VERY IMPORTANT

This analysis examines a sophisticated Vidar infostealer variant that employs a custom virtual machine to obfuscate its malicious code through proprietary bytecode interpretation. The malware implements extensive anti-analysis measures including debugger detection via NtQueryInformationProcess and RDTSC timing checks, sandbox evasion by identifying antivirus processes and checking system resources, and environment fingerprinting. Vidar targets credentials from web browsers including Chromium and Gecko-based extensions, Azure authentication tokens, FileZilla FTP credentials, and captures screenshots. It utilizes SeDebugPrivilege for elevated access, creates hidden desktops for browser automation, and exfiltrates stolen data through Telegram channels. The malware performs cleanup operations to remove execution artifacts and proxies DLL execution through rundll32.exe to blend with legitimate Windows processes.