[U.S. Treasury Department Uses PAIPA for the First Time to Sanction Zero-Day Exploit Broker Network] The U.S. Treasury Department's Office of Foreign Assets Control (OFAC), under the Protecting American Intellectual Property Act (PAIPA) and related executive orders, has added the Russian exploit broker network and its associated individuals and entities to the sanctions list. This network, operated by Sergey Sergeyevich Zelenyuk and his company Matrix LLC (Operation Zero), is accused of acquiring and reselling at least eight proprietary cyberattack tools stolen from a U.S. company, which were intended exclusively for use by the U.S. government and its allies. Australian national Peter Williams has pleaded guilty to stealing trade secrets between 2022 and 2025, selling the aforementioned tools to Operation Zero, and receiving millions of dollars in cryptocurrency. Assets related to the sanctioned parties in the U.S. will be frozen, and U.S. persons are generally prohibited from conducting transactions with them. Violations may result in civil or criminal penalties.