alert http $EXTERNAL_NET any -> $HOME_NET any (msg:"ET PHISHING Mailbox Upgrade Phishing Landing 2016-06-27"; flow:to_client,established; http.stat_code; content:"200"; http.content_type; content:"text/html"; startswith; file.data; content:"<title>Signin Template"; nocase; fast_pattern; content:"Please upgrade your mailbox"; nocase; distance:0; content:"Password"; nocase; distance:0; content:"upgrade account"; nocase; distance:0; classtype:social-engineering; sid:2032022; rev:3; metadata:attack_target Client_Endpoint, created_at 2016_06_27, deployment Perimeter, confidence Medium, signature_severity Major, tag Phishing, updated_at 2020_07_15;)