Remote File Download Via Desktopimgdownldr Utility
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About the rule
Rule Type
Standard
Rule Description
Detects the desktopimgdownldr utility being used to download a remote file. An adversary may use desktopimgdownldr to download arbitrary files as an alternative to certutil.
Severity
Trouble
Rule Requirement
Criteria
Action1: actionname = "Process started" AND PROCESSNAME endswith "\desktopimgdownldr.exe" AND PARENTPROCESSNAME endswith "\desktopimgdownldr.exe" AND COMMANDLINE contains "/lockscreenurl:http" select Action1.HOSTNAME,Action1.MESSAGE,Action1.COMMANDLINE,Action1.FILE_NAME,Action1.PROCESSNAME,Action1.USERNAME,Action1.PARENTPROCESSNAME
Detection
Execution Mode
realtime
Log Sources
Windows
Author
Tim Rauch, Elastic (idea)
