{"id":"a3f55ebd-0c01-4ed6-adc0-8fb76d8cd3cd","title":"Malicious IP Address Sign-In Failure Rate","description":"Indicates sign-in from a malicious IP address based on high failure rates.","author":"Mark Morowczynski '@markmorow', Gloria Lee, '@gleeiamglo'","status":"test","level":"high","date":"2023-09-07","modified":"","tags":["attack.t1090","attack.command-and-control"],"technique_ids":["T1090"],"logsource":{"product":"azure","service":"riskdetection"},"falsepositives":["We recommend investigating the sessions flagged by this detection in the context of other sign-ins from the user."],"references":["https://learn.microsoft.com/en-us/entra/id-protection/concept-identity-protection-risks#malicious-ip-address","https://learn.microsoft.com/en-us/entra/architecture/security-operations-user-accounts#unusual-sign-ins"],"source_path":"rules/cloud/azure/identity_protection/azure_identity_protection_malicious_ip_address.yml","source_sha256":"306495f109bc68bf67a05173a2baa1e1e6ac50ce6c2948688c9999c6977a4437","source_url":"https://github.com/anpa1200/sigma/blob/b249e9683190cffdcaf188ccbfb90bf4759844e1/rules/cloud/azure/identity_protection/azure_identity_protection_malicious_ip_address.yml","license":"Detection Rule License 1.1","license_url":"https://github.com/SigmaHQ/Detection-Rule-License/blob/main/LICENSE.Detection.Rules.md","yaml":"title: Malicious IP Address Sign-In Failure Rate\nid: a3f55ebd-0c01-4ed6-adc0-8fb76d8cd3cd\nstatus: test\ndescription: Indicates sign-in from a malicious IP address based on high failure rates.\nreferences:\n    - https://learn.microsoft.com/en-us/entra/id-protection/concept-identity-protection-risks#malicious-ip-address\n    - https://learn.microsoft.com/en-us/entra/architecture/security-operations-user-accounts#unusual-sign-ins\nauthor: Mark Morowczynski '@markmorow', Gloria Lee, '@gleeiamglo'\ndate: 2023-09-07\ntags:\n    - attack.t1090\n    - attack.command-and-control\nlogsource:\n    product: azure\n    service: riskdetection\ndetection:\n    selection:\n        riskEventType: 'maliciousIPAddress'\n    condition: selection\nfalsepositives:\n    - We recommend investigating the sessions flagged by this detection in the context of other sign-ins from the user.\nlevel: high\n","validation":"yaml_parsed_not_backend_compiled_or_live_validated","techniques":[{"key":"enterprise/T1090","id":"T1090","name":"Proxy","page":"techniques/enterprise/T1090/"}],"data_path":"data/detection-rules/a3f55ebd-0c01-4ed6-adc0-8fb76d8cd3cd.json","kind":"sigma"}