alert tls $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE RustyBuer CnC Domain in SNI"; flow:to_server,established; tls.sni; content:"shipmentofficedepot.com"; endswith; classtype:domain-c2; sid:2033415; rev:1; metadata:created_at 2021_07_25, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2021_07_25;)