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2CLoader: A New Malware Loader Delivering Vidar and Remus

IntroductionIn August 2026, Zscaler ThreatLabz identified a new loader, which we track as 2CLoader. ThreatLabz has observed the loader being used to distribute information stealers including Vidar and Remus in addition to XWorm RAT. 2CLoader has the ability to perform a wide range of anti-analysis and evasion…

Malware

VidarXWormZscaler

Zscaler ThreatLabz—Low

Vidar Adds Virtual Machine and Custom Stream Ciphers For String Obfuscation

IntroductionVidar is an information stealer that was first observed in 2018. Across its iterations, Vidar has continued to improve its string obfuscation to make detection and analysis more difficult by changing deobfuscation algorithms, constants, and primitives. From May through early September 2026, Zscaler…

Malware

VidarZscaler