Shell32 DLL Execution in Suspicious Directory

Last updated on:

About the rule

Rule Type

Standard

Rule Description

Detects shell32.dll executing a DLL in a suspicious directory

Severity

Trouble

Rule Requirement

Criteria

Action1: actionname = "Process started" AND (PROCESSNAME endswith "\rundll32.exe" OR ORIGINALFILENAME = "RUNDLL32.EXE") AND ((COMMANDLINE contains "shell32.dll" AND COMMANDLINE contains "Control_RunDLL") AND COMMANDLINE contains "%AppData%,%LocalAppData%,%Temp%,%tmp%,\AppData\,\Temp\,\Users\Public") select Action1.HOSTNAME,Action1.MESSAGE,Action1.COMMANDLINE,Action1.FILE_NAME,Action1.PROCESSNAME,Action1.USERNAME,Action1.PARENTPROCESSNAME

Detection

Execution Mode

realtime

Log Sources

Windows

Author

Christian Burkard (Nextron Systems)