DLL Call by Ordinal Via Rundll32.EXE
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About the rule
Rule Type
Standard
Rule Description
Detects calls of DLLs exports by ordinal numbers via rundll32.dll.
Severity
Trouble
Rule Requirement
Criteria
Action1: actionname = "Process started" AND ((PROCESSNAME endswith "\rundll32.exe" OR ORIGINALFILENAME = "RUNDLL32.EXE") AND COMMANDLINE contains ",#,, #,.dll #,.ocx #") AND ((COMMANDLINE notcontains "EDGEHTML.dll" OR COMMANDLINE notcontains "#141") AND (PARENTPROCESSNAME notcontains "\Msbuild\Current\Bin\,\VC\Tools\MSVC\,\Tracker.exe" OR COMMANDLINE notcontains "\FileTracker32.dll,#1,\FileTracker32.dll",#1,\FileTracker64.dll,#1,\FileTracker64.dll",#1")) select Action1.HOSTNAME,Action1.MESSAGE,Action1.COMMANDLINE,Action1.FILE_NAME,Action1.PROCESSNAME,Action1.USERNAME,Action1.PARENTPROCESSNAME
Detection
Execution Mode
realtime
Log Sources
Windows
Author
Florian Roth (Nextron Systems)
