RunDLL32 Spawning Explorer

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About the rule

Rule Type

Standard

Rule Description

Detects RunDLL32.exe spawning explorer.exe as child, which is very uncommon, often observes Gamarue spawning the explorer.exe process in an unusual way

Severity

Trouble

Rule Requirement

Criteria

Action1: actionname = "Process started" AND (PARENTPROCESSNAME endswith "\rundll32.exe" AND PROCESSNAME endswith "\explorer.exe") AND PARENTPROCESSCOMMANDLINE notcontains "\shell32.dll,Control_RunDLL" select Action1.HOSTNAME,Action1.MESSAGE,Action1.COMMANDLINE,Action1.FILE_NAME,Action1.PROCESSNAME,Action1.USERNAME,Action1.PARENTPROCESSNAME

Detection

Execution Mode

realtime

Log Sources

Windows

Author

elhoim, CD_ROM_