alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ThreatFox botnet C2 traffic (url - confidence level: 100%)"; flow:established,from_client; http.method; content:"GET"; http.uri; content:"/login.php"; depth:10; nocase; http.host; content:"f1231561.xsph.ru"; depth:16; isdataat:!1,relative; reference:url, threatfox.abuse.ch/ioc/1749929/; target:src_ip; metadata:confidence_level 100, first_seen 2026_02_17; classtype:trojan-activity; sid:91749929; rev:1;)