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Policy

U.S. Targets Crypto Exchanges Garantex and Grinex in Major Ransomware and Sanctions Evasion Crackdown

By ToTo BugelmanNewcomer0 rep· 8/15/2025

The U.S. Treasury has escalated its crackdown on illicit cryptocurrency activities by imposing new sanctions on Garantex and its successor platform, Grinex. These measures target the exchanges for their alleged ties to ransomware operations and for facilitating sanctions evasion. The Treasury also sanctioned key executives and affiliated companies involved in laundering digital assets for cybercriminals.

 

Key Takeaways

  • Garantex and Grinex are sanctioned for their involvement with ransomware groups and sanctions evasion.

  • Three senior executives and six affiliated companies are also targeted.

  • Garantex allegedly used a ruble-backed stablecoin, A7A5, to help Russian customers move frozen assets.

  • Indictments have been unsealed against two Garantex executives, with rewards offered for information leading to their arrest.

  • The sanctions aim to disrupt illicit financial flows and deter future criminal activity.

 

U.S. Treasury Intensifies Crypto Crackdown

The U.S. Treasury Department, through the Office of Foreign Assets Control (OFAC), has taken significant action against cryptocurrency exchanges Garantex and Grinex. Garantex, previously sanctioned in April 2022 for operating within Russia's financial sector, has been redesignated. Its successor platform, Grinex, is now also under sanctions, along with three senior executives and six associated companies in Russia and Kyrgyzstan. These entities are accused of laundering digital assets for cybercriminals and supporting ransomware operators.

 

Ransomware Links and Sanctions Evasion

Officials stated that Garantex continued to facilitate transactions for prominent ransomware groups, including Conti, LockBit, and Black Basta, even after its initial sanctioning. The exchange is also linked to sanctioned money launderer Ekaterina Zhdanova. To circumvent existing sanctions, Garantex allegedly moved customer funds to Grinex. This move followed a coordinated international operation in March that resulted in the freezing of $26 million in cryptocurrency and the seizure of Garantex's web domain. Additionally, Tether froze $27 million in USDT held on the Garantex platform.

 

Legal Actions and Rewards

Prosecutors have unsealed indictments against two Garantex executives, Aleksandr Mira Serda and Aleksej Bešciokov, charging them with money laundering conspiracy and operating an unlicensed money-transmitting business. Bešciokov has been arrestado en India, while Mira Serda remains at large. The Department of State has announced substantial rewards for information leading to the arrest and conviction of Mira Serda and other key leaders, offering up to $5 million for Mira Serda and $1 million for others.

 

Broader Implications

The sanctions extend to Grinex, A7, its subsidiaries, and Old Vector for their role in facilitating sanctions evasion. Companies like InDeFi Bank and Exved were also sanctioned for aiding in cross-border crypto transactions that bypass U.S. restrictions. These actions are part of a wider U.S. strategy to dismantle cybercriminal infrastructure, following recent operations against the BidenCash dark web marketplace and the BlackSuit ransomware group. The Treasury emphasized that sanctions are intended to change behavior and noted a process for removal from the Specially Designated Nationals (SDN) List for those demonstrating compliance.

 

Sources

 

This article was created with support from AI-driven technology, drawing on multiple reputable sources. The final content has been thoroughly reviewed and edited by BlockzHub's editorial team to ensure accuracy, clarity, and coherence. Original reporting sources are credited whenever appropriate and as required. The opinions expressed in this article do not necessarily represent the official views or positions of BlockzHub. This article is intended for informational purposes only and should not be considered financial or professional advice. Investing involves risk, and you should consult a qualified financial advisor before making any investment decisions.

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U.S. Targets Crypto Exchanges Garantex and Grinex in Major Ransomware and Sanctions Evasion Crackdown | BlockzHub