alert http $EXTERNAL_NET any -> $HOME_NET any (msg:"ET WEB_CLIENT Microsoft Tech Support Phone Scam M3 Jul 07 2017"; flow:established,to_client; http.stat_code; content:"200"; http.content_type; content:"text/html"; startswith; file.data; content:"<title>"; nocase; content:"virus warning alert"; nocase; within:50; fast_pattern; classtype:social-engineering; sid:2024446; rev:4; metadata:affected_product Web_Browsers, attack_target Client_Endpoint, created_at 2017_07_07, deployment Perimeter, confidence High, signature_severity Minor, tag Tech_Support_Scam, updated_at 2020_09_01;)