Winos 4.0 Malware Masquerades as VPN and QQBrowser to Target Users

A sophisticated malware campaign deploying Winos 4.0, a memory-resident stager, has been uncovered by Rapid7, targeting users through fake installers of popular software like LetsVPN and QQBrowser. Initially detected during a February 2025 Managed Detection and Response (MDR) investigation, this operation employs a multi-layered infection chain dubbed the Catena loader. It uses trojanized NSIS installers […]

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