Nefilim and Hive affiliate Artem Stryzhak sentenced to nearly six years
Original title: Ukrainian ransomware hacker sentenced, $11 million reward offered for co-conspirator
The State Department is offering up to $11 million for co-conspirator Volodymyr Tymoshchuk; Hive hit about 1,500 victims worldwide.
Artem Stryzhak, 36, a Ukrainian national, was sentenced to five years and 10 months after pleading guilty in December 2025 to conspiracy counts tied to ransomware. He was arrested in Spain in June 2024 and extradited to the United States in April 2025. Court documents say he was a Nefilim affiliate from about June 2021 through at least October 2021 and later an early Hive affiliate who helped deploy Hive against seven victims, including healthcare providers. The FBI says the groups caused more than $100 million in losses. Investigators still seek charged co-conspirator Volodymyr Tymoshchuk.
Unconfirmed: Loss figures and victim counts come from court documents and officials, not independently detailed victim lists.
- Stryzhak agreed to pay Nefilim administrators 20 percent of ransom proceeds.
- In June 2021 he stole data from an oil and gas transportation company.
- Nefilim preferred US, Canadian, or Australian firms with over $100 million in revenue.
- The FBI gave one Hive victim a decryption key so it avoided paying a ransom.
- Hive attacked about 1,500 victims worldwide between June 2021 and January 2023.
Impact: Ransomware encryption and data theft at businesses and healthcare providers
- Organizations
- FBIUS Department of State
From the original article
2 min read at helpnetsecurity.com
A Ukrainian national who participated in ransomware attacks targeting hospitals, government entities, law firms, and other businesses was sentenced to five years and 10 months in prison. Artem Stryzhak, 36, pleaded guilty in December 2025 to two counts of conspiracy to commit fraud, extortion, and related activity in connection with computers.
By Anamarija Pogorelec · helpnetsecurity.com
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