Russian-Linked Hacker Group Claims Responsibility for Major Cyberattack on Ukraine's Kyivstar

The attack disrupted communications for millions and temporarily sabotaged Kyiv's air raid warning system, marking one of the most disruptive cyberattacks since Russia's invasion began.

The hacker group Solntsepek, linked to Russia's GRU military intelligence agency, has claimed responsibility for a cyberattack on Kyivstar, one of Ukraine's largest mobile and internet providers.
The attack disrupted communications for millions and temporarily sabotaged the air raid warning system in Kyiv.
Kyivstar's CEO, Oleksandr Komarov, stated that the attack significantly damaged the company's infrastructure and limited access, forcing a physical shutdown to limit the enemy's access.
The Ukrainian government has not yet publicly attributed the cyberattack to any known hacker group.
The attack is one of the most disruptive cyberattacks to have hit Ukraine since Russia's full-scale invasion began in February 2022.