Suspicious WSMAN Provider Image Loads

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About the rule

Rule Type

Standard

Rule Description

Detects signs of potential use of the WSMAN provider from uncommon processes locally and remote execution.

Severity

Trouble

Rule Requirement

Criteria

Action1: actionname = "sa_imageloaded" AND ((OBJECTNAME endswith "\WsmSvc.dll,\WsmAuto.dll,\Microsoft.WSMan.Management.ni.dll" OR ORIGINALFILENAME = "WsmSvc.dll,WSMANAUTOMATION.DLL,Microsoft.WSMan.Management.dll") OR (PROCESSNAME endswith "\svchost.exe" AND ORIGINALFILENAME = "WsmWmiPl.dll")) AND (PROCESSNAME notendswith "\powershell.exe,C:\Windows\System32\sdiagnhost.exe,C:\Windows\System32\services.exe" AND COMMANDLINE notcontains "svchost.exe -k netsvcs -p -s BITS,svchost.exe -k GraphicsPerfSvcGroup -s GraphicsPerfSvc,svchost.exe -k NetworkService -p -s Wecsvc,svchost.exe -k netsvcs" AND (PROCESSNAME notstartswith "C:\Windows\Microsoft.NET\Framework64\v,C:\Windows\Microsoft.NET\Framework\v,C:\Windows\Microsoft.NET\FrameworkArm\v,C:\Windows\Microsoft.NET\FrameworkArm64\v" OR PROCESSNAME notendswith "\mscorsvw.exe") AND PROCESSNAME != "C:\Windows\System32\Configure-SMRemoting.exe,C:\Windows\System32\ServerManager.exe" AND PROCESSNAME notstartswith "C:\Windows\Temp\asgard2-agent" AND PROCESSNAME notstartswith "C:\Program Files\Citrix" AND PROCESSNAME notendswith "\powershell_ise.exe" AND PROCESSNAME notstartswith "C:\$WINDOWS.~BT\Sources") AND (PROCESSNAME notendswith "\svchost.exe" OR isExist(COMMANDLINE)) select Action1.HOSTNAME,Action1.MESSAGE,Action1.PROCESSNAME,Action1.PRODUCT_NAME,Action1.OBJECTNAME

Detection

Execution Mode

realtime

Log Sources

Windows

Author

Roberto Rodriguez (Cyb3rWard0g), OTR (Open Threat Research)