{"id":"4ae3e30b-b03f-43aa-87e3-b622f4048eed","title":"Potential Arbitrary File Download Using Office Application","description":"Detects potential arbitrary file download using a Microsoft Office application","author":"Nasreddine Bencherchali (Nextron Systems), Beyu Denis, oscd.community","status":"test","level":"high","date":"2022-05-17","modified":"2023-06-22","tags":["attack.stealth","attack.t1202"],"technique_ids":["T1202"],"logsource":{"category":"process_creation","product":"windows"},"falsepositives":["Unknown"],"references":["https://lolbas-project.github.io/lolbas/OtherMSBinaries/Winword/","https://lolbas-project.github.io/lolbas/OtherMSBinaries/Powerpnt/","https://lolbas-project.github.io/lolbas/OtherMSBinaries/Excel/","https://medium.com/@reegun/unsanitized-file-validation-leads-to-malicious-payload-download-via-office-binaries-202d02db7191"],"source_path":"rules/windows/process_creation/proc_creation_win_office_arbitrary_cli_download.yml","source_sha256":"a39760c54ac4383232160b337eacc5882f9fc34345b2d4a10557fa176edbf8a7","source_url":"https://github.com/anpa1200/sigma/blob/b249e9683190cffdcaf188ccbfb90bf4759844e1/rules/windows/process_creation/proc_creation_win_office_arbitrary_cli_download.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 Arbitrary File Download Using Office Application\nid: 4ae3e30b-b03f-43aa-87e3-b622f4048eed\nrelated:\n    - id: 0c79148b-118e-472b-bdb7-9b57b444cc19\n      type: obsolete\nstatus: test\ndescription: Detects potential arbitrary file download using a Microsoft Office application\nreferences:\n    - https://lolbas-project.github.io/lolbas/OtherMSBinaries/Winword/\n    - https://lolbas-project.github.io/lolbas/OtherMSBinaries/Powerpnt/\n    - https://lolbas-project.github.io/lolbas/OtherMSBinaries/Excel/\n    - https://medium.com/@reegun/unsanitized-file-validation-leads-to-malicious-payload-download-via-office-binaries-202d02db7191\nauthor: Nasreddine Bencherchali (Nextron Systems), Beyu Denis, oscd.community\ndate: 2022-05-17\nmodified: 2023-06-22\ntags:\n    - attack.stealth\n    - attack.t1202\nlogsource:\n    category: process_creation\n    product: windows\ndetection:\n    selection_img:\n        - Image|endswith:\n              - '\\EXCEL.EXE'\n              - '\\POWERPNT.EXE'\n              - '\\WINWORD.exe'\n        - OriginalFileName:\n              - 'Excel.exe'\n              - 'POWERPNT.EXE'\n              - 'WinWord.exe'\n    selection_http:\n        CommandLine|contains:\n            - 'http://'\n            - 'https://'\n    condition: all of selection_*\nfalsepositives:\n    - Unknown\nlevel: high\n","validation":"yaml_parsed_not_backend_compiled_or_live_validated","techniques":[{"key":"enterprise/T1202","id":"T1202","name":"Indirect Command Execution","page":"techniques/enterprise/T1202/"}],"data_path":"data/detection-rules/4ae3e30b-b03f-43aa-87e3-b622f4048eed.json","kind":"sigma"}