alert tls $EXTERNAL_NET any -> $HOME_NET any (msg:"ET MALWARE Observed Malicious SSL Cert (OSX/AppleJeus Variant CnC)"; flow:established,to_client; tls.cert_subject; content:"CN=beastgoc.com"; nocase; endswith; reference:url,objective-see.com/blog/blog_0x49.html; classtype:domain-c2; sid:2028827; rev:1; metadata:affected_product Mac_OSX, attack_target Client_and_Server, created_at 2019_10_15, deployment Perimeter, performance_impact Low, confidence High, signature_severity Major, tag SSL_Malicious_Cert, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2019_10_15, mitre_tactic_id TA0011, mitre_tactic_name Command_And_Control, mitre_technique_id T1071, mitre_technique_name Application_Layer_Protocol;)