Overview

• 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.