Versions (2)
Version DetailsCurrent
Rev: 1 • Feb 3, 2026, 12:00 PMET MALWARE Cobalt Strike Related Domain in DNS Lookup (cdncheck .it .com)
alert dns $HOME_NET any -> any any (msg:"ET MALWARE Cobalt Strike Related Domain in DNS Lookup (cdncheck .it .com)"; dns.query; bsize:15; content:"cdncheck.it.com"; nocase; reference:url,securelist.com/notepad-supply-chain-attack/118708/; classtype:trojan-activity; sid:2067281; rev:1; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, affected_product Notepad__, attack_target Client_Endpoint, created_at 2026_02_03, deployment Perimeter, malware_family Cobalt_Strike, performance_impact Low, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2026_02_03, mitre_tactic_id TA0011, mitre_tactic_name Command_And_Control, mitre_technique_id T1071, mitre_technique_name Application_Layer_Protocol;)
Feb 3, 2026, 12:00 PM
Feb 3, 2026, 12:00 PM
Feb 3, 2026, 10:34 PM
Feb 4, 2026, 10:34 PM
rules/emerging-malware.rules