{"id":"c3edc6a5-d9d4-48d8-930e-aab518390917","title":"Potential Persistence Via Outlook Form","description":"Detects the creation of a new Outlook form which can contain malicious code","author":"Tobias Michalski (Nextron Systems)","status":"test","level":"high","date":"2021-06-10","modified":"2023-02-22","tags":["attack.persistence","attack.t1137.003"],"technique_ids":["T1137.003"],"logsource":{"product":"windows","category":"file_event"},"falsepositives":["Legitimate use of outlook forms"],"references":["https://speakerdeck.com/heirhabarov/hunting-for-persistence-via-microsoft-exchange-server-or-outlook?slide=76","https://speakerdeck.com/heirhabarov/hunting-for-persistence-via-microsoft-exchange-server-or-outlook?slide=79","https://learn.microsoft.com/en-us/office/vba/outlook/concepts/outlook-forms/create-an-outlook-form","https://www.slipstick.com/developer/custom-form/clean-outlooks-forms-cache/"],"source_path":"rules/windows/file/file_event/file_event_win_office_outlook_newform.yml","source_sha256":"6bb5da8f596d3f210aa7171d5b0e914d683021dcc1f9f86df66ff26132745acc","source_url":"https://github.com/anpa1200/sigma/blob/b249e9683190cffdcaf188ccbfb90bf4759844e1/rules/windows/file/file_event/file_event_win_office_outlook_newform.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 Outlook Form\nid: c3edc6a5-d9d4-48d8-930e-aab518390917\nstatus: test\ndescription: Detects the creation of a new Outlook form which can contain malicious code\nreferences:\n    - https://speakerdeck.com/heirhabarov/hunting-for-persistence-via-microsoft-exchange-server-or-outlook?slide=76\n    - https://speakerdeck.com/heirhabarov/hunting-for-persistence-via-microsoft-exchange-server-or-outlook?slide=79\n    - https://learn.microsoft.com/en-us/office/vba/outlook/concepts/outlook-forms/create-an-outlook-form\n    - https://www.slipstick.com/developer/custom-form/clean-outlooks-forms-cache/\nauthor: Tobias Michalski (Nextron Systems)\ndate: 2021-06-10\nmodified: 2023-02-22\ntags:\n    - attack.persistence\n    - attack.t1137.003\nlogsource:\n    product: windows\n    category: file_event\ndetection:\n    selection:\n        Image|endswith: '\\outlook.exe'\n        TargetFilename|contains:\n            - '\\AppData\\Local\\Microsoft\\FORMS\\IPM'\n            - '\\Local Settings\\Application Data\\Microsoft\\Forms' # Windows XP\n    condition: selection\nfalsepositives:\n    - Legitimate use of outlook forms\nlevel: high\n","validation":"yaml_parsed_not_backend_compiled_or_live_validated","techniques":[{"key":"enterprise/T1137.003","id":"T1137.003","name":"Outlook Forms","page":"techniques/enterprise/T1137.003/"}],"data_path":"data/detection-rules/c3edc6a5-d9d4-48d8-930e-aab518390917.json","kind":"sigma"}