Ukrainian Hacker’s Guilty Plea: Nefilim’s Notorious Ransomware Ring Exposed!

Ukrainian hacker Artem Stryzhak has pleaded guilty in the U.S. for his role in Nefilim ransomware attacks. Arrested in Spain and extradited in 2025, Stryzhak faces up to 10 years in prison. His co-conspirator, Volodymyr Tymoshchuk, remains at large with an $11 million bounty on his head.

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Hot Take:

Ransomware is the gift that keeps on giving — especially if you’re a cybercriminal! But, just like a bad holiday sweater, it eventually catches up with you. Artem Stryzhak learned this the hard way when he got extradited from Spain to the U.S. for his involvement in Nefilim ransomware attacks. Looks like he’ll be spending the next holiday season behind bars, rather than behind a computer screen.

Key Points:

  • Ukrainian Artem Stryzhak pleaded guilty to Nefilim ransomware attacks in the U.S.
  • He was arrested in Spain in 2024 and extradited to the U.S. in April 2025.
  • Stryzhak faces up to 10 years in prison for conspiracy to commit computer fraud.
  • Nefilim targeted high-revenue companies, causing millions in losses.
  • Co-conspirator Volodymyr Tymoshchuk remains at large with an $11 million reward for his capture.

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