alert tls $EXTERNAL_NET any -> $HOME_NET any (msg:"ET MALWARE Observed Malicious SSL Cert (chMiner/RAT)"; flow:established,to_client; tls.cert_subject; content:"CN=8Yq1.qSt3.S5It.Lbp0"; bsize:22; fast_pattern; reference:url,twitter.com/3xp0rtblog/status/1374080723032887297; reference:md5,102362f98b67ece5b9b3607bebf4125a; classtype:domain-c2; sid:2032276; rev:1; metadata:attack_target Client_and_Server, created_at 2021_03_22, deployment Perimeter, performance_impact Low, confidence High, signature_severity Major, tag SSL_Malicious_Cert, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2021_03_22, mitre_tactic_id TA0011, mitre_tactic_name Command_And_Control, mitre_technique_id T1071, mitre_technique_name Application_Layer_Protocol;)