alert tls $HOME_NET any -> $EXTERNAL_NET any (msg:"ET INFO CMS Hosting Domain in TLS SNI (storyblok .com)"; flow:established,to_server; tls.sni; dotprefix; content:".storyblok.com"; endswith; fast_pattern; classtype:misc-activity; sid:2048556; rev:1; metadata:attack_target Client_Endpoint, created_at 2023_10_12, deployment Perimeter, performance_impact Low, confidence High, signature_severity Informational, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2023_10_12, reviewed_at 2023_11_27;)