alert http $EXTERNAL_NET any -> $HOME_NET any (msg:"ET WEB_CLIENT Microsoft Tech Support Scam M1 2016-09-15"; flow:to_client,established; http.stat_code; content:"200"; http.content_type; content:"text/html"; startswith; file.data; content:"Download Security Essentials"; nocase; fast_pattern; content:"Malicious Software Removal"; nocase; distance:0; content:"<audio"; content:"autoplay="; nocase; distance:0; content:"autoplay"; distance:1; nocase; content:"audio/mpeg"; nocase; distance:0; content:"getURLParameter"; content:"setTimeout"; distance:0; classtype:social-engineering; sid:2023235; rev:3; metadata:affected_product Web_Browsers, attack_target Client_Endpoint, created_at 2016_09_15, deployment Perimeter, confidence Medium, signature_severity Major, tag Phishing, updated_at 2020_07_27;)