alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET PHISHING Possible Successful Generic Phish (set) 2021-04-08"; flow:to_server,established; flowbits:set,ET.genericphish; flowbits:noalert; http.method; content:"POST"; http.request_body; content:"emid="; depth:5; nocase; fast_pattern; content:"&epass="; nocase; distance:0; pcre:"/^emid=[^&]*&epass/i"; classtype:credential-theft; sid:2032532; rev:1; metadata:affected_product Web_Browsers, attack_target Client_Endpoint, created_at 2021_04_08, deployment Perimeter, confidence Medium, signature_severity Critical, tag Phishing, updated_at 2021_04_08, mitre_tactic_id TA0001, mitre_tactic_name Initial_Access, mitre_technique_id T1566, mitre_technique_name Phishing;)