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: 2023/03/06
10tags:
11    - attack.credential_access
12    - attack.t1552.006
13logsource:
14    category: process_creation
15    product: windows
16detection:
17    selection_img:
18        - Image|endswith: '\findstr.exe'
19        - OriginalFileName: 'FINDSTR.EXE'
20    selection_cli:
21        CommandLine|contains|all:
22            - 'cpassword'
23            - '\sysvol\'
24            - '.xml'
25    condition: all of selection_*
26falsepositives:
27    - Unknown
28level: high

Related rules

to-top