alert http $EXTERNAL_NET any -> $HOME_NET any (msg:"ET PHISHING Mailbox Update Phishing Landing M1 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:"upgrade your mailbox"; nocase; distance:0; content:"Mail Administrator"; nocase; distance:0; classtype:social-engineering; sid:2025677; rev:3; metadata:attack_target Client_Endpoint, created_at 2016_05_16, deployment Perimeter, confidence Medium, signature_severity Major, tag Phishing, updated_at 2020_07_10;)