alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET PHISHING Suspicious CVV Parameter in HTTP POST - Possible Phishing"; flow:established,to_server; http.method; content:"POST"; http.request_body; content:"&cvv="; nocase; pcre:"/^[0-9]{3,4}/R"; classtype:trojan-activity; sid:2026909; rev:3; metadata:affected_product Web_Browsers, attack_target Client_Endpoint, created_at 2019_02_14, deployment Perimeter, confidence Medium, signature_severity Critical, tag Phishing, updated_at 2022_09_06, mitre_tactic_id TA0001, mitre_tactic_name Initial_Access, mitre_technique_id T1566, mitre_technique_name Phishing;)