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36 lines
1.2 KiB
YAML
36 lines
1.2 KiB
YAML
title: Active Directory Replication from Non Machine Account
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id: 17d619c1-e020-4347-957e-1d1207455c93
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description: Detects potential abuse of Active Directory Replication Service (ADRS) from a non machine account to request credentials.
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status: experimental
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date: 2019/07/26
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modified: 2020/08/23
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author: Roberto Rodriguez @Cyb3rWard0g
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references:
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- https://threathunterplaybook.com/notebooks/windows/06_credential_access/WIN-180815210510.html
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tags:
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- attack.credential_access
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- attack.t1003 # an old one
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- attack.t1003.006
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logsource:
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product: windows
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service: security
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detection:
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selection:
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EventID: 4662
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AccessMask: '0x100'
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Properties|contains:
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- '1131f6aa-9c07-11d1-f79f-00c04fc2dcd2'
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- '1131f6ad-9c07-11d1-f79f-00c04fc2dcd2'
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- '89e95b76-444d-4c62-991a-0facbeda640c'
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filter:
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- SubjectUserName|endswith: '$'
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- SubjectUserName|startswith: 'MSOL_' #https://docs.microsoft.com/en-us/azure/active-directory/hybrid/reference-connect-accounts-permissions#ad-ds-connector-account
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condition: selection and not filter
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fields:
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- ComputerName
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- SubjectDomainName
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- SubjectUserName
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falsepositives:
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- Unknown
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level: critical
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