.com/Gui774ume/ebpfkit
- https://github.com/pathtofile/bad-bpf
- https://github.com/carlospolop/PEASS-ng
- https://github.com/t3l3machus/hoaxshell
- https://github.com/t3l3machus/Villain
- https://github.com/HavocFramework/Havoc
- https://github.com/1N3/Sn1per
- https://github.com/Ne0nd0g/merlin
- https://github.com/Pennyw0rth/NetExec/
author: Nasreddine Bencherchali (Nextron Systems), Georg Lauenstein (sure[secure])
date: 2023-01-03
modified: 2024-09-19
tags:
- attack.execution
- attack.resource-development
- attack.t1587
logsource:
product: linux
category: process_creation
detection:
selection_c2_frameworks:
Image|endswith:
- '/crackmapexec'
- '/havoc'
- '/merlin-agent'
- '/merlinServer-Linux-x64'
- '/msfconsole'
- '/msfvenom'
- '/ps-empire server'
- '/ps-empire'
- '/sliver-client'
- '/sliver-server'
- '/Villain.py'
selection_c2_framework_cobaltstrike:
Image|contains:
- '/cobaltstrike'
- '/teamserver'
selection_scanners:
Image|endswith:
- '/autorecon'
- '/httpx'
- '/legion'
- '/naabu'
- '/netdiscover'
- '/nuclei'
- '/recon-ng'
selection_scanners_sniper:
Image|contains: '/sniper'
selection_web_enum:
Image|endswith:
- '/dirb'
- '/dirbuster'
- '/eyewitness'
- '/feroxbuster'
- '/ffuf'
- '/gobuster'
- '/wfuzz'
- '/whatweb'
selection_web_vuln:
Image|endswith:
- '/joomscan'
- '/nikto'
- '/wpscan'
selection_exploit_tools:
Image|endswith:
- '/aircrack-ng'
- '/bloodhound-python'
- '/bpfdos'
- '/ebpfki'
- '/evil-winrm'
- '/hashcat'
- '/hoaxshell.py'
- '/hydra'
- '/john'
- '/ncrack'
# default binary: https://github.com/Pennyw0rth/NetExec/releases/download/v1.0.0/nxc-ubuntu-latest
- '/nxc-ubuntu-latest'
- '/pidhide'
- '/pspy32'
- '/pspy32s'
- '/pspy64'
- '/pspy64s'
- '/setoolkit'
- '/sqlmap'
- '/writeblocker'
selection_linpeas:
# covers: all linux versions listed here: https://github.com/carlospolop/PEASS-ng/releases
Image|contains: '/linpeas'
condition: 1 of selection_*
falsepositives:
- Unlikely
level: high
title: Uncommon File Created In Office Startup Folder
id: a10a2c40-2c4d-49f8-b557-1a946bc55d9d
status: test
description: Detects the creation of a file with an uncommon extension in an Office application startup folder
references:
- https://app.any.run/tasks/d6fe6624-6ef8-485d-aa75-3d1bdda2a08c/
- http://addbalance.com/word/startup.htm
- https://answers.microsoft.com/en-us/msoffice/forum/all/document-in-word-startup-folder-doesnt-open-when/44ab0932-2917-4150-8cdc-2f2cf39e86f3
- https://en.wikipedia.org/wiki/List_of_Microsoft_Office_filename_extensions
author: frack113, Nasreddine Bencherchali (Nextron Systems)
date: 2022-06-05
modified: 2023-12-13
tags:
- attack.resource-development
- attack.t1587.001
logsource:
product: windows
category: file_event
detection:
selection_word_paths:
- TargetFilename|contains: '\Microsoft\Word\STARTUP'
- TargetFilename|contains|all:
- '\Office'
- '\Program Files'
- '\STARTUP'
filter_exclude_word_ext:
TargetFilename|endswith:
- '.docb' # Word binary document introduced in Microsoft Office 2007
- '.docm' # Word macro-enabled document; same as docx, but may contain macros and scripts
- '.docx' # Word document
- '.dotm' # Word macro-enabled template; same as dotx, but may contain macros and scripts
- '.mdb' # MS Access DB
- '.mdw' # MS Access DB
- '.pdf' # PDF documents
- '.wll' # Word add-in
- '.wwl' # Word add-in
selection_excel_paths:
- TargetFilename|contains: '\Microsoft\Excel\XLSTART'
- TargetFilename|contains|all:
- '\Office'
- '\Program Files'
- '\XLSTART'
filter_exclude_excel_ext:
TargetFilename|endswith:
- '.xll'
- '.xls'
- '.xlsm'
- '.xlsx'
- '.xlt'
- '.xltm'
- '.xlw'
filter_main_office_click_to_run:
Image|contains: ':\Program Files\Common Files\Microsoft Shared\ClickToRun\'
Image|endswith: '\OfficeClickToRun.exe'
filter_main_office_apps:
Image|contains:
- ':\Program Files\Microsoft Office\'
- ':\Program Files (x86)\Microsoft Office\'
Image|endswith:
- '\winword.exe'
- '\excel.exe'
condition: ((selection_word_paths and not filter_exclude_word_ext) or (selection_excel_paths and not filter_exclude_excel_ext)) and not 1 of filter_main_*
falsepositives:
- False positive might stem from rare extensions used by other Office utilities.
