alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ThreatFox botnet C2 traffic (url - confidence level: 75%)"; flow:established,from_client; http.method; content:"GET"; http.uri; content:"/static-directory/lt.mp3"; depth:24; nocase; http.host; content:"webcdns.com"; depth:11; isdataat:!1,relative; reference:url, threatfox.abuse.ch/ioc/1766821/; target:src_ip; metadata:confidence_level 75, first_seen 2026_03_15; classtype:trojan-activity; sid:91766821; rev:1;)