Kyivstar, the largest mobile network operator in Ukraine, was hit by a massive cyberattack on Tuesday, disrupting mobile and internet communications for millions of citizens.
Kyivstar has nearly 25 million mobile subscribers and more than 1 million home internet customers.
A system used to send air raid alerts in parts of Kyiv was also impacted.
The company's main website remains offline at the time of publishing.
The damaging attack appears to be the most impactful event in cyberspace to hit Ukraine since Russia's invasion in February 2022, when a cyberattack on Viasat crippled communications on the KA-SAT satellite network used by Ukraine's government and military, also impacting tens of thousands of modems across Europe.
The notorious pro-Russia hacker group Killnet claimed responsibility for the attack through a note on Telegram, but without any evidence to support the claim.
As of 20:00 Kyiv time on December 12, 2023, Kyivstar said it had partially restored the operation of fixed-line services.
In the weeks before and immediately after Russia launched its war against Ukraine on February 24, 2022, Russia appeared to intensify its attacks in cyberspace, with distributed denial-of-service attacks, disruptive wiper malware, and misinformation campaigns.
This Cyber News was published on packetstormsecurity.com. Publication date: Wed, 13 Dec 2023 15:43:05 +0000