OFAC designates Iran's crypto sector as sanctionable after $1 billion freeze

Washington has formally placed Iran's entire digital-asset economy under US sanctions, handing the Treasury's Office of Foreign Assets Control a legal basis to freeze roughly $1 billion in Bitcoin and Tether-linked holdings already targeted since April.

"Our objective is to sever every economic lifeline that sustains this tyrannical regime until Tehran stands alone," Treasury Secretary Scott Bessent said in announcing the Aug. 24 designation, which rests on Executive Order 13902, a rule that lets OFAC sanction entire economic sectors rather than picking off entities one by one.

The move formalizes months of escalating action. In June, OFAC sanctioned four Iranian exchanges — Nobitex, Wallex, Bitpin and Ramzinex — along with two Nobitex executives. Blockchain analytics firm Chainalysis estimates Iran's crypto ecosystem topped $7.8 billion in 2025, with wallets tied to the Islamic Revolutionary Guard Corps accounting for more than half of fourth-quarter on-chain activity.

The sector-wide designation extends US reach beyond exchanges to stablecoin issuers and the brokers who convert crypto into oil revenue. Tether blocked $344 million in USDT in April and froze another $131 million in July after OFAC flagged central bank wallets holding more than $165 million in stablecoins.

Central Bank's USDT Reserve Sidesteps the Dollar System

Elliptic traced at least $507 million in USDT purchases by Iran's central bank to leaked 2025 documents, with most flowing through Nobitex before shifting to a cross-chain bridge after a mid-2025 hack. Researchers describe the stash as a sanction-resistant reserve built outside the dollar system to defend the rial, which has lost close to 90 percent of its value to inflation and sanctions. Nobitex processes about half of Iran's crypto trading and reports 11 million registered users.

The same enforcement package, dubbed Operation Economic Outcast, sanctioned a Ukrainian broker accused of routing more than $100 million in crypto-based oil payments for the IRGC's Quds Force, its foreign paramilitary arm. That action shows the Treasury's Iran campaign is reaching intermediaries who help convert digital assets into real-world revenue, not just the platforms that move them.

Mining Turns Subsidized Power Into Untraceable Currency

Sanctions can freeze wallets but cannot easily stop electricity from becoming currency. The IRGC leans on subsidized power to mine Bitcoin, converting cheap energy directly into a form of money harder to trace than bank transfers, and Iran has used crypto to charge tolls on ships passing through the Strait of Hormuz. Elliptic estimates Iran controls about 4.5 percent of global Bitcoin mining, and roughly $10 billion in crypto moved through the country in 2025.

The standoff looks set to escalate. As Chainalysis and Elliptic sharpen their tracing tools, Tehran keeps shifting stablecoin flows to new bridges and exchanges — a pattern seen when activity moved off Nobitex after its hack. For exchanges and stablecoin issuers outside Iran, the designation raises the cost of screening for sanctioned wallets, since newly mined coins carry no flagged transaction history that analytics firms can freeze.

This article is for informational purposes only and does not constitute investment advice.