alert tls $HOME_NET any -> $EXTERNAL_NET 443 (msg:"ET MALWARE Targeted Activity - CnC Domain in SNI"; flow:to_server,established; tls.sni; content:"dellgenius.hopto.org"; endswith; reference:md5,bedf648063aa10ea2810b2f6b9601326; classtype:domain-c2; sid:2029952; rev:1; metadata:created_at 2020_04_20, deployment Perimeter, performance_impact Low, confidence High, signature_severity Major, tag SSL_TLS_SNI, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_04_20;)