U.S. Treasury Formal Designation
The U.S. Department of the Treasury's Office of Foreign Assets Control (OFAC) has formally designated Iran's digital asset sector as sanctionable, further institutionalizing and normalizing years of enforcement actions against Iran's use of Bitcoin and the stablecoin USDT to evade sanctions. According to estimates by blockchain analytics firm Chainalysis, Iran's crypto ecosystem totaled more than $7.8 billion last year; in the fourth quarter, wallets linked to the Islamic Revolutionary Guard Corps (IRGC) accounted for more than half of on-chain activity.
Iranian Central Bank's Stablecoin Reserves and Flows
According to a report by blockchain analytics firm Elliptic, Iran's central bank holds at least $507 million in USDT, with related purchase records coming from leaked 2025 documents. Most of these stablecoins flow through Nobitex, the country's largest exchange, and shifted to cross-chain bridges after a mid-2025 hack. Analysts describe this arrangement as a “sanctions-proof reserve outside the traditional dollar system” used to support the rial; under the combined pressure of inflation and sanctions, the rial has lost nearly 90% of its value.
Sanctions, Freezes, and Crackdown on Exchanges
Since April, the U.S.-launched Operation Economic Fury has frozen or sanctioned about $1 billion in Iran-linked crypto assets. Tether froze $344 million in USDT in April; in July, after OFAC flagged Iranian central bank wallets holding more than $165 million in stablecoins, it froze another $131 million. In June, OFAC also sanctioned four exchanges—Nobitex, Wallex, Bitpin, and Ramzinex—and two Nobitex executives. On August 24, the office of Treasury Secretary Scott Bessent formally designated digital assets as a sanctionable sector within Iran's economy. The designation relies on Executive Order 13902, which allows OFAC to sanction an entire economic sector rather than only individual entities. The same sanctions package, named Operation Economic Outcast, also targeted a Ukrainian broker; OFAC said the broker processed more than $100 million in oil sales revenue linked to the Quds Force, the IRGC's overseas branch. Bessent said the goal is to cut off every economic lifeline sustaining the regime until Tehran is isolated.
Mining, Transit Fees, and the Ongoing Tug-of-War
Beyond transactions and reserves, Iran has also tried to use cryptocurrency to collect transit fees from ships passing through the Strait of Hormuz. The IRGC uses subsidized electricity for Bitcoin mining, converting power directly into harder-to-trace assets. As on-chain analytics continue to improve, the contest between Tehran's stablecoin workarounds and Washington's asset-freezing capabilities is expected to persist. This case also reminds the market that stablecoin reserve transparency, on-chain tracking, and compliance switching are becoming key variables in the global regulatory contest.
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