Suspicious ShellExec_RunDLL Call Via Ordinal
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About the rule
Rule Type
Standard
Rule Description
Detects suspicious call to the "ShellExec_RunDLL" exported function of SHELL32.DLL through the ordinal number to launch other commands. Adversary might only use the ordinal number in order to bypass existing detection that alert on usage of ShellExec_RunDLL on CommandLine.
Severity
Trouble
Rule Requirement
Criteria
Action1: actionname = "Process started" AND (PARENTPROCESSCOMMANDLINE contains "SHELL32.DLL" AND PARENTPROCESSCOMMANDLINE contains "#568,#570,#572,#576") AND ((PARENTPROCESSCOMMANDLINE contains "comspec,iex,Invoke-,msiexec,odbcconf,regsvr32" OR PARENTPROCESSCOMMANDLINE contains "\Desktop\,\ProgramData\,\Temp\,\Users\Public") OR PROCESSNAME endswith "\bash.exe,\bitsadmin.exe,\cmd.exe,\cscript.exe,\curl.exe,\mshta.exe,\msiexec.exe,\msxsl.exe,\odbcconf.exe,\powershell.exe,\pwsh.exe,\regsvr32.exe,\schtasks.exe,\wmic.exe,\wscript.exe") select Action1.HOSTNAME,Action1.MESSAGE,Action1.COMMANDLINE,Action1.FILE_NAME,Action1.PROCESSNAME,Action1.USERNAME,Action1.PARENTPROCESSNAME
Detection
Execution Mode
realtime
Log Sources
Windows
Author
Swachchhanda Shrawan Poudel
