{"id":"77df53a5-1d78-4f32-bc5a-0e7465bd8f41","title":"Portable Gpg.EXE Execution","description":"Detects the execution of \"gpg.exe\" from uncommon location. Often used by ransomware and loaders to decrypt/encrypt data.","author":"frack113, Nasreddine Bencherchali (Nextron Systems)","status":"test","level":"medium","date":"2023-08-06","modified":"2023-11-10","tags":["attack.impact","attack.t1486"],"technique_ids":["T1486"],"logsource":{"category":"process_creation","product":"windows"},"falsepositives":[],"references":["https://www.trendmicro.com/vinfo/vn/threat-encyclopedia/malware/ransom.bat.zarlock.a","https://securelist.com/locked-out/68960/","https://github.com/redcanaryco/atomic-red-team/blob/c4097dc7ed14d7f7d08c89d148c4307097e8c294/atomics/T1486/T1486.md"],"source_path":"rules/windows/process_creation/proc_creation_win_gpg4win_portable_execution.yml","source_sha256":"3f2148a176c2ec8cff3b2755468fe0022dc4aa08e562b9114573e4f6fbab8bc5","source_url":"https://github.com/anpa1200/sigma/blob/b249e9683190cffdcaf188ccbfb90bf4759844e1/rules/windows/process_creation/proc_creation_win_gpg4win_portable_execution.yml","license":"Detection Rule License 1.1","license_url":"https://github.com/SigmaHQ/Detection-Rule-License/blob/main/LICENSE.Detection.Rules.md","yaml":"title: Portable Gpg.EXE Execution\nid: 77df53a5-1d78-4f32-bc5a-0e7465bd8f41\nstatus: test\ndescription: Detects the execution of \"gpg.exe\" from uncommon location. Often used by ransomware and loaders to decrypt/encrypt data.\nreferences:\n    - https://www.trendmicro.com/vinfo/vn/threat-encyclopedia/malware/ransom.bat.zarlock.a\n    - https://securelist.com/locked-out/68960/\n    - https://github.com/redcanaryco/atomic-red-team/blob/c4097dc7ed14d7f7d08c89d148c4307097e8c294/atomics/T1486/T1486.md\nauthor: frack113, Nasreddine Bencherchali (Nextron Systems)\ndate: 2023-08-06\nmodified: 2023-11-10\ntags:\n    - attack.impact\n    - attack.t1486\nlogsource:\n    category: process_creation\n    product: windows\ndetection:\n    selection:\n        - Image|endswith:\n              - '\\gpg.exe'\n              - '\\gpg2.exe'\n        - OriginalFileName: 'gpg.exe'\n        - Description: 'GnuPG’s OpenPGP tool'\n    filter_main_legit_location:\n        Image|contains:\n            - ':\\Program Files (x86)\\GNU\\GnuPG\\bin\\'\n            - ':\\Program Files (x86)\\GnuPG VS-Desktop\\'\n            - ':\\Program Files (x86)\\GnuPG\\bin\\'\n            - ':\\Program Files (x86)\\Gpg4win\\bin\\'\n    condition: selection and not 1 of filter_main_*\nlevel: medium\n","validation":"yaml_parsed_not_backend_compiled_or_live_validated","techniques":[{"key":"enterprise/T1486","id":"T1486","name":"Data Encrypted for Impact","page":"techniques/enterprise/T1486/"}],"data_path":"data/detection-rules/77df53a5-1d78-4f32-bc5a-0e7465bd8f41.json","kind":"sigma"}