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UnknownMicrosoft Sentinel analytics

Exchange IIS Worker Dropping Webshells

This query checks for the IIS worker process dropping files that resemble web shells and other artifacts seen in known attacks. Reference:…

Description

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

Detection logic

Detection requirements

Log source product
microsoftthreatprotection
Log source service
devicefileevents

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