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: Guacamole Two Users Sharing Session Anomaly
id: 1edd77db-0669-4fef-9598-165bda82826d
status: test
description: Detects suspicious session with two users present
references:
    - https://research.checkpoint.com/2020/apache-guacamole-rce/
author: Florian Roth (Nextron Systems)
date: 2020-07-03
modified: 2021-11-27
tags:
    - attack.credential-access
    - attack.t1212
logsource:
    product: linux
    service: guacamole
detection:
    selection:
        - '(2 users now present)'
    condition: selection
falsepositives:
    - Unknown
level: high

title: Kerberos Manipulation
id: f7644214-0eb0-4ace-9455-331ec4c09253
status: test
description: Detects failed Kerberos TGT issue operation. This can be a sign of manipulations of TGT messages by an attacker.
references:
    - https://learn.microsoft.com/en-us/previous-versions/windows/it-pro/windows-10/security/threat-protection/auditing/event-4771
author: Florian Roth (Nextron Systems)
date: 2017-02-10
modified: 2024-01-16
tags:
    - attack.credential-access
    - attack.t1212
logsource:
    product: windows
    service: security
detection:
    selection:
        EventID:
            - 675
            - 4768
            - 4769
            - 4771
        Status:
            - '0x9'
            - '0xA'
            - '0xB'
            - '0xF'
            - '0x10'
            - '0x11'
            - '0x13'
            - '0x14'
            - '0x1A'
            - '0x1F'
            - '0x21'
            - '0x22'
            - '0x23'
            - '0x24'
            - '0x26'
            - '0x27'
            - '0x28'
            - '0x29'
            - '0x2C'
            - '0x2D'
            - '0x2E'
            - '0x2F'
            - '0x31'
            - '0x32'
            - '0x3E'
            - '0x3F'
            - '0x40'
            - '0x41'
            - '0x43'
            - '0x44'
    condition: selection
falsepositives:
    - Faulty legacy applications
level: high

title: Suspicious NTLM Authentication on the Printer Spooler Service
id: bb76d96b-821c-47cf-944b-7ce377864492
status: test
description: Detects a privilege elevation attempt by coercing NTLM authentication on the Printer Spooler service
references:
    - https://twitter.com/med0x2e/status/1520402518685200384
    - https://github.com/elastic/detection-rules/blob/dd224fb3f81d0b4bf8593c5f02a029d647ba2b2d/rules/windows/credential_access_relay_ntlm_auth_via_http_spoolss.toml
author: Elastic (idea), Tobias Michalski (Nextron Systems)
date: 2022-05-04
modified: 2023-02-09
tags:
    - attack.privilege-escalation
    - attack.credential-access
    - attack.t1212
logsource:
    category: process_creation
    product: windows
detection:
    selection_img:
        - Image|endswith: '\rundll32.exe'
        - OriginalFileName: 'RUNDLL32.EXE'
    selection_cli:
        CommandLine|contains|all:
            - 'C:\windows\system32\davclnt.dll,DavSetCookie'
            - 'http'
        CommandLine|contains:
            - 'spoolss'
            - 'srvsvc'
            - '/print/pipe/'
    condition: all of selection_*
falsepositives:
    - Unknown
level: high