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UnknownMicrosoft Sentinel analytics

Possible partner impersonation in external Team messages

This query can be used as a Custom Detection Rule (CDR) to trigger when a partner email domain or email address is used in a Sender display name part of an inbound external Teams message

Detection logic

Detection requirements

Platform
ContainersESXiIaaSIdentity ProviderLinuxmacOSNetwork DevicesOffice SuiteWindows

The rule states no platform. This is derived from the ATT&CK technique it maps to.

Log source product
microsoftthreatprotection
Log source service
messageevents

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