The Ukrainian Blackjack hacker group launched a cyberattack against Rosvodokanal, Russia’s largest private water supply company, as “revenge for the attack on Kyivstar.”
From Euromaiden Press BY IRYNA VOICHUK

Ukrainian hackers, allegedly affiliated with the Security Service of Ukraine (SBU), have launched a significant cyber operation against Rosvodokanal, Russia’s largest private water supply company serving 7 million consumers, Liga media outlet reported, citing an undisclosed source.
The source described this operation as “revenge for the attack on Kyivstar.”
On the morning of 12 December, the largest Ukrainian telecommunications operator Kyivstar, and one of the country’s leading banks, Monobank, came under a hacker attack, which caused a technical failure and made mobile communications and Internet access unavailable.
On 20 December, the Blackjack hackers group orchestrated a powerful cyberattack, crippling the IT infrastructure of Rosvodokanal, Liga reported.