alert tls $HOME_NET any -> $EXTERNAL_NET any (msg:"ET INFO DYNAMIC_DNS softether .net Domain Observed in TLS SNI"; flow:established,to_server; tls.sni; dotprefix; content:".softether.net"; endswith; fast_pattern; reference:url,softether.net; classtype:misc-activity; sid:2048268; rev:1; metadata:affected_product Any, attack_target Client_and_Server, created_at 2023_09_26, deployment Perimeter, performance_impact Low, confidence High, signature_severity Informational, updated_at 2023_09_26, reviewed_at 2023_09_26;)