UNC5221 Uses BRICKSTORM Backdoor to Infiltrate U.S. Legal and Technology Sectors
- Posted on September 24, 2025
- By The Hacker News
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UNC5221 Uses BRICKSTORM Backdoor to Infiltrate U.S. Legal and Technology Sectors

UNC5221 uses BRICKSTORM malware to maintain 393-day stealthy access to U.S. SaaS, legal, and tech sectors.