title: Active Directory Replication from Non Machine Account
id: 17d619c1-e020-4347-957e-1d1207455c93
status: test
description: Detects potential abuse of Active Directory Replication Service (ADRS) from a non machine account to request credentials.
references:
    - https://threathunterplaybook.com/hunts/windows/180815-ADObjectAccessReplication/notebook.html
    - https://threathunterplaybook.com/library/windows/active_directory_replication.html
    - https://threathunterplaybook.com/hunts/windows/190101-ADModDirectoryReplication/notebook.html
author: Roberto Rodriguez @Cyb3rWard0g
date: 2019-07-26
modified: 2021-11-27
tags:
    - attack.credential-access
    - attack.t1003.006
logsource:
    product: windows
    service: security
detection:
    selection:
        EventID: 4662
        AccessMask: '0x100'
        Properties|contains:
            - '1131f6aa-9c07-11d1-f79f-00c04fc2dcd2'
            - '1131f6ad-9c07-11d1-f79f-00c04fc2dcd2'
            - '89e95b76-444d-4c62-991a-0facbeda640c'
    filter:
        - SubjectUserName|endswith: '$'
        - SubjectUserName|startswith: 'MSOL_' # https://learn.microsoft.com/en-us/entra/identity/hybrid/connect/reference-connect-accounts-permissions#ad-ds-connector-account
    condition: selection and not filter
falsepositives:
    - Unknown
level: critical

title: Credential Dumping Tools Service Execution - Security
id: f0d1feba-4344-4ca9-8121-a6c97bd6df52
related:
    - id: 4976aa50-8f41-45c6-8b15-ab3fc10e79ed
      type: derived
status: test
description: Detects well-known credential dumping tools execution via service execution events
references:
    - https://www.slideshare.net/heirhabarov/hunting-for-credentials-dumping-in-windows-environment
author: Florian Roth (Nextron Systems), Teymur Kheirkhabarov, Daniil Yugoslavskiy, oscd.community
date: 2017-03-05
modified: 2022-11-29
tags:
    - attack.credential-access
    - attack.execution
    - attack.t1003.001
    - attack.t1003.002
    - attack.t1003.004
    - attack.t1003.005
    - attack.t1003.006
    - attack.t1569.002
    - attack.s0005
logsource:
    product: windows
    service: security
    definition: The 'System Security Extension' audit subcategory need to be enabled to log the EID 4697
detection:
    selection:
        EventID: 4697
        ServiceFileName|contains:
            - 'cachedump'
            - 'dumpsvc'
            - 'fgexec'
            - 'gsecdump'
            - 'mimidrv'
            - 'pwdump'
            - 'servpw'
    condition: selection
falsepositives:
    - Legitimate Administrator using credential dumping tool for password recovery
level: high

title: Credential Dumping Tools Service Execution - System
id: 4976aa50-8f41-45c6-8b15-ab3fc10e79ed
status: test
description: Detects well-known credential dumping tools execution via service execution events
references:
    - https://www.slideshare.net/heirhabarov/hunting-for-credentials-dumping-in-windows-environment
author: Florian Roth (Nextron Systems), Teymur Kheirkhabarov, Daniil Yugoslavskiy, oscd.community
date: 2017-03-05
modified: 2022-11-29
tags:
    - attack.credential-access
    - attack.execution
    - attack.t1003.001
    - attack.t1003.002
    - attack.t1003.004
    - attack.t1003.005
    - attack.t1003.006
    - attack.t1569.002
    - attack.s0005
logsource:
    product: windows
    service: system
detection:
    selection:
        Provider_Name: 'Service Control Manager'
        EventID: 7045
        ImagePath|contains:
            - 'cachedump'
            - 'dumpsvc'
            - 'fgexec'
            - 'gsecdump'
            - 'mimidrv'
            - 'pwdump'
            - 'servpw'
    condition: selection
falsepositives:
    - Legitimate Administrator using credential dumping tool for password recovery
level: high

title: HackTool - Mimikatz Execution
id: a642964e-bead-4bed-8910-1bb4d63e3b4d
status: test
description: Detection well-known mimikatz command line arguments
references:
    - https://www.slideshare.net/heirhabarov/hunting-for-credentials-dumping-in-windows-environment
    - https://tools.thehacker.recipes/mimikatz/modules
author: Teymur Kheirkhabarov, oscd.community, David ANDRE (additional keywords), Tim Shelton
date: 2019-10-22
modified: 2023-02-21
tags:
    - attack.credential-access
    - attack.t1003.001
    - attack.t1003.002
    - attack.t1003.004
    - attack.t1003.005
    - attack.t1003.006
logsource:
    category: process_creation
    product: windows
detection:
    selection_tools_name:
        CommandLine|contains:
            - 'DumpCreds'
            - 'mimikatz'
    selection_function_names: # To cover functions from modules that are not in module_names
        CommandLine|contains:
            - '::aadcookie' # misc module
            - '::detours' # misc module
            - '::memssp' # misc module
            - '::mflt' # misc module
            - '::ncroutemon' # misc module
            - '::ngcsign' # misc module
            - '::printnightmare' # misc module
            - '::skeleton' # misc module
            - '::preshutdown'  # service module
            - '::mstsc'  # ts module
            - '::multirdp'  # ts module
    selection_module_names:
        CommandLine|contains:
            - 'rpc::'
            - 'token::'
            - 'crypto::'
            - 'dpapi::'
            - 'sekurlsa::'
            - 'kerberos::'
            - 'lsadump::'
            - 'privilege::'
            - 'process::'
            - 'vault::'
    condition: 1 of selection_*
falsepositives:
    - Unlikely
level: high

