alert tls $HOME_NET any -> $EXTERNAL_NET any (msg:"ET EXPLOIT_KIT TA569 Middleware Server Domain in TLS SNI (www .split2econd .com)"; flow:established,to_server; tls.sni; bsize:19; content:"www.split2econd.com"; fast_pattern; reference:url,community.emergingthreats.net/t/et-socgholish-rules-response-guidance/335; classtype:exploit-kit; sid:2063410; rev:3; metadata:affected_product Web_Browsers, attack_target Client_Endpoint, created_at 2025_07_10, deployment Perimeter, former_category MALWARE, malware_family SocGholish, performance_impact Low, confidence High, signature_severity Major, tag Exploit_Kit, tag ta569, tag compromised_website, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2025_08_07, mitre_tactic_id TA0001, mitre_tactic_name Initial_Access, mitre_technique_id T1189, mitre_technique_name Drive_by_Compromise;)