The attack on Kyivstar was probably the largest attack carried out by hackers since the beginning of the war.

The cyber attack on Kyivstar was probably one of the most devastating attacks in Ukraine since the beginning of February 2022. This is stated in the British Ministry of Defense intelligence report published on Saturday 16 December.

Attack on Kievstar

Ukraine’s largest mobile operator, Kyivstar, was cyber-attacked on December 12.

The fallout from the hacker’s prank lasted at least two days. Such a disruption in the mobile operator’s business affected both the company’s mobile services and data transfer services.

In particular, the cyber attack robbed users of the mobile operator’s signal and the ability to use the Internet. The company also guarantees that no personal data was compromised during the attack.

The cyber attack also disrupted the operation of air raid sirens and terminals of some banks, ATMs and retail outlets. Meanwhile, Monobank suffered a DDoS attack that disrupted access to the bank’s website.

This incident is likely to be one of the largest devastating cyberattacks on Ukrainian networks since the beginning of the full-scale invasion, as Ukraine’s government resources and emergency services are affected.
– summarizes intelligence.

Disruption in Kyivstar’s work: latest news

• As of the evening of December 15, the Kyivstar company restored access to mobile internet in the entire territory controlled by Ukraine. The 4G network has already started working. However, the company noted that mobile Internet may operate at low speed until the network is completely stable.
• Additionally, after Kyivstar’s failure in Lviv, there were problems with LeoKart cards. In particular, some cards cannot be verified because they are not activated.
• It was learned that Kyivstar was subjected to a powerful hacking attack by Russian hackers from the Sontsepok group. As Mykhailo Podolyak points out, such Russian operations have one goal: to demoralize the Ukrainians.