{"id":"ff246f56-7f24-402a-baca-b86540e3925c","title":"Microsoft 365 - User Restricted from Sending Email","description":"Detects when a Security Compliance Center reported a user who exceeded sending limits of the service policies and because of this has been restricted from sending email.","author":"austinsonger","status":"test","level":"medium","date":"2021-08-19","modified":"2022-10-09","tags":["attack.initial-access","attack.t1199"],"technique_ids":["T1199"],"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_user_restricted_from_sending_email.yml","source_sha256":"8a8d615967b8dd4aed4e78002bd39a0b30da65f96eeab804faa7a04cfb9c04cc","source_url":"https://github.com/anpa1200/sigma/blob/b249e9683190cffdcaf188ccbfb90bf4759844e1/rules/cloud/m365/threat_management/microsoft365_user_restricted_from_sending_email.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 - User Restricted from Sending Email\nid: ff246f56-7f24-402a-baca-b86540e3925c\nstatus: test\ndescription: Detects when a Security Compliance Center reported a user who exceeded sending limits of the service policies and because of this has been restricted from sending email.\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.initial-access\n    - attack.t1199\nlogsource:\n    service: threat_management\n    product: m365\ndetection:\n    selection:\n        eventSource: SecurityComplianceCenter\n        eventName: 'User restricted from sending email'\n        status: success\n    condition: selection\nfalsepositives:\n    - Unknown\nlevel: medium\n","validation":"yaml_parsed_not_backend_compiled_or_live_validated","techniques":[{"key":"enterprise/T1199","id":"T1199","name":"Trusted Relationship","page":"techniques/enterprise/T1199/"}],"data_path":"data/detection-rules/ff246f56-7f24-402a-baca-b86540e3925c.json","kind":"sigma"}