alert tls $HOME_NET any -> $EXTERNAL_NET any (msg:"ET INFO LVCHA VPN Domain (lcvpn .top) in TLS SNI"; flow:established,to_server; tls.sni; dotprefix; content:".lcvpn.top"; endswith; fast_pattern; reference:url,www.silentpush.com/blog/traffic-origin-chinese-vpn/; classtype:misc-activity; sid:2067595; rev:1; metadata:affected_product Android, attack_target Mobile_Client, created_at 2026_02_11, deployment Perimeter, performance_impact Low, confidence High, signature_severity Informational, tag Residential_Proxy_Services, tag VPN_Services, updated_at 2026_02_11, mitre_tactic_id TA0011, mitre_tactic_name Command_And_Control, mitre_technique_id T1572, mitre_technique_name Protocol_Tunneling;)