Versions (5)
Version DetailsCurrent
Rev: 4 • Dec 6, 2023, 12:00 PMET MALWARE Observed Teal Kurma Domain (upt .mcsoft .org in TLS SNI)
alert tls $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Observed Teal Kurma Domain (upt .mcsoft .org in TLS SNI)"; flow:established,to_server; tls.sni; dotprefix; content:".upt.mcsoft.org"; endswith; fast_pattern; reference:url,www.pwc.com/gx/en/issues/cybersecurity/cyber-threat-intelligence/tortoise-and-malwahare.html; classtype:domain-c2; sid:2049522; rev:4; metadata:attack_target Client_Endpoint, created_at 2023_12_06, deployment Perimeter, confidence High, signature_severity Major, tag SSL_TLS_SNI, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_07_04, mitre_tactic_id TA0011, mitre_tactic_name Command_And_Control, mitre_technique_id T1071, mitre_technique_name Application_Layer_Protocol;)
Dec 6, 2023, 12:00 PM
Jul 4, 2024, 12:00 PM
Sep 21, 2024, 3:00 AM
Aug 18, 2025, 8:35 PM
rules/emerging-malware.rules