alert tls $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Observed Bitter APT Related Domain in TLS SNI"; flow:established,to_server; tls.sni; bsize:22; content:"deliciosoprimecare.com"; fast_pattern; reference:md5,f8e036b1117870be508badaa0bca1537; classtype:domain-c2; sid:2049099; rev:2; metadata:attack_target Client_Endpoint, created_at 2023_11_07, deployment Perimeter, performance_impact Low, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2023_12_07, reviewed_at 2023_12_07, mitre_tactic_id TA0011, mitre_tactic_name Command_And_Control, mitre_technique_id T1071, mitre_technique_name Application_Layer_Protocol; target:src_ip;)