alert http $EXTERNAL_NET any -> $HOME_NET any (msg:"ET PHISHING Successful OWA Phish Apr 25 2017"; flow:from_server,established; http.stat_code; content:"200"; http.content_type; content:"text/html"; startswith; file.data; content:"<meta http-equiv="; nocase; content:"refresh"; nocase; distance:1; within:7; content:"office365.com/owa/"; nocase; distance:0; fast_pattern; content:"<title>Account"; nocase; distance:0; content:"Success"; nocase; within:20; classtype:credential-theft; sid:2024999; rev:3; metadata:affected_product Web_Browsers, attack_target Client_Endpoint, created_at 2017_04_25, deployment Perimeter, confidence Medium, signature_severity Critical, tag Phishing, updated_at 2020_08_05, mitre_tactic_id TA0001, mitre_tactic_name Initial_Access, mitre_technique_id T1566, mitre_technique_name Phishing;)