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:"/xrf"; depth:4; nocase; http.host; content:"white.chanleil.com"; depth:18; isdataat:!1,relative; reference:url, threatfox.abuse.ch/ioc/1811605/; target:src_ip; metadata:confidence_level 49, first_seen 2026_05_14; classtype:trojan-activity; sid:91811605; rev:1;)