{"id":"78a34b67-3c39-4886-8fb4-61c46dc18ecd","title":"Microsoft 365 - Unusual Volume of File Deletion","description":"Detects when a Microsoft Cloud App Security reported a user has deleted a unusual a large volume of files.","author":"austinsonger","status":"test","level":"medium","date":"2021-08-19","modified":"2022-10-09","tags":["attack.impact","attack.t1485"],"technique_ids":["T1485"],"logsource":{"service":"threat_management","product":"m365"},"falsepositives":["Unknown"],"references":["https://learn.microsoft.com/en-us/defender-cloud-apps/anomaly-detection-policy","https://learn.microsoft.com/en-us/defender-cloud-apps/policy-template-reference"],"source_path":"rules/cloud/m365/threat_management/microsoft365_unusual_volume_of_file_deletion.yml","source_sha256":"0121f896166419e55720a4ffcc2911cdc5aa5d5092700336ac5b472375cdefe5","source_url":"https://github.com/anpa1200/sigma/blob/b249e9683190cffdcaf188ccbfb90bf4759844e1/rules/cloud/m365/threat_management/microsoft365_unusual_volume_of_file_deletion.yml","license":"Detection Rule License 1.1","license_url":"https://github.com/SigmaHQ/Detection-Rule-License/blob/main/LICENSE.Detection.Rules.md","yaml":"title: Microsoft 365 - Unusual Volume of File Deletion\nid: 78a34b67-3c39-4886-8fb4-61c46dc18ecd\nstatus: test\ndescription: Detects when a Microsoft Cloud App Security reported a user has deleted a unusual a large volume of files.\nreferences:\n    - https://learn.microsoft.com/en-us/defender-cloud-apps/anomaly-detection-policy\n    - https://learn.microsoft.com/en-us/defender-cloud-apps/policy-template-reference\nauthor: austinsonger\ndate: 2021-08-19\nmodified: 2022-10-09\ntags:\n    - attack.impact\n    - attack.t1485\nlogsource:\n    service: threat_management\n    product: m365\ndetection:\n    selection:\n        eventSource: SecurityComplianceCenter\n        eventName: 'Unusual volume of file deletion'\n        status: success\n    condition: selection\nfalsepositives:\n    - Unknown\nlevel: medium\n","validation":"yaml_parsed_not_backend_compiled_or_live_validated","techniques":[{"key":"enterprise/T1485","id":"T1485","name":"Data Destruction","page":"techniques/enterprise/T1485/"}],"data_path":"data/detection-rules/78a34b67-3c39-4886-8fb4-61c46dc18ecd.json","kind":"sigma"}