North Korea-linked ScarCruft’s Ruby Jumper uses Zoho WorkDrive C2 and USB malware to breach air-gapped systems for ...
IntroductionIn December 2025, Zscaler ThreatLabz discovered a campaign linked to APT37 (also known as ScarCruft, Ruby Sleet, and Velvet Chollima), which is a DPRK-backed threat group. In this campaign ...
A convincing lookalike of the popular Huorong Security antivirus has been used to deliver ValleyRAT, a sophisticated Remote Access Trojan (RAT) built on the Winos4.0 framework, to users who believed ...
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