The attack wiped "almost everything", including thousands of virtual servers and PCs, [Illia Vitiuk, head of the Security Service of Ukraine's (SBU) cybersecurity department] said, describing it as probably the first example of a destructive cyberattack that "completely destroyed the core of a telecoms operator."
Kyivstar and the SBU believe the Russian military intelligence cyberwarfare unit known as Sandworm lingered in Kyivstar’s network since May 2023.