alert tls $HOME_NET any -> $EXTERNAL_NET any (msg:"ET POLICY Observed Packity Proxy Domain in TLS SNI"; flow:established,to_server; tls.sni; dotprefix; content:".packity.com"; endswith; reference:md5,47a200e64ea11b25efc9bf78c4b03a1c; classtype:domain-c2; sid:2030799; rev:2; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2020_08_26, deployment Perimeter, performance_impact Low, confidence High, signature_severity Informational, updated_at 2020_08_26;)