Versions (5)
Version DetailsCurrent
Rev: 1 • Sep 5, 2020, 12:00 PMET MALWARE Observed Malicious SSL Cert (Baka Skimmer Staging CnC)
alert tls $EXTERNAL_NET any -> $HOME_NET any (msg:"ET MALWARE Observed Malicious SSL Cert (Baka Skimmer Staging CnC)"; flow:from_server,established; tls.cert_subject; content:"CN=ordercheck.online"; nocase; fast_pattern; endswith; tls.cert_issuer; content:"C=US, O=Let's Encrypt, CN=Let's Encrypt Authority X3"; classtype:domain-c2; sid:2030839; rev:1; metadata:attack_target Client_and_Server, created_at 2020_09_05, deployment Perimeter, performance_impact Low, confidence High, signature_severity Major, tag SSL_Malicious_Cert, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_09_05, mitre_tactic_id TA0011, mitre_tactic_name Command_And_Control, mitre_technique_id T1071, mitre_technique_name Application_Layer_Protocol;)
Sep 5, 2020, 12:00 PM
Sep 5, 2020, 12:00 PM
Sep 21, 2024, 3:00 AM
Sep 16, 2025, 8:36 PM
rules/emerging-malware.rules