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Threat Actors & CampaignsEmerging1 sourceAug 5, 2026 · 12:51via CyberInsider

QuickFox VPN installers were trojanized with malware for a year

Brief

QuickFox VPN installed a persistent backdoor on selected Windows computers, focusing on systems belonging to developers, administrators, translators, and cryptocurrency users. The attack was uncovered by Fortinet’s FortiGuard Incident Response Team while investigating modified QuickFox installers and related command-and-control infrastructure.

Researchers traced the compromise to two malicious lines added to an HTML file loaded when …

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