alert http $EXTERNAL_NET any -> $HOME_NET any (msg:"ET PHISHING Successful Mailbox Shutdown Phish M2 2016-05-16"; flow:from_server,established; http.stat_code; content:"200"; http.content_type; content:"text/html"; startswith; file.data; content:"<title>Mail Settings"; nocase; fast_pattern; content:"Password Reset"; nocase; distance:0; content:"<meta http-equiv="; nocase; content:"REFRESH"; nocase; distance:1; within:7; content:"loader.gif"; distance:0; classtype:credential-theft; sid:2032383; rev:4; metadata:attack_target Client_Endpoint, created_at 2016_05_16, deployment Perimeter, confidence Medium, signature_severity Critical, tag Phishing, updated_at 2020_08_13, mitre_tactic_id TA0001, mitre_tactic_name Initial_Access, mitre_technique_id T1566, mitre_technique_name Phishing;)