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Rev: 1 • Mar 20, 2024, 12:00 PMET MALWARE Observed Fenix Botnet Domain (citas-sat2023 .com .mx in TLS SNI)
alert tls $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Observed Fenix Botnet Domain (citas-sat2023 .com .mx in TLS SNI)"; flow:established,to_server; tls.sni; bsize:20; content:"citas-sat2023.com.mx"; fast_pattern; reference:url,www.metabaseq.com/fenix-botnet/; classtype:trojan-activity; sid:2051731; rev:1; metadata:attack_target Client_Endpoint, created_at 2024_03_20, deployment Perimeter, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_03_20, mitre_tactic_id TA0011, mitre_tactic_name Command_And_Control, mitre_technique_id T1071, mitre_technique_name Application_Layer_Protocol;)
Mar 20, 2024, 12:00 PM
Mar 20, 2024, 12:00 PM
Sep 21, 2024, 3:00 AM
Aug 12, 2025, 9:34 PM
rules/emerging-malware.rules