{"id":"8e1cb247-6cf6-42fa-b440-3f27d57e9936","title":"Potential Persistence Via Microsoft Office Add-In","description":"Detects potential persistence activity via startup add-ins that load when Microsoft Office starts (.wll/.xll are simply .dll fit for Word or Excel).","author":"NVISO","status":"test","level":"high","date":"2020-05-11","modified":"2023-02-08","tags":["attack.persistence","attack.t1137.006"],"technique_ids":["T1137.006"],"logsource":{"category":"file_event","product":"windows"},"falsepositives":["Legitimate add-ins"],"references":["Internal Research","https://labs.withsecure.com/publications/add-in-opportunities-for-office-persistence","https://github.com/redcanaryco/atomic-red-team/blob/4ae9580a1a8772db87a1b6cdb0d03e5af231e966/atomics/T1137.006/T1137.006.md"],"source_path":"rules/windows/file/file_event/file_event_win_office_addin_persistence.yml","source_sha256":"25269f0e3c0ac9571710f2cd788d47d29f06e3e49675fe917a8e8026d77f1edc","source_url":"https://github.com/anpa1200/sigma/blob/b249e9683190cffdcaf188ccbfb90bf4759844e1/rules/windows/file/file_event/file_event_win_office_addin_persistence.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 Persistence Via Microsoft Office Add-In\nid: 8e1cb247-6cf6-42fa-b440-3f27d57e9936\nstatus: test\ndescription: Detects potential persistence activity via startup add-ins that load when Microsoft Office starts (.wll/.xll are simply .dll fit for Word or Excel).\nreferences:\n    - Internal Research\n    - https://labs.withsecure.com/publications/add-in-opportunities-for-office-persistence\n    - https://github.com/redcanaryco/atomic-red-team/blob/4ae9580a1a8772db87a1b6cdb0d03e5af231e966/atomics/T1137.006/T1137.006.md\nauthor: NVISO\ndate: 2020-05-11\nmodified: 2023-02-08\ntags:\n    - attack.persistence\n    - attack.t1137.006\nlogsource:\n    category: file_event\n    product: windows\ndetection:\n    selection_wlldropped:\n        TargetFilename|contains: '\\Microsoft\\Word\\Startup\\'\n        TargetFilename|endswith: '.wll'\n    selection_xlldropped:\n        TargetFilename|contains: '\\Microsoft\\Excel\\Startup\\'\n        TargetFilename|endswith: '.xll'\n    selection_xladropped:\n        TargetFilename|contains: 'Microsoft\\Excel\\XLSTART\\'\n        TargetFilename|endswith: '.xlam'\n    selection_generic:\n        TargetFilename|contains: '\\Microsoft\\Addins\\'\n        TargetFilename|endswith:\n            - '.xlam'\n            - '.xla'\n            - '.ppam'\n    condition: 1 of selection_*\nfalsepositives:\n    - Legitimate add-ins\nlevel: high\n","validation":"yaml_parsed_not_backend_compiled_or_live_validated","techniques":[{"key":"enterprise/T1137.006","id":"T1137.006","name":"Add-ins","page":"techniques/enterprise/T1137.006/"}],"data_path":"data/detection-rules/8e1cb247-6cf6-42fa-b440-3f27d57e9936.json","kind":"sigma"}