Rundll32 InstallScreenSaver Execution

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About the rule

Rule Type

Standard

Rule Description

An attacker may execute an application as a SCR File using rundll32.exe desk.cpl,InstallScreenSaver

Severity

Trouble

Rule Requirement

Criteria

Action1: actionname = "Process started" AND (PROCESSNAME endswith "\rundll32.exe" OR ORIGINALFILENAME = "RUNDLL32.EXE") AND COMMANDLINE contains "InstallScreenSaver" select Action1.HOSTNAME,Action1.MESSAGE,Action1.COMMANDLINE,Action1.FILE_NAME,Action1.PROCESSNAME,Action1.USERNAME,Action1.PARENTPROCESSNAME

Detection

Execution Mode

realtime

Log Sources

Windows

Author

Christopher Peacock @securepeacock, SCYTHE @scythe_io, TactiKoolSec