{"id":"8366030e-7216-476b-9927-271d79f13cf3","title":"Azure Unusual Authentication Interruption","description":"Detects when there is a interruption in the authentication process.","author":"Austin Songer @austinsonger","status":"test","level":"medium","date":"2021-11-26","modified":"2022-12-18","tags":["attack.privilege-escalation","attack.persistence","attack.initial-access","attack.stealth","attack.t1078"],"technique_ids":["T1078"],"logsource":{"product":"azure","service":"signinlogs"},"falsepositives":["Unknown"],"references":["https://learn.microsoft.com/en-us/entra/architecture/security-operations-privileged-accounts"],"source_path":"rules/cloud/azure/signin_logs/azure_unusual_authentication_interruption.yml","source_sha256":"45951dd2df45832ed04b221018bddc2376e0153ccf9f902bd759aadbef8f5781","source_url":"https://github.com/anpa1200/sigma/blob/b249e9683190cffdcaf188ccbfb90bf4759844e1/rules/cloud/azure/signin_logs/azure_unusual_authentication_interruption.yml","license":"Detection Rule License 1.1","license_url":"https://github.com/SigmaHQ/Detection-Rule-License/blob/main/LICENSE.Detection.Rules.md","yaml":"title: Azure Unusual Authentication Interruption\nid: 8366030e-7216-476b-9927-271d79f13cf3\nstatus: test\ndescription: Detects when there is a interruption in the authentication process.\nreferences:\n    - https://learn.microsoft.com/en-us/entra/architecture/security-operations-privileged-accounts\nauthor: Austin Songer @austinsonger\ndate: 2021-11-26\nmodified: 2022-12-18\ntags:\n    - attack.privilege-escalation\n    - attack.persistence\n    - attack.initial-access\n    - attack.stealth\n    - attack.t1078\nlogsource:\n    product: azure\n    service: signinlogs\ndetection:\n    selection_50097:\n        ResultType: 50097\n        ResultDescription: 'Device authentication is required'\n    selection_50155:\n        ResultType: 50155\n        ResultDescription: 'DeviceAuthenticationFailed'\n    selection_50158:\n        ResultType: 50158\n        ResultDescription: 'ExternalSecurityChallenge - External security challenge was not satisfied'\n    condition: 1 of selection_*\nfalsepositives:\n    - Unknown\nlevel: medium\n","validation":"yaml_parsed_not_backend_compiled_or_live_validated","techniques":[{"key":"enterprise/T1078","id":"T1078","name":"Valid Accounts","page":"techniques/enterprise/T1078/"}],"data_path":"data/detection-rules/8366030e-7216-476b-9927-271d79f13cf3.json","kind":"sigma"}