{"id":"4ede543c-e098-43d9-a28f-dd784a13132f","title":"WinRAR Execution in Non-Standard Folder","description":"Detects a suspicious WinRAR execution in a folder which is not the default installation folder","author":"Florian Roth (Nextron Systems), Tigzy","status":"test","level":"medium","date":"2021-11-17","modified":"2025-07-16","tags":["attack.collection","attack.t1560.001"],"technique_ids":["T1560.001"],"logsource":{"category":"process_creation","product":"windows"},"falsepositives":["Legitimate use of WinRAR in a folder of a software that bundles WinRAR"],"references":["https://twitter.com/cyb3rops/status/1460978167628406785"],"source_path":"rules/windows/process_creation/proc_creation_win_winrar_uncommon_folder_execution.yml","source_sha256":"ca5cd0e07f84a53d8706579fbdb6a1baf8a621847d57a8d66bb6a3412c8d2254","source_url":"https://github.com/anpa1200/sigma/blob/b249e9683190cffdcaf188ccbfb90bf4759844e1/rules/windows/process_creation/proc_creation_win_winrar_uncommon_folder_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: WinRAR Execution in Non-Standard Folder\nid: 4ede543c-e098-43d9-a28f-dd784a13132f\nstatus: test\ndescription: Detects a suspicious WinRAR execution in a folder which is not the default installation folder\nreferences:\n    - https://twitter.com/cyb3rops/status/1460978167628406785\nauthor: Florian Roth (Nextron Systems), Tigzy\ndate: 2021-11-17\nmodified: 2025-07-16\ntags:\n    - attack.collection\n    - attack.t1560.001\nlogsource:\n    category: process_creation\n    product: windows\ndetection:\n    selection:\n        - Image|endswith:\n              - '\\rar.exe'\n              - '\\winrar.exe'\n        - Description:\n              - 'Command line RAR'\n              - 'WinRAR'\n    filter_main_unrar:\n        # Note: we filter unrar as it has the same description as the other utilities, and we're only interested in compression\n        Image|endswith: '\\UnRAR.exe'\n    filter_main_path:\n        Image|contains:\n            - ':\\Program Files (x86)\\WinRAR\\'\n            - ':\\Program Files\\WinRAR\\'\n    filter_optional_temp:\n        # Note: in some occasion installers were seen dropping \"rar\" in TEMP\n        Image|contains: ':\\Windows\\Temp\\'\n    condition: selection and not 1 of filter_main_* and not 1 of filter_optional_*\nfalsepositives:\n    - Legitimate use of WinRAR in a folder of a software that bundles WinRAR\nlevel: medium\n","validation":"yaml_parsed_not_backend_compiled_or_live_validated","techniques":[{"key":"enterprise/T1560.001","id":"T1560.001","name":"Archive via Utility","page":"techniques/enterprise/T1560.001/"}],"data_path":"data/detection-rules/4ede543c-e098-43d9-a28f-dd784a13132f.json","kind":"sigma"}