Detectionmediumtest

Portable Gpg.EXE Execution

Detects the execution of "gpg.exe" from uncommon location. Often used by ransomware and loaders to decrypt/encrypt data.

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François Hubaut, Nasreddine Bencherchali (Nextron Systems)Created Sun Aug 06Updated Fri Nov 1077df53a5-1d78-4f32-bc5a-0e7465bd8f41windows

Log Source

WindowsProcess Creation

ProductWindows← raw: windows

CategoryProcess Creation← raw: process_creation

Events generated when a new process is spawned on the system. Covers command-line arguments, parent/child relationships, and process metadata.

Detection Logic

detection:
    selection:
        - Image|endswith:
              - '\gpg.exe'
              - '\gpg2.exe'
        - OriginalFileName: 'gpg.exe'
        - Description: 'GnuPG’s OpenPGP tool'
    filter_main_legit_location:
        Image|contains:
            - ':\Program Files (x86)\GNU\GnuPG\bin\'
            - ':\Program Files (x86)\GnuPG VS-Desktop\'
            - ':\Program Files (x86)\GnuPG\bin\'
            - ':\Program Files (x86)\Gpg4win\bin\'
    condition: selection and not 1 of filter_main_*