Suspicious Certutil Command
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About the rule
Rule Type
Standard
Rule Description
Detects the execution of certutil.exe, a command line tool used to access certificate authority configurations.
Severity
Critical
Rule Requirement
Criteria
Action1: actionname = "Process started" AND ((COMMANDLINE contains "certutil" AND (COMMANDLINE contains "-ping" OR COMMANDLINE contains "/URL" OR COMMANDLINE contains "-URL" OR COMMANDLINE contains "/pingURL")) OR (COMMANDLINE contains "-decode" OR COMMANDLINE contains "/decode" OR COMMANDLINE contains "-decodehex" OR COMMANDLINE contains "/decodehex" OR COMMANDLINE contains "-urlcache" OR COMMANDLINE contains "/urlcache" OR COMMANDLINE contains "-verifyctl" OR COMMANDLINE contains "/verifyctl" OR COMMANDLINE contains "-encode" OR COMMANDLINE contains "/encode")) select Action1.HOSTNAME,Action1.MESSAGE,Action1.COMMANDLINE,Action1.FILE_NAME,Action1.PROCESSNAME,Action1.USERNAME,Action1.PARENTPROCESSNAME
Detection
Execution Mode
realtime
Log Sources
Windows
