alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET PHISHING Successful RBC Royal Bank Phish M1 Aug 17 2017"; flow:established,to_server; http.method; content:"POST"; http.request_body; content:"frompresignin_sip="; depth:18; nocase; fast_pattern; content:"&language="; nocase; distance:0; content:"&rsa_devprint="; nocase; distance:0; content:"&cn1="; nocase; distance:0; content:"&cn2="; nocase; distance:0; classtype:credential-theft; sid:2024586; rev:3; metadata:affected_product Web_Browsers, attack_target Client_Endpoint, created_at 2017_08_17, deployment Perimeter, deprecation_reason Age, confidence Medium, signature_severity Critical, tag Phishing, updated_at 2026_05_07, mitre_tactic_id TA0001, mitre_tactic_name Initial_Access, mitre_technique_id T1566, mitre_technique_name Phishing;)