alert http $EXTERNAL_NET any -> $HOME_NET any (msg:"ET PHISHING Successful Docusign Phish M1 2016-08-17"; flow:established,from_server; 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:8; content:"<title>Error"; nocase; fast_pattern; distance:0; content:"MM_preloadImages"; nocase; distance:0; content:"Try Again"; nocase; distance:0; content:"This page will redirect"; nocase; distance:0; classtype:credential-theft; sid:2032043; rev:3; metadata:affected_product Web_Browsers, attack_target Client_Endpoint, created_at 2016_08_17, deployment Perimeter, confidence Medium, signature_severity Critical, tag Phishing, updated_at 2020_07_27, mitre_tactic_id TA0001, mitre_tactic_name Initial_Access, mitre_technique_id T1566, mitre_technique_name Phishing;)