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flag Chinese-linked hackers used advanced malware to infiltrate U.S. and Canadian government and IT networks via VMware flaws, maintaining access since April 2024.

flag U.S. and Canadian cybersecurity agencies warned on December 4, 2025, that Chinese-linked hackers used sophisticated malware, including a strain called "Brickstorm," to infiltrate and maintain long-term access to unnamed government and IT organizations. flag The attacks, targeting critical infrastructure and sensitive networks, exploited VMware vSphere systems to steal credentials and gain full control, with one confirmed case showing persistent access from April 2024 to at least September 2025. flag The joint advisory, issued by CISA, the NSA, and Canada’s cyber center, cited eight malware samples and noted similar intrusions across legal, software, and tech sectors. flag While no specific entities were named, the agencies stressed the threat of sabotage and the need for heightened defenses. flag The Chinese embassy denied involvement, and Broadcom urged customers to apply patches.

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