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Rev: 1 • Oct 30, 2020, 12:00 PMET MALWARE Observed BazarLoader Domain (gut45bg .xyz in TLS SNI)
alert tls $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Observed BazarLoader Domain (gut45bg .xyz in TLS SNI)"; flow:established,to_server; tls.sni; content:"gut45bg.xyz"; bsize:11; fast_pattern; reference:url,github.com/blacklotuslabs/IOCs/blob/main/domains_assoc_ryuk.txt; classtype:domain-c2; sid:2031157; rev:1; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2020_10_30, deployment Perimeter, malware_family BazarLoader, performance_impact Low, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_10_30, mitre_tactic_id TA0011, mitre_tactic_name Command_And_Control, mitre_technique_id T1071, mitre_technique_name Application_Layer_Protocol;)
Oct 30, 2020, 12:00 PM
Oct 30, 2020, 12:00 PM
Sep 21, 2024, 3:00 AM
Sep 15, 2025, 9:36 PM
rules/emerging-malware.rules