{"id":"d8b0a4fe-07a8-41be-bd39-b14afa025d95","title":"Activity from Anonymous IP Addresses","description":"Detects when a Microsoft Cloud App Security reported when users were active from an IP address that has been identified as an anonymous proxy IP address.","author":"Austin Songer @austinsonger","status":"test","level":"medium","date":"2021-08-23","modified":"2022-10-09","tags":["attack.command-and-control","attack.t1573"],"technique_ids":["T1573"],"logsource":{"service":"threat_management","product":"m365"},"falsepositives":["User using a VPN or Proxy"],"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_activity_from_anonymous_ip_addresses.yml","source_sha256":"3279465203c56b1ec7e2b972655cc5064e43ebf9f95f769f60385e43283808e2","source_url":"https://github.com/anpa1200/sigma/blob/b249e9683190cffdcaf188ccbfb90bf4759844e1/rules/cloud/m365/threat_management/microsoft365_activity_from_anonymous_ip_addresses.yml","license":"Detection Rule License 1.1","license_url":"https://github.com/SigmaHQ/Detection-Rule-License/blob/main/LICENSE.Detection.Rules.md","yaml":"title: Activity from Anonymous IP Addresses\nid: d8b0a4fe-07a8-41be-bd39-b14afa025d95\nstatus: test\ndescription: Detects when a Microsoft Cloud App Security reported when users were active from an IP address that has been identified as an anonymous proxy IP address.\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: Austin Songer @austinsonger\ndate: 2021-08-23\nmodified: 2022-10-09\ntags:\n    - attack.command-and-control\n    - attack.t1573\nlogsource:\n    service: threat_management\n    product: m365\ndetection:\n    selection:\n        eventSource: SecurityComplianceCenter\n        eventName: 'Activity from anonymous IP addresses'\n        status: success\n    condition: selection\nfalsepositives:\n    - User using a VPN or Proxy\nlevel: medium\n","validation":"yaml_parsed_not_backend_compiled_or_live_validated","techniques":[{"key":"enterprise/T1573","id":"T1573","name":"Encrypted Channel","page":"techniques/enterprise/T1573/"}],"data_path":"data/detection-rules/d8b0a4fe-07a8-41be-bd39-b14afa025d95.json","kind":"sigma"}