alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET PHISHING Successful HM Revenue & Customs Phish M2 Apr 07 2017"; flow:to_server,established; http.method; content:"POST"; http.request_body; content:"cnumber="; depth:8; nocase; fast_pattern; content:"&expm="; nocase; distance:0; content:"&expy="; nocase; distance:0; content:"&cvv="; nocase; distance:0; content:"&cname="; nocase; distance:0; content:"&submitForm="; nocase; distance:0; classtype:credential-theft; sid:2024185; rev:3; metadata:affected_product Web_Browsers, attack_target Client_Endpoint, created_at 2017_04_07, deployment Perimeter, confidence Medium, signature_severity Critical, tag Phishing, updated_at 2020_08_05, mitre_tactic_id TA0001, mitre_tactic_name Initial_Access, mitre_technique_id T1566, mitre_technique_name Phishing;)