Trusted DesignA threat actor designated as Larva-26005, linked to North Korea, has been distributing Xctdoor backdoor malware to users in Korea since at least 2020. The campaign evolved from using CRAT malware alongside Hansom ransomware to deploying Xctdoor variants written in C++ and Go. Distribution methods include spear phishing emails with LNK files disguised as documents and security software installers. The malware utilizes DLL side-loading, deploys multiple script-based droppers, and installs XcLoader and Xctdoor backdoors in AppX package paths. Both CRAT and Xctdoor share identical code obfuscation techniques and installation paths. The backdoors provide comprehensive remote access capabilities including file operations, command execution, keylogging, screenshot capture, and credential theft. Recent attacks target corporate users through compromised web servers and ERP solutions.
Created: 2026-08-06
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