{"id":"128faeef-79dd-44ca-b43c-a9e236a60f49","title":"Unfamiliar Sign-In Properties","description":"Detects sign-in with properties that are unfamiliar to the user. The detection considers past sign-in history to look for anomalous sign-ins.","author":"Mark Morowczynski '@markmorow', Gloria Lee, '@gleeiamglo'","status":"test","level":"high","date":"2023-09-03","modified":"","tags":["attack.stealth","attack.t1078","attack.persistence","attack.privilege-escalation","attack.initial-access"],"technique_ids":["T1078"],"logsource":{"product":"azure","service":"riskdetection"},"falsepositives":["User changing to a new device, location, browser, etc."],"references":["https://learn.microsoft.com/en-us/entra/id-protection/concept-identity-protection-risks#unfamiliar-sign-in-properties","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_unfamilar_sign_in.yml","source_sha256":"e5d5bbd8c29e96b0e78a357dd9471f7c13d276ff2bea6a31aae33739a309c2b2","source_url":"https://github.com/anpa1200/sigma/blob/b249e9683190cffdcaf188ccbfb90bf4759844e1/rules/cloud/azure/identity_protection/azure_identity_protection_unfamilar_sign_in.yml","license":"Detection Rule License 1.1","license_url":"https://github.com/SigmaHQ/Detection-Rule-License/blob/main/LICENSE.Detection.Rules.md","yaml":"title: Unfamiliar Sign-In Properties\nid: 128faeef-79dd-44ca-b43c-a9e236a60f49\nstatus: test\ndescription: Detects sign-in with properties that are unfamiliar to the user. The detection considers past sign-in history to look for anomalous sign-ins.\nreferences:\n    - https://learn.microsoft.com/en-us/entra/id-protection/concept-identity-protection-risks#unfamiliar-sign-in-properties\n    - https://learn.microsoft.com/en-us/entra/architecture/security-operations-user-accounts#unusual-sign-ins\nauthor: Mark Morowczynski '@markmorow', Gloria Lee, '@gleeiamglo'\ndate: 2023-09-03\ntags:\n    - attack.stealth\n    - attack.t1078\n    - attack.persistence\n    - attack.privilege-escalation\n    - attack.initial-access\nlogsource:\n    product: azure\n    service: riskdetection\ndetection:\n    selection:\n        riskEventType: 'unfamiliarFeatures'\n    condition: selection\nfalsepositives:\n    - User changing to a new device, location, browser, etc.\nlevel: high\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/128faeef-79dd-44ca-b43c-a9e236a60f49.json","kind":"sigma"}