https://www.bleepingcomputer.com/news/security/russian-hackers-wiped-thousands-of-systems-in-kyivstar-attack/ > The Russian hackers behind a December breach of Kyivstar, Ukraine's largest telecommunications service provider, have wiped all systems on the telecom operator's core network. > Following the incident, Kyivstar's mobile and data services went down, leaving most of its 25 million mobile and home internet subscribers without an internet connection.