US Sanctions Russian Exploit Broker Over Stolen US Cyber Tools

### Executive Summary The U.S. government sanctioned Sergey Zelenyuk and Matrix LLC (Operation Zero) after an insider at a U.S. defense contractor stole eight proprietary cyber tools and sold them for cryptocurrency; the report names the insider (Peter Williams), several associates and firms, and notes that the stolen capabilities were sold to unauthorized users and may be repurposed for extracting private data via AI, prompting application of sanctions under the Protecting American Intellectual Property Act.