alert tls $EXTERNAL_NET any -> $HOME_NET any (msg:"ET MALWARE Observed Malicious SSL Cert (OSX/Nukesped CnC)"; flow:established,to_client; tls.cert_subject; content:"CN=crabbedly.club"; nocase; endswith; reference:url,blog.trendmicro.com/trendlabs-security-intelligence/mac-backdoor-linked-to-lazarus-targets-korean-users; classtype:domain-c2; sid:2029005; rev:1; metadata:affected_product Mac_OSX, attack_target Client_and_Server, created_at 2019_11_20, deployment Perimeter, malware_family NukeSped, performance_impact Low, confidence High, signature_severity Major, tag SSL_Malicious_Cert, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2019_11_20, mitre_tactic_id TA0011, mitre_tactic_name Command_And_Control, mitre_technique_id T1071, mitre_technique_name Application_Layer_Protocol;)