Exchange IIS Worker Dropping Webshells

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This query checks for the IIS worker process dropping files that resemble web shells and other artifacts seen in known attacks. Reference: https://msrc-blog.microsoft.com/2021/03/02/multiple-security-updates-released-for-exchange-server

Attribute Value
Type Hunting Query
Solution Web Shells Threat Protection
ID 42e7df5b-80f6-49a5-946a-08026ec24807
Tactics Execution, Persistence
Required Connectors MicrosoftThreatProtection
Source View on GitHub

Tables Used

This content item queries data from the following tables:

Table Transformations Ingestion API Lake-Only
DeviceFileEvents ?

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