Suspicious Screensaver Binary File Creation
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About the rule
Rule Type
Standard
Rule Description
Adversaries may establish persistence by executing malicious content triggered by user inactivity. Screensavers are programs that execute after a configurable time of user inactivity and consist of Portable Executable (PE) files with a .scr file extension
Severity
Trouble
Rule Requirement
Criteria
Action1: actionname = "File Created or Modified" AND (FILENAME endswith ".scr" OR OBJECTNAME endswith ".scr") AND (PROCESSNAME notendswith "\Kindle.exe,\Bin\ccSvcHst.exe" AND (PROCESSNAME notendswith "\TiWorker.exe" OR (FILENAME notendswith "\uwfservicingscr.scr" AND OBJECTNAME notendswith "\uwfservicingscr.scr"))) select Action1.HOSTNAME,Action1.MESSAGE,Action1.USERNAME,Action1.DOMAIN,Action1.OBJECTNAME,Action1.FILENAME,Action1.PROCESSNAME
Detection
Execution Mode
realtime
Log Sources
Windows
Author
frack113
