alert http $EXTERNAL_NET any -> $HOME_NET any (msg:"ET PHISHING Successful Webmail Validator Phish M2 2016-09-02"; flow:to_client,established; http.stat_code; content:"200"; http.content_type; content:"text/html"; startswith; file.data; content:"<title>..|3a 3a|Thank you"; nocase; fast_pattern; content:"email address|3a 3a|..</title>"; nocase; distance:0; classtype:credential-theft; sid:2032103; rev:3; metadata:affected_product Web_Browsers, attack_target Client_Endpoint, created_at 2016_09_02, deployment Perimeter, confidence Medium, signature_severity Critical, tag Phishing_07012016, tag Phishing, updated_at 2020_07_27, mitre_tactic_id TA0001, mitre_tactic_name Initial_Access, mitre_technique_id T1566, mitre_technique_name Phishing;)