alert tls $EXTERNAL_NET any -> $HOME_NET any (msg:"ET MALWARE Observed Malicious SSL Cert (MSIL/Agent.TRM CnC)"; flow:established,to_client; tls.cert_subject; content:"CN=microsoft-hohm.space"; bsize:23; fast_pattern; reference:url,twitter.com/w3ndige/status/1247547923845578755; reference:md5,d2b81c4f5d075daa681f823cc9a5e4c0; classtype:domain-c2; sid:2029852; rev:1; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_and_Server, created_at 2020_04_09, deployment Perimeter, performance_impact Low, confidence High, signature_severity Major, tag SSL_Malicious_Cert, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_04_09, mitre_tactic_id TA0011, mitre_tactic_name Command_And_Control, mitre_technique_id T1071, mitre_technique_name Application_Layer_Protocol;)