Treasury sanctions Russian zero-day broker accused of buying exploits stolen from US defense contractor

The U.S. Treasury sanctioned Russian firm Operation Zero, its founder Sergey Zelenyuk, a UAE affiliate Special Technology Services, and associates (including Advance Security Solutions personnel) for acquiring and reselling zero-day exploits and for allegedly trafficking in proprietary cyber tools stolen from a U.S. company; the actions are tied to concerns that these brokers sold powerful exploits to foreign intelligence agencies and could enable ransomware and other malicious activity.