level: high
title: Potential PsExec Remote Execution
id: ea011323-7045-460b-b2d7-0f7442ea6b38
status: test
description: Detects potential psexec command that initiate execution on a remote systems via common commandline flags used by the utility
references:
- https://learn.microsoft.com/en-us/sysinternals/downloads/psexec
- https://www.poweradmin.com/paexec/
- https://www.fireeye.com/blog/threat-research/2020/10/kegtap-and-singlemalt-with-a-ransomware-chaser.html
author: Florian Roth (Nextron Systems), Nasreddine Bencherchali (Nextron Systems)
date: 2023-02-28
modified: 2025-09-01
tags:
- attack.resource-development
- attack.t1587.001
logsource:
category: process_creation
product: windows
detection:
selection:
# Accepting EULA in commandline - often used in automated attacks
CommandLine|contains|all:
- 'accepteula'
- ' -u '
- ' -p '
- ' \\\\'
filter_main_localhost:
CommandLine|contains:
- '\\\\localhost'
- '\\\\127.'
condition: selection and not 1 of filter_main_*
falsepositives:
- Unknown
level: high
title: PsExec/PAExec Escalation to LOCAL SYSTEM
id: 8834e2f7-6b4b-4f09-8906-d2276470ee23
related:
- id: 207b0396-3689-42d9-8399-4222658efc99 # Generic rule based on similar cli flags
type: similar
status: test
description: Detects suspicious commandline flags used by PsExec and PAExec to escalate a command line to LOCAL_SYSTEM rights
references:
- https://learn.microsoft.com/en-us/sysinternals/downloads/psexec
- https://www.poweradmin.com/paexec/
- https://www.fireeye.com/blog/threat-research/2020/10/kegtap-and-singlemalt-with-a-ransomware-chaser.html
author: Florian Roth (Nextron Systems), Nasreddine Bencherchali (Nextron Systems)
date: 2021-11-23
modified: 2024-03-05
tags:
- attack.resource-development
- attack.t1587.001
logsource:
category: process_creation
product: windows
detection:
selection_sys: # Escalation to LOCAL_SYSTEM
CommandLine|contains|windash:
# Note that you don't need to add the ".exe" part when using psexec/paexec
# The "-" can also be replaced with "/"
# The order of args isn't important
# "cmd" can be replaced by "powershell", "pwsh" or any other console like software
- ' -s cmd'
- ' -s -i cmd'
- ' -i -s cmd'
# Pwsh (For PowerShell 7)
- ' -s pwsh'
- ' -s -i pwsh'
- ' -i -s pwsh'
# PowerShell (For PowerShell 5)
- ' -s powershell'
- ' -s -i powershell'
- ' -i -s powershell'
selection_other:
CommandLine|contains:
- 'psexec'
- 'paexec'
- 'accepteula'
condition: all of selection_*
falsepositives:
- Admins that use PsExec or PAExec to escalate to the SYSTEM account for maintenance purposes (rare)
- Users that debug Microsoft Intune issues using the commands mentioned in the official documentation; see https://learn.microsoft.com/en-us/mem/intune/apps/intune-management-extension
level: high
title: Potential Privilege Escalation To LOCAL SYSTEM
id: 207b0396-3689-42d9-8399-4222658efc99
related:
- id: 8834e2f7-6b4b-4f09-8906-d2276470ee23 # PsExec specific rule
type: similar
status: test
description: Detects unknown program using commandline flags usually used by tools such as PsExec and PAExec to start programs with SYSTEM Privileges
references:
- https://learn.microsoft.com/en-us/sysinternals/downloads/psexec
- https://www.poweradmin.com/paexec/
- https://www.fireeye.com/blog/threat-research/2020/10/kegtap-and-singlemalt-with-a-ransomware-chaser.html
author: Florian Roth (Nextron Systems), Nasreddine Bencherchali (Nextron Systems)
date: 2021-05-22
modified: 2024-03-05
tags:
- attack.resource-development
- attack.t1587.001
logsource:
category: process_creation
product: windows
detection:
selection:
# Escalation to LOCAL_SYSTEM
CommandLine|contains|windash:
# Note that you don't need to add the ".exe" part when using psexec/paexec
# The "-" can also be replaced with "/"
# The order of args isn't important
# "cmd" can be replaced by "powershell", "pwsh" or any other console like software
- ' -s cmd'
- ' -s -i cmd'
- ' -i -s cmd'
# Pwsh (For PowerShell 7)
- ' -s pwsh'
- ' -s -i pwsh'
- ' -i -s pwsh'
# PowerShell (For PowerShell 5)
- ' -s powershell'
- ' -s -i powershell'
- ' -i -s powershell'
filter_main_exclude_coverage:
# This filter exclude strings covered by 8834e2f7-6b4b-4f09-8906-d2276470ee23
CommandLine|contains:
- 'paexec'
- 'PsExec'
- 'accepteula'
condition: selection and not 1 of filter_main_*
falsepositives:
- Weird admins that rename their tools
- Software companies that bundle PsExec/PAExec with their software and rename it, so that it is less embarrassing
level: high