
title: Active Directory Replication from Non Machine Account
author: Roberto Rodriguez @Cyb3rWard0g
date: 2019/07/26
description: Detects potential abuse of Active Directory Replication Service (ADRS)
  from a non machine account to request credentials.
detection:
  SELECTION_1:
    EventID: 4662
  SELECTION_2:
    AccessMask: '0x100'
  SELECTION_3:
    Properties:
    - '*1131f6aa-9c07-11d1-f79f-00c04fc2dcd2*'
    - '*1131f6ad-9c07-11d1-f79f-00c04fc2dcd2*'
    - '*89e95b76-444d-4c62-991a-0facbeda640c*'
  SELECTION_4:
    SubjectUserName: '*$'
  SELECTION_5:
    SubjectUserName: MSOL_*
  condition: ((SELECTION_1 and SELECTION_2 and SELECTION_3) and  not (SELECTION_4
    or SELECTION_5))
falsepositives:
- Unknown
fields:
- ComputerName
- SubjectDomainName
- SubjectUserName
id: 17d619c1-e020-4347-957e-1d1207455c93
level: critical
logsource:
  product: windows
  service: security
modified: 2020/08/23
references:
- https://threathunterplaybook.com/notebooks/windows/06_credential_access/WIN-180815210510.html
status: experimental
tags:
- attack.credential_access
- attack.t1003
- attack.t1003.006
ruletype: SIGMA
