{"id":"1327381e-6ab0-4f38-b583-4c1b8346a56b","title":"Potential Command Line Path Traversal Evasion Attempt","description":"Detects potential evasion or obfuscation attempts using bogus path traversal via the commandline","author":"Christian Burkard (Nextron Systems)","status":"test","level":"medium","date":"2021-10-26","modified":"2023-03-29","tags":["attack.stealth","attack.t1036"],"technique_ids":["T1036"],"logsource":{"category":"process_creation","product":"windows"},"falsepositives":["Google Drive","Citrix"],"references":["https://twitter.com/hexacorn/status/1448037865435320323","https://twitter.com/Gal_B1t/status/1062971006078345217"],"source_path":"rules/windows/process_creation/proc_creation_win_susp_commandline_path_traversal_evasion.yml","source_sha256":"9c8ebfdde8b3438dd1e828c090ee3e70c47f7082cdcb09141bf978dbcb09d12c","source_url":"https://github.com/anpa1200/sigma/blob/b249e9683190cffdcaf188ccbfb90bf4759844e1/rules/windows/process_creation/proc_creation_win_susp_commandline_path_traversal_evasion.yml","license":"Detection Rule License 1.1","license_url":"https://github.com/SigmaHQ/Detection-Rule-License/blob/main/LICENSE.Detection.Rules.md","yaml":"title: Potential Command Line Path Traversal Evasion Attempt\nid: 1327381e-6ab0-4f38-b583-4c1b8346a56b\nstatus: test\ndescription: Detects potential evasion or obfuscation attempts using bogus path traversal via the commandline\nreferences:\n    - https://twitter.com/hexacorn/status/1448037865435320323\n    - https://twitter.com/Gal_B1t/status/1062971006078345217\nauthor: Christian Burkard (Nextron Systems)\ndate: 2021-10-26\nmodified: 2023-03-29\ntags:\n    - attack.stealth\n    - attack.t1036\nlogsource:\n    category: process_creation\n    product: windows\ndetection:\n    selection_1:\n        Image|contains: '\\Windows\\'\n        CommandLine|contains:\n            - '\\..\\Windows\\'\n            - '\\..\\System32\\'\n            - '\\..\\..\\'\n    selection_2:\n        CommandLine|contains: '.exe\\..\\'\n    filter_optional_google_drive:\n        CommandLine|contains: '\\Google\\Drive\\googledrivesync.exe\\..\\'\n    filter_optional_citrix:\n        CommandLine|contains: '\\Citrix\\Virtual Smart Card\\Citrix.Authentication.VirtualSmartcard.Launcher.exe\\..\\'\n    condition: 1 of selection_* and not 1 of filter_optional_*\nfalsepositives:\n    - Google Drive\n    - Citrix\nlevel: medium\n","validation":"yaml_parsed_not_backend_compiled_or_live_validated","techniques":[{"key":"enterprise/T1036","id":"T1036","name":"Masquerading","page":"techniques/enterprise/T1036/"}],"data_path":"data/detection-rules/1327381e-6ab0-4f38-b583-4c1b8346a56b.json","kind":"sigma"}