{"id":"bd132164-884a-48f1-aa2d-c6d646b04c69","title":"Microsoft 365 - Potential Ransomware Activity","description":"Detects when a Microsoft Cloud App Security reported when a user uploads files to the cloud that might be infected with ransomware.","author":"austinsonger","status":"test","level":"medium","date":"2021-08-19","modified":"2022-10-09","tags":["attack.impact","attack.t1486"],"technique_ids":["T1486"],"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_potential_ransomware_activity.yml","source_sha256":"0f49f02a6b499404bd26542317b846b55cd6372d0d0283bdb49f64069034cc0b","source_url":"https://github.com/anpa1200/sigma/blob/b249e9683190cffdcaf188ccbfb90bf4759844e1/rules/cloud/m365/threat_management/microsoft365_potential_ransomware_activity.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 - Potential Ransomware Activity\nid: bd132164-884a-48f1-aa2d-c6d646b04c69\nstatus: test\ndescription: Detects when a Microsoft Cloud App Security reported when a user uploads files to the cloud that might be infected with ransomware.\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.t1486\nlogsource:\n    service: threat_management\n    product: m365\ndetection:\n    selection:\n        eventSource: SecurityComplianceCenter\n        eventName: 'Potential ransomware activity'\n        status: success\n    condition: selection\nfalsepositives:\n    - Unknown\nlevel: medium\n","validation":"yaml_parsed_not_backend_compiled_or_live_validated","techniques":[{"key":"enterprise/T1486","id":"T1486","name":"Data Encrypted for Impact","page":"techniques/enterprise/T1486/"}],"data_path":"data/detection-rules/bd132164-884a-48f1-aa2d-c6d646b04c69.json","kind":"sigma"}