Suspicious Microsoft Teams Sender Domains Without a Threat Verdict

This query surfaces external Microsoft Teams sender domains that carry no threat verdict yet but are sending low-reputation URLs or unusual volume.

Detection logic

Detection requirements

Platform: Identity Provider Linux macOS Office Suite SaaS Windows
The rule states no platform. This is derived from the ATT&CK technique it maps to.
Log source product: microsoftthreatprotection
Log source service: messageevents messageurlinfo

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Detection rules

Suspicious Microsoft Teams Sender Domains Without a Threat Verdict

Detection logic

Detection requirements

MITRE ATT&CK mappings

From the source

Licence

Authorship

Detection rules