Versions (3)
Version DetailsCurrent
Rev: 2 • Sep 7, 2023, 12:00 PMET MALWARE Observed Malicious Debugging Application Related Domain (dbgsymbol .com in TLS SNI)
alert tls $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Observed Malicious Debugging Application Related Domain (dbgsymbol .com in TLS SNI)"; flow:established,to_server; tls.sni; bsize:13; content:"dbgsymbol.com"; fast_pattern; reference:url,blog.google/threat-analysis-group/active-north-korean-campaign-targeting-security-researchers/; classtype:targeted-activity; sid:2047951; rev:2; metadata:attack_target Client_Endpoint, created_at 2023_09_07, deployment Perimeter, deprecation_reason Age, performance_impact Low, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2023_12_11, reviewed_at 2023_12_11, mitre_tactic_id TA0011, mitre_tactic_name Command_And_Control, mitre_technique_id T1071, mitre_technique_name Application_Layer_Protocol;)
Sep 7, 2023, 12:00 PM
Dec 11, 2023, 12:00 PM
Sep 21, 2024, 3:00 AM
Aug 18, 2025, 8:35 PM
rules/emerging-malware.rules