Findstr GPP Passwords

Look for the encrypted cpassword value within Group Policy Preference files on the Domain Controller. This value can be decrypted with gpp-decrypt.

Sigma rule (View on GitHub)

 1title: Findstr GPP Passwords
 2id: 91a2c315-9ee6-4052-a853-6f6a8238f90d
 3status: test
 4description: Look for the encrypted cpassword value within Group Policy Preference files on the Domain Controller. This value can be decrypted with gpp-decrypt.
 5references:
 6    - https://github.com/redcanaryco/atomic-red-team/blob/f339e7da7d05f6057fdfcdd3742bfcf365fee2a9/atomics/T1552.006/T1552.006.md#atomic-test-1---gpp-passwords-findstr
 7author: frack113
 8date: 2021-12-27
 9modified: 2023-11-11
10tags:
11    - attack.credential-access
12    - attack.t1552.006
13logsource:
14    category: process_creation
15    product: windows
16detection:
17    selection_img:
18        - Image|endswith:
19              - '\find.exe'
20              - '\findstr.exe'
21        - OriginalFileName:
22              - 'FIND.EXE'
23              - 'FINDSTR.EXE'
24    selection_cli:
25        CommandLine|contains|all:
26            - 'cpassword'
27            - '\sysvol\'
28            - '.xml'
29    condition: all of selection_*
30falsepositives:
31    - Unknown
32level: high

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