UNC5221

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China-Linked Hackers Hit US Tech Firms with BRICKSTORM Malware

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China-Linked Hackers Hit US Tech Firms with BRICKSTORM Malware

China-backed UNC5221 targets US legal and tech firms by deploying BRICKSTORM malware on neglected VMware and Linux/BSD appliances, Google's Mandiant reports.

September 25, 2025