alert tls $HOME_NET any -> $EXTERNAL_NET any (msg:"ET INFO Tunneling Service in TLS SNI (* .ply .gg)"; flow:established,to_server; tls.sni; dotprefix; content:".ply.gg"; endswith; fast_pattern; classtype:misc-activity; sid:2054990; rev:1; metadata:attack_target Client_Endpoint, created_at 2024_08_07, deployment Perimeter, performance_impact Low, confidence High, signature_severity Informational, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_08_07, reviewed_at 2025_01_06;)