alert tcp $EXTERNAL_NET $HTTP_PORTS -> $HOME_NET any (msg:"ET WEB_CLIENT Microsoft IE FTP URL Arbitrary Command Injection"; flow:from_server,established; content:"ftp|3a|//"; nocase; pcre:"/ftp\://[^\' \"]*%0a/i"; reference:url,osvdb.org/12299; reference:cve,2004-1166; classtype:attempted-user; sid:2003230; rev:7; metadata:affected_product Web_Browsers, affected_product Web_Browser_Plugins, attack_target Client_Endpoint, created_at 2010_07_30, deployment Perimeter, confidence Low, signature_severity Major, tag Web_Client_Attacks, updated_at 2019_07_26, mitre_tactic_id TA0008, mitre_tactic_name Lateral_Movement, mitre_technique_id T1210, mitre_technique_name Exploitation_Of_Remote_Services;)