Detectionhightest

Suspicious Browser Activity

Indicates anomalous behavior based on suspicious sign-in activity across multiple tenants from different countries in the same browser

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Open this Sigma rule in the converter with the YAML preloaded and ready for backend selection.

Mark Morowczynski, Gloria LeeCreated Sun Sep 03944f6adb-7a99-4c69-80c1-b712579e93e6cloud

Log Source

Azureriskdetection

ProductAzure← raw: azure

Serviceriskdetection← raw: riskdetection

Detection Logic

detection:
    selection:
        riskEventType: 'suspiciousBrowser'
    condition: selection

False Positives

We recommend investigating the sessions flagged by this detection in the context of other sign-ins from the user.

References

MITRE ATT&CK

Tactics

Techniques

Rule Metadata

Rule ID

944f6adb-7a99-4c69-80c1-b712579e93e6

Status

test

Level

high

Type

Detection

Created

Sun Sep 03

Author

Path

rules/cloud/azure/identity_protection/azure_identity_protection_suspicious_browser.yml

Raw Tags

attack.t1078attack.persistenceattack.defense-evasionattack.privilege-escalationattack.initial-access