Fraud Management & Cybercrime
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Ransomware
State Department Offers Up to $10M for Tips on Volodymyr Tymoshchuk

A hacker who federal prosecutors say was behind the LockerGoga and MegaCortex ransomware strains faces a seven count criminal indictment in U.S. federal court, prosecutors said Tuesday.
Ukrainian national Volodymyr Tymoshchuk, 28, served as an administrator of the two ransomware operations, prosecutors allege. Known online as “deadforz,” “Boba,” “msfv” and “farnetwork,” Tymoshchuk allegedly participated in a cybercriminal operation that from December 2018 through at least October 2021 extorted hundreds of companies across the globe with crypto-locking software and threats of data leakage.
An international police operation neutralized LockerGoga and MegaCortex ransomware in September 2022 by releasing decryption keys (see: LockerGoga Victims Get Free Decryptor; Police Recovered Keys).
More than 250 victim companies were located in the United States, prosecutors said. Known victims include cloud hosting provider iNSYNQ, chemical manufacturer Hexion and Dutch accounting software giant Wolters Kluwer (see: MegaCortex Ransomware Demands Millions From Victims).
One of the largest organizations to be hit with LockerGoga is Norwegian aluminum giant Norsk Hydro, which was attacked in March 2019. The company, which didn’t pay a ransom, estimated eight months later that the cost of the attack and required recovery operations could reach $71 million.
Tymoshchuk also participated in the Nefilim ransomware operation starting around July 2020, prosecutors say. The Tymoshchuk indictment also names Ukrainian national Artem Stryzhak as a Nefilim affiliate who hacked for the operation in exchange for keeping 80% of extortion proceeds. Spanish authorities extradited Stryzhak, 35, in April after arresting him in June 2024. Also spelled “Nephilim,” the group emerged in March 2020. Although apparently inactive, Nefilim cut a high profile earlier this decade, attacking appliances giant Whirlpool and hitting unpatched Citrix gateways.
The Department of State is offering up to $10 million for information that leads to Tymoshchuk arrest. It’s also offering up to $1 million for tips that lead to the convictions of other Nefilim, LockerGoga and MegaCortex ransomware hackers.