title: Mimikatz DC Sync
id: 611eab06-a145-4dfa-a295-3ccc5c20f59a
status: test
description: Detects Mimikatz DC sync security events
references:
    - https://twitter.com/gentilkiwi/status/1003236624925413376
    - https://gist.github.com/gentilkiwi/dcc132457408cf11ad2061340dcb53c2
    - https://blog.blacklanternsecurity.com/p/detecting-dcsync?s=r
    - https://learn.microsoft.com/en-us/previous-versions/windows/it-pro/windows-10/security/threat-protection/auditing/event-4662
author: Benjamin Delpy, Florian Roth (Nextron Systems), Scott Dermott, Sorina Ionescu
date: 2018-06-03
modified: 2022-04-26
tags:
    - attack.credential-access
    - attack.s0002
    - attack.t1003.006
logsource:
    product: windows
    service: security
detection:
    selection:
        EventID: 4662
        Properties|contains:
            - 'Replicating Directory Changes All'
            - '1131f6ad-9c07-11d1-f79f-00c04fc2dcd2'
            - '1131f6aa-9c07-11d1-f79f-00c04fc2dcd2'
            - '9923a32a-3607-11d2-b9be-0000f87a36b2'
            - '89e95b76-444d-4c62-991a-0facbeda640c'
        AccessMask: '0x100'
    filter1:
        SubjectDomainName: 'Window Manager'
    filter2:
        SubjectUserName|startswith:
            - 'NT AUT'
            - 'MSOL_'
    filter3:
        SubjectUserName|endswith: '$'
    condition: selection and not 1 of filter*
falsepositives:
    - Valid DC Sync that is not covered by the filters; please report
    - Local Domain Admin account used for Azure AD Connect
level: high

title: Mimikatz Use
id: 06d71506-7beb-4f22-8888-e2e5e2ca7fd8
status: test
description: This method detects mimikatz keywords in different Eventlogs (some of them only appear in older Mimikatz version that are however still used by different threat groups)
references:
    - https://tools.thehacker.recipes/mimikatz/modules
author: Florian Roth (Nextron Systems), David ANDRE (additional keywords)
date: 2017-01-10
modified: 2022-01-05
tags:
    - attack.s0002
    - attack.lateral-movement
    - attack.credential-access
    - car.2013-07-001
    - car.2019-04-004
    - attack.t1003.002
    - attack.t1003.004
    - attack.t1003.001
    - attack.t1003.006
logsource:
    product: windows
detection:
    keywords:
        - 'dpapi::masterkey'
        - 'eo.oe.kiwi'
        - 'event::clear'
        - 'event::drop'
        - 'gentilkiwi.com'
        - 'kerberos::golden'
        - 'kerberos::ptc'
        - 'kerberos::ptt'
        - 'kerberos::tgt'
        - 'Kiwi Legit Printer'
        - 'lsadump::'
        - 'mimidrv.sys'
        - '\mimilib.dll'
        - 'misc::printnightmare'
        - 'misc::shadowcopies'
        - 'misc::skeleton'
        - 'privilege::backup'
        - 'privilege::debug'
        - 'privilege::driver'
        - 'sekurlsa::'
    filter:
        EventID: 15  # Sysmon's FileStream Events (could cause false positives when Sigma rules get copied on/to a system)
    condition: keywords and not filter
falsepositives:
    - Naughty administrators
    - AV Signature updates
    - Files with Mimikatz in their filename
level: high

title: Suspicious Get-ADReplAccount
id: 060c3ef1-fd0a-4091-bf46-e7d625f60b73
status: test
description: |
    The DSInternals PowerShell Module exposes several internal features of Active Directory and Azure Active Directory.
    These include FIDO2 and NGC key auditing, offline ntds.dit file manipulation, password auditing, DC recovery from IFM backups and password hash calculation.
references:
    - https://www.powershellgallery.com/packages/DSInternals
    - https://github.com/redcanaryco/atomic-red-team/blob/f339e7da7d05f6057fdfcdd3742bfcf365fee2a9/atomics/T1003.006/T1003.006.md#atomic-test-2---run-dsinternals-get-adreplaccount
author: frack113
date: 2022-02-06
tags:
    - attack.credential-access
    - attack.t1003.006
logsource:
    product: windows
    category: ps_script
    definition: 'Requirements: Script Block Logging must be enabled'
detection:
    selection:
        ScriptBlockText|contains|all:
            - Get-ADReplAccount
            - '-All '
            - '-Server '
    condition: selection
falsepositives:
    - Legitimate PowerShell scripts
level: medium