ClickFix Hidden Window Execution from Run Dialog
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About the rule
Rule Type
Standard
Rule Description
Detects cmd.exe spawned from explorer.exe Run Dialog with hidden window flags -- a definitive ClickFix/Fake CAPTCHA indicator since legitimate Run Dialog commands never hide their execution window.
Severity
Trouble
Rule Requirement
Criteria
Action1:
actionname = "Process started" AND ( PARENTPROCESSNAME endswith "\explorer.exe" AND ( PROCESSNAME endswith "\cmd.exe" OR ORIGINALFILENAME = "Cmd.Exe" ) AND COMMANDLINE contains "/c" AND ( COMMANDLINE contains "start /min" OR COMMANDLINE contains "start /b" OR COMMANDLINE contains "-w hidden" OR COMMANDLINE contains "-windowstyle h" ))
select Action1.HOSTNAME,Action1.MESSAGE,Action1.COMMANDLINE,Action1.FILE_NAME,Action1.PROCESSNAME,Action1.USERNAME,Action1.PARENTPROCESSNAME,Action1.DOMAIN,Action1.ORIGINALFILENAME,Action1.PARENTPROCESSID,Action1.PROCESSID,Action1.PRODUCT_NAME,Action1.SECURITYID
Detection
Execution Mode
realtime
Log Sources
Windows
