Top Ukrainian Mobile Operator Kyivstar Hit by Cyberattack

[rbc]

Ukrainian telecom operator Kyivstar was the target of a cyberattack that knocked internet access and mobile communications offline on the same day Ukrainian President Volodymyr Zelenskyy is in Washington to boost the case for additional military aid.

The operator said in a Tuesday post on Facebook that personal data of subscribers appears to have not been compromised. The Netherlands parent company said Kyivstar technical teams are working with Ukrainian authorities "to determine the circumstances and consequences of the interference in the Kyivstar network." Telemetry monitored by internet observer NetBlocks showed that Kyivstar's connectivity had "collapsed" early on Tuesday morning.

Market analysis firm Telegeography calculated that Kyivstar accounts for roughly half of Ukraine's mobile subscriber base have been affected. Reuters reported that Kyivstar has 24.3 million mobile subscribers and more than 1.1 million home internet subscribers.
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Top Ukrainian Mobile Operator Kyivstar Hit by Cyberattack