Versions (4)
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Rev: 2 • Jan 9, 2020, 12:00 PMET MALWARE Observed Malicious SSL Cert (ServHelper CnC)
alert tls $EXTERNAL_NET any -> $HOME_NET any (msg:"ET MALWARE Observed Malicious SSL Cert (ServHelper CnC)"; flow:established,to_client; tls.cert_subject; content:"CN=portofino.ug"; bsize:15; fast_pattern; reference:url,twitter.com/lazyactivist192/status/1214662422683885569; reference:md5,49a5cf0633b40d89b139ad3df85778c5; classtype:domain-c2; sid:2029245; rev:2; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_and_Server, created_at 2020_01_09, deployment Perimeter, deprecation_reason Relevance, performance_impact Low, confidence High, signature_severity Major, tag SSL_Malicious_Cert, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2023_03_01, mitre_tactic_id TA0042, mitre_tactic_name Resource_Development, mitre_technique_id T1587, mitre_technique_name Develop_Capabilities;)
Jan 9, 2020, 12:00 PM
Mar 1, 2023, 12:00 PM
Sep 21, 2024, 3:00 AM
Sep 22, 2025, 9:34 PM
rules/emerging-malware.rules