Targeting of Ukrainian telecommunications operator Kyivstar
Date of report
  • December 2023
Kyivstar, a mobile-phone network that serves over twenty-four million people in Ukraine, was hit by a cyberattack that knocked its entire network offline. Solntsepek, a hacktivist group associated with the Russian threat actor Sandworm, claimed responsibility for the attack.
Suspected victims
  • Kyivstar and its customers
Suspected state sponsor
  • Russian Federation
Type of incident
  • Data destruction
Target category
  • Private sector
Victim government reaction
  • Unknown
Policy response
Suspected state sponsor response