Process Memory Dump Via Comsvcs.DLL
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About the rule
Rule Type
Standard
Rule Description
Detects a process memory dump via "comsvcs.dll" using rundll32, covering multiple different techniques (ordinal, minidump function, etc.)
Severity
Trouble
Rule Requirement
Criteria
Action1: actionname = "Process started" AND ((PROCESSNAME endswith "\rundll32.exe" OR ORIGINALFILENAME = "RUNDLL32.EXE" OR COMMANDLINE contains "rundll32") AND ((COMMANDLINE contains "comsvcs" AND COMMANDLINE contains "full") AND COMMANDLINE contains "#-,#+,#24,24 ,MiniDump,#65560")) OR ((COMMANDLINE contains "24" AND COMMANDLINE contains "comsvcs" AND COMMANDLINE contains "full") AND COMMANDLINE contains " #,,#,, #,"#") 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), Modexp, Nasreddine Bencherchali (Nextron Systems)
