Suspicious Browser Activity

Title: Suspicious Browser Activity
Status: test
Description:Indicates anomalous behavior based on suspicious sign-in activity across multiple tenants from different countries in the same browser
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
Author: Mark Morowczynski '@markmorow', Gloria Lee, '@gleeiamglo'
Date: 2023-09-03
modified:None
Tags:

• -'attack.stealth'
• -'attack.t1078'
• -'attack.persistence'
• -'attack.privilege-escalation'
• -'attack.initial-access'

Logsource:

• product: azure
• service: riskdetection

Detection:
  selection:
    riskEventType: 'suspiciousBrowser'
  condition:selection
Falsepositives:
  -We recommend investigating the sessions flagged by this detection in the context of other sign-ins from the user.
Level: high