New File Association Using Exefile
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About the rule
Rule Type
Standard
Rule Description
Detects the abuse of the exefile handler in new file association. Used for bypass of security products.
Severity
Trouble
Rule Requirement
Criteria
Action1: actionname = "Registry value modified" AND (OBJECTNAME contains "Classes\." OR (OBJECTNAME endswith "Classes" AND OBJECTVALUENAME startswith ".")) AND INFORMATION = "exefile" select Action1.HOSTNAME,Action1.MESSAGE,Action1.OBJECTNAME,Action1.PROCESSNAME,Action1.PREVVAL,Action1.CHANGES
Detection
Execution Mode
realtime
Log Sources
Windows
Author
Andreas Hunkeler (@Karneades)
