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