alert http $EXTERNAL_NET any -> $HOME_NET any (msg:"ET PHISHING Anonisma Phishing CSS 2015-12-29"; flow:established,from_server; http.content_type; content:"text/css"; startswith; file.data; content:".ANON-000-ISMA"; nocase; fast_pattern; classtype:social-engineering; sid:2031800; rev:4; metadata:attack_target Client_Endpoint, created_at 2015_12_29, deployment Perimeter, confidence Medium, signature_severity Major, tag Phishing, updated_at 2020_08_13;)