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A Russian national accused of laundering proceeds from Ryuk ransomware pleaded not guilty during his first U.S. court appearance Wednesday after extradition from the Netherlands.
Denis Mihaqlovic Dubnikov, 29, allegedly laundered more than $400,000 worth of ransom payments often obtained from hospitals. Cybercriminals deploying Ryuk went on a fall 2020 ransomware binge that seized the IT systems of hundreds of U.S. medical centers in a spree amounting to one of the largest cyberattacks against the healthcare sector.