alert tls $HOME_NET any -> $EXTERNAL_NET any (msg:"ET INFO Commonly Abused Domain in TLS SNI (freeclickr .com)"; flow:established,to_server; tls.sni; bsize:14; content:"freeclickr.com"; fast_pattern; classtype:misc-activity; sid:2047888; rev:1; metadata:affected_product Any, attack_target Client_Endpoint, created_at 2023_09_01, deployment Perimeter, performance_impact Low, confidence High, signature_severity Major, tag SSL_Malicious_Cert, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2023_09_01, reviewed_at 2023_10_06;)