Renamed Gpg.EXE Execution

Detects the execution of a renamed "gpg.exe". Often used by ransomware and loaders to decrypt/encrypt data.

Sigma rule (View on GitHub)

 1title: Renamed Gpg.EXE Execution
 2id: ec0722a3-eb5c-4a56-8ab2-bf6f20708592
 3status: test
 4description: Detects the execution of a renamed "gpg.exe". Often used by ransomware and loaders to decrypt/encrypt data.
 5references:
 6    - https://securelist.com/locked-out/68960/
 7author: Nasreddine Bencherchali (Nextron Systems), frack113
 8date: 2023/08/09
 9tags:
10    - attack.impact
11    - attack.t1486
12logsource:
13    category: process_creation
14    product: windows
15detection:
16    selection:
17        OriginalFileName: 'gpg.exe'
18    filter_main_img:
19        Image|endswith:
20            - '\gpg.exe'
21            - '\gpg2.exe'
22    condition: selection and not 1 of filter_main_*
23level: high

References

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