Versions (4)
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Rev: 2 • Nov 3, 2022, 12:00 PMET MALWARE Observed Malicious SSL Cert (Ursnif CnC)
alert tls $EXTERNAL_NET any -> $HOME_NET any (msg:"ET MALWARE Observed Malicious SSL Cert (Ursnif CnC)"; flow:established,to_client; tls.cert_subject; content:"CN=pinki.cyou"; bsize:13; fast_pattern; reference:url,www.mandiant.com/resources/blog/rm3-ldr4-ursnif-banking-fraud; classtype:trojan-activity; sid:2039692; rev:2; metadata:attack_target Client_Endpoint, created_at 2022_11_03, deployment Perimeter, deprecation_reason Age, malware_family ursnif, confidence High, signature_severity Major, tag SSL_Malicious_Cert, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_08_28, reviewed_at 2024_08_28;)
Nov 3, 2022, 12:00 PM
Aug 28, 2024, 12:00 PM
Sep 21, 2024, 3:00 AM
Aug 28, 2025, 9:34 PM
rules/emerging-malware.rules