{"id":"944f6adb-7a99-4c69-80c1-b712579e93e6","title":"Suspicious Browser Activity","description":"Indicates anomalous behavior based on suspicious sign-in activity across multiple tenants from different countries in the same browser","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":["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#suspicious-browser","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_suspicious_browser.yml","source_sha256":"51da4838ed03cec094181ad0b22305b26fe8a155fb454ec11b77661e80f606f2","source_url":"https://github.com/anpa1200/sigma/blob/b249e9683190cffdcaf188ccbfb90bf4759844e1/rules/cloud/azure/identity_protection/azure_identity_protection_suspicious_browser.yml","license":"Detection Rule License 1.1","license_url":"https://github.com/SigmaHQ/Detection-Rule-License/blob/main/LICENSE.Detection.Rules.md","yaml":"title: Suspicious Browser Activity\nid: 944f6adb-7a99-4c69-80c1-b712579e93e6\nstatus: test\ndescription: Indicates anomalous behavior based on suspicious sign-in activity across multiple tenants from different countries in the same browser\nreferences:\n    - https://learn.microsoft.com/en-us/entra/id-protection/concept-identity-protection-risks#suspicious-browser\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: 'suspiciousBrowser'\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/T1078","id":"T1078","name":"Valid Accounts","page":"techniques/enterprise/T1078/"}],"data_path":"data/detection-rules/944f6adb-7a99-4c69-80c1-b712579e93e6.json","kind":"sigma"}