Potential Mpclient.DLL Sideloading

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About the rule

Rule Type

Standard

Rule Description

Detects potential sideloading of "mpclient.dll" by Windows Defender processes ("MpCmdRun" and "NisSrv") from their non-default directory.

Severity

Trouble

Rule Requirement

Criteria

Action1: actionname = "sa_imageloaded" AND (OBJECTNAME endswith "\mpclient.dll" AND PROCESSNAME endswith "\MpCmdRun.exe,\NisSrv.exe") AND PROCESSNAME notstartswith "C:\Program Files (x86)\Windows Defender\,C:\Program Files\Microsoft Security Client\,C:\Program Files\Windows Defender\,C:\ProgramData\Microsoft\Windows Defender\Platform\,C:\Windows\WinSxS" select Action1.HOSTNAME,Action1.MESSAGE,Action1.PROCESSNAME,Action1.PRODUCT_NAME,Action1.OBJECTNAME

Detection

Execution Mode

realtime

Log Sources

Windows

Author

Bhabesh Raj