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#FortiGuardLabs has uncovered a long-running supply chain compromise targeting QuickFox, a Windows VPN/network acceleration application primarily used by overseas Chinese users. Attackers tampered with official Windows installers to deploy a custom backdoor tracked as FDMTP, enabling selective victim profiling and post-compromise access.
Learn more: https://fortiguard.fortinet.com/outbreak-alert/quickfox-supply-chain-attack
Subscribe to our Outbreak Alerts: https://www.fortinet.com/fortiguard/outbreak-alert-subscription
Read our blog: https://www.fortinet.com/blog
Date: August 25, 2026











