alert tls $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Observed JokerSpy Domain (git-hub .me in TLS SNI)"; flow:established,to_server; tls.sni; dotprefix; content:".git-hub.me"; endswith; fast_pattern; reference:url,www.bitdefender.com/blog/labs/fragments-of-cross-platform-backdoor-hint-at-larger-mac-os-attack/; classtype:domain-c2; sid:2046710; rev:1; metadata:attack_target Client_Endpoint, created_at 2023_06_30, deployment Perimeter, malware_family JokerSpy, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2023_06_30, mitre_tactic_id TA0011, mitre_tactic_name Command_And_Control, mitre_technique_id T1071, mitre_technique_name Application_Layer_Protocol;)