alert tls $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Observed ZharkBot Domain (solutionhub .cc in TLS SNI)"; flow:established,to_server; tls.sni; dotprefix; content:".solutionhub.cc"; endswith; fast_pattern; reference:url,research.openanalysis.net/zharkbot/rust/triage/2024/07/07/zharkbot.html; classtype:trojan-activity; sid:2054418; rev:1; metadata:attack_target Client_Endpoint, created_at 2024_07_09, deployment Perimeter, malware_family ZharkBOT, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_07_09, reviewed_at 2025_04_21, mitre_tactic_id TA0011, mitre_tactic_name Command_And_Control, mitre_technique_id T1071, mitre_technique_name Application_Layer_Protocol;)