ISO or Image Mount Indicator in Recent Files
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About the rule
Rule Type
Standard
Rule Description
Detects the creation of recent element file that points to an .ISO, .IMG, .VHD or .VHDX file as often used in phishing attacks. This can be a false positive on server systems but on workstations users should rarely mount .iso or .img files.
Severity
Trouble
Rule Requirement
Criteria
Action1: actionname = "File Created or Modified" AND (FILENAME endswith ".iso.lnk,.img.lnk,.vhd.lnk,.vhdx.lnk" OR OBJECTNAME endswith ".iso.lnk,.img.lnk,.vhd.lnk,.vhdx.lnk") AND (FILENAME contains "\Microsoft\Windows\Recent" OR OBJECTNAME contains "\Microsoft\Windows\Recent") select Action1.HOSTNAME,Action1.MESSAGE,Action1.USERNAME,Action1.DOMAIN,Action1.OBJECTNAME,Action1.FILENAME,Action1.PROCESSNAME
Detection
Execution Mode
realtime
Log Sources
Windows
Author
Florian Roth (Nextron Systems)
