alert tls $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Observed Malsmoke Staging Domain in SNI"; flow:to_server,established; tls.sni; content:"premiumpornotubes.com"; endswith; classtype:social-engineering; sid:2033421; rev:1; metadata:attack_target Client_Endpoint, created_at 2021_07_26, deployment Perimeter, confidence High, signature_severity Major, tag SSL_TLS_SNI, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2021_07_26;)