alert http $EXTERNAL_NET any -> $HOME_NET any (
msg:"ET WEB_CLIENT Tech Support Phone Scam Landing 2017-07-26";
flow:from_server,established;
file_data;
content:"Microsoft Windows Notification"; nocase; fast_pattern;
content:"<audio autoplay=autoplay loop id=audio>"; nocase; distance:0;
content:".mp3 type=audio/mpeg"; nocase; distance:0;
classtype:social-engineering;
sid:2025908; rev:3;
metadata:affected_product Web_Browsers, attack_target Client_Endpoint, created_at 2018_07_26, deployment Perimeter, confidence High, signature_severity Minor, tag Tech_Support_Scam, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2019_08_16;
)