Potential File Extension Spoofing Using Right-to-Left Override
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About the rule
Rule Type
Standard
Rule Description
Detects suspicious filenames that contain a right-to-left override character and a potentially spoofed file extensions.
Severity
Trouble
Rule Requirement
Criteria
Action1: actionname = "File Created or Modified" AND (FILENAME contains "\u202e" OR OBJECTNAME contains "\u202e") AND (FILENAME contains "fpd..,nls..,vsc..,xcod.,xslx." OR OBJECTNAME contains "fpd..,nls..,vsc..,xcod.,xslx.") select Action1.HOSTNAME,Action1.MESSAGE,Action1.USERNAME,Action1.DOMAIN,Action1.OBJECTNAME,Action1.FILENAME,Action1.PROCESSNAME
Detection
Execution Mode
realtime
Log Sources
Windows
Author
Jonathan Peters (Nextron Systems), Florian Roth (Nextron Systems)
