The U.S. Treasury has sanctioned three Chinese nationals and three Thailand-based companies for their involvement in a cybercrime network linked to the 911 S5 botnet. This botnet, described as likely the world's largest, infected over 19 million IP addresses globally and was used to facilitate $5.9 billion in fraudulent COVID-19 relief claims, unemployment fraud, and other cybercrimes including bomb threats and child exploitation. The U.S. Department of Justice (DOJ) announced the arrest of a Chinese national, YunHe Wang, who is accused of operating the botnet. The international law enforcement operation led to the dismantling of the botnet, the seizure of $30 million in assets, and the disruption of 23 domains and over 70 servers.