alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ThreatFox botnet C2 traffic (url - confidence level: 49%)"; flow:established,from_client; http.method; content:"GET"; http.uri; content:"/common/include/tech/default.php"; depth:32; nocase; http.host; content:"www.pyrotech.co.kr"; depth:18; isdataat:!1,relative; reference:url, threatfox.abuse.ch/ioc/1814517/; target:src_ip; metadata:confidence_level 49, first_seen 2026_05_15; classtype:trojan-activity; sid:91814517; rev:1;)