alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET PHISHING Possible Successful Generic Phish (set) 2019-02-13"; flow:to_server,established; flowbits:set,ET.genericphish; flowbits:noalert; http.method; content:"POST"; http.request_body; content:"ud="; depth:3; nocase; content:"|25|40"; distance:0; content:"&pd="; nocase; fast_pattern; distance:0; pcre:"/^ud=[^&]*&pd=[^&]*/i"; classtype:credential-theft; sid:2026904; rev:3; metadata:affected_product Web_Browsers, attack_target Client_Endpoint, created_at 2019_02_13, deployment Perimeter, confidence Medium, signature_severity Critical, tag Phishing, updated_at 2020_08_28, mitre_tactic_id TA0001, mitre_tactic_name Initial_Access, mitre_technique_id T1566, mitre_technique_name Phishing;)