alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET PHISHING Successful HM Revenue Phish 2016-11-23"; flow:to_server,established; http.method; content:"POST"; http.uri; content:".php?form=Tax"; nocase; content:"&sslchannel="; nocase; distance:0; content:"&sessionid="; nocase; distance:0; content:"&securessl="; nocase; distance:0; http.header; content:".php?form=Tax"; nocase; content:"&sslchannel="; nocase; distance:0; content:"&sessionid="; nocase; distance:0; http.request_body; content:"form-data|3b 20|name=|22|ccname|22|"; nocase; content:"form-data|3b 20|name=|22|ccno|22|"; nocase; content:"form-data|3b 20|name=|22|ccexp|22|"; nocase; fast_pattern; http.content_type; content:"multipart/form-data|3b|"; startswith; classtype:credential-theft; sid:2032193; rev:3; metadata:affected_product Web_Browsers, attack_target Client_Endpoint, created_at 2016_11_23, deployment Perimeter, confidence Medium, signature_severity Critical, tag Phishing, updated_at 2020_08_03, mitre_tactic_id TA0001, mitre_tactic_name Initial_Access, mitre_technique_id T1566, mitre_technique_name Phishing;)