alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ThreatFox payload delivery (url - confidence level: 90%)"; flow:established,from_client; http.method; content:"GET"; http.uri; content:"/opciones/"; depth:10; nocase; http.host; content:"b2b.castorsunglasses.es"; depth:23; isdataat:!1,relative; reference:url, threatfox.abuse.ch/ioc/1810456/; target:src_ip; metadata:confidence_level 90, first_seen 2026_05_12; classtype:trojan-activity; sid:91810456; rev:1;)