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HighMicrosoft Sentinel analyticsMicrosoft Security Research

Identify SysAid Server web shell creation

This query looks for potential webshell creation by the threat actor Mercury after the sucessful exploitation of SysAid server. Reference:…

Description

This query looks for potential webshell creation by the threat actor Mercury after the sucessful exploitation of SysAid server. Reference: https://www.microsoft.com/security/blog/2022/08/25/mercury-leveraging-log4j-2-vulnerabilities-in-unpatched-systems-to-target-israeli-organizations/

Detection logic

Detection requirements

Platform
ContainersESXiIaaSLinuxmacOSNetwork DevicesWindows

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

Log source product
microsoftthreatprotectionsecurityeventswindowssecurityevents
Log source service
devicefileeventssecurityevent

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