alert tls $HOME_NET any -> $EXTERNAL_NET any (msg:"ET EXPLOIT_KIT TA569 Keitaro TDS Domain in TLS SNI (bigbricks .org)"; flow:established,to_server; tls.sni; bsize:13; content:"bigbricks.org"; fast_pattern; classtype:exploit-kit; sid:2049000; rev:2; metadata:attack_target Client_Endpoint, created_at 2023_10_30, deployment Perimeter, deprecation_reason Relevance, performance_impact Low, confidence High, signature_severity Minor, tag SSL_Malicious_Cert, tag Exploit_Kit, tag ta569, tag TDS, tag compromised_website, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_08_09, reviewed_at 2024_08_09;)