Russian hackers infiltrated Ukrainian telecom giant months before cyberattack

The Russian hackers behind the cyberattack on Ukraine’s largest telecom operator snuck into its infrastructure months before the December hack, according to Ukraine’s top cyber official. The attack on Kyivstar was “one of the highest-impact disruptive cyberattacks on Ukrainian networks” since Russia invaded the country last year. It left millions of Kyivstar subscribers without a

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