Maksim Silnikau, a Belarusian-Ukrainian hacker, has been arrested and extradited to the United States. He is accused of being the mastermind behind several ransomware and exploit kits, including Angler, which infected over 100,000 devices and caused millions in damages. Known by the alias 'J.P. Morgan,' Silnikau is alleged to have pioneered the Ransomware-as-a-Service (RaaS) model. He appeared in a U.S. court to face charges related to his cybercriminal activities. This arrest highlights the growing reach and impact of cybercrime globally.