alert tls $HOME_NET any -> $EXTERNAL_NET any (msg:"ET EXPLOIT_KIT TA569 Middleware Domain in TLS SNI (aitcaid .com)"; flow:established,to_server; tls.sni; bsize:11; content:"aitcaid.com"; fast_pattern; reference:url,community.emergingthreats.net/t/et-socgholish-rules-response-guidance/335; classtype:exploit-kit; sid:2050768; rev:2; metadata:affected_product Web_Browsers, attack_target Client_Endpoint, created_at 2024_02_07, deployment Perimeter, performance_impact Low, confidence High, signature_severity Critical, tag Exploit_Kit, tag TDS, tag compromised_website, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2026_06_08, reviewed_at 2024_10_24;)