{"id":"d51694fe-484a-46ac-92d6-969e76d60d10","title":"Access To Potentially Sensitive Sysvol Files By Uncommon Applications","description":"Detects file access requests to potentially sensitive files hosted on the Windows Sysvol share.","author":"frack113","status":"test","level":"medium","date":"2023-12-21","modified":"2024-07-29","tags":["attack.credential-access","attack.t1552.006"],"technique_ids":["T1552.006"],"logsource":{"category":"file_access","product":"windows","definition":"Requirements: Microsoft-Windows-Kernel-File ETW provider"},"falsepositives":["Unknown"],"references":["https://github.com/vletoux/pingcastle"],"source_path":"rules/windows/file/file_access/file_access_win_susp_gpo_files.yml","source_sha256":"dea42aed13f7c28f07542f5eb14fcbb61a20296d10780839eaa32ca6bff631fb","source_url":"https://github.com/anpa1200/sigma/blob/b249e9683190cffdcaf188ccbfb90bf4759844e1/rules/windows/file/file_access/file_access_win_susp_gpo_files.yml","license":"Detection Rule License 1.1","license_url":"https://github.com/SigmaHQ/Detection-Rule-License/blob/main/LICENSE.Detection.Rules.md","yaml":"title: Access To Potentially Sensitive Sysvol Files By Uncommon Applications\nid: d51694fe-484a-46ac-92d6-969e76d60d10\nrelated:\n    - id: 8344c19f-a023-45ff-ad63-a01c5396aea0\n      type: derived\nstatus: test\ndescription: Detects file access requests to potentially sensitive files hosted on the Windows Sysvol share.\nreferences:\n    - https://github.com/vletoux/pingcastle\nauthor: frack113\ndate: 2023-12-21\nmodified: 2024-07-29\ntags:\n    - attack.credential-access\n    - attack.t1552.006\nlogsource:\n    category: file_access\n    product: windows\n    definition: 'Requirements: Microsoft-Windows-Kernel-File ETW provider'\ndetection:\n    selection:\n        FileName|startswith: '\\\\'\n        FileName|contains|all:\n            - '\\sysvol\\'\n            - '\\Policies\\'\n        FileName|endswith:\n            - 'audit.csv'\n            - 'Files.xml'\n            - 'GptTmpl.inf'\n            - 'groups.xml'\n            - 'Registry.pol'\n            - 'Registry.xml'\n            - 'scheduledtasks.xml'\n            - 'scripts.ini'\n            - 'services.xml'\n    filter_main_generic:\n        Image|startswith:\n            - 'C:\\Program Files (x86)\\'\n            - 'C:\\Program Files\\'\n            - 'C:\\Windows\\system32\\'\n            - 'C:\\Windows\\SysWOW64\\'\n    filter_main_explorer:\n        Image: 'C:\\Windows\\explorer.exe'\n    condition: selection and not 1 of filter_main_*\nfalsepositives:\n    - Unknown\nlevel: medium\n","validation":"yaml_parsed_not_backend_compiled_or_live_validated","techniques":[{"key":"enterprise/T1552.006","id":"T1552.006","name":"Group Policy Preferences","page":"techniques/enterprise/T1552.006/"}],"data_path":"data/detection-rules/d51694fe-484a-46ac-92d6-969e76d60d10.json","kind":"sigma"}