Versions (5)
Version DetailsCurrent
Rev: 1 • Jun 18, 2020, 12:00 PMET MALWARE Observed Malicious SSL Cert (Cobalt Strike Malleable C2 Domain)
alert tls $EXTERNAL_NET any -> $HOME_NET any (msg:"ET MALWARE Observed Malicious SSL Cert (Cobalt Strike Malleable C2 Domain)"; flow:established,to_client; tls.cert_subject; content:"CN=time.updateeset.com"; nocase; endswith; reference:url,blog.malwarebytes.com/threat-analysis/2020/06/multi-stage-apt-attack-drops-cobalt-strike-using-malleable-c2-feature; classtype:domain-c2; sid:2030349; rev:1; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_and_Server, created_at 2020_06_18, deployment Perimeter, performance_impact Low, confidence High, signature_severity Major, tag SSL_Malicious_Cert, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_06_18, mitre_tactic_id TA0011, mitre_tactic_name Command_And_Control, mitre_technique_id T1071, mitre_technique_name Application_Layer_Protocol;)
Jun 18, 2020, 12:00 PM
Jun 18, 2020, 12:00 PM
Sep 21, 2024, 3:00 AM
Sep 17, 2025, 9:34 PM
rules/emerging-malware.rules