alert http $EXTERNAL_NET any -> $HOME_NET any (msg:"ET WEB_CLIENT Tech Support Phone Scam Landing M1 2016-08-12"; flow:established,from_server; http.stat_code; content:"200"; http.content_type; content:"text/html"; startswith; file.data; content:"<title>System Infect"; nocase; fast_pattern; content:"toggleFullScreen"; distance:0; content:"countdown"; distance:0; content:"twoDigits"; distance:0; classtype:social-engineering; sid:2023057; rev:3; metadata:affected_product Web_Browsers, attack_target Client_Endpoint, created_at 2016_08_12, deployment Perimeter, performance_impact Low, confidence High, signature_severity Major, tag Phishing, updated_at 2020_07_27;)