US freezes $130M in Iran-linked USDT wallets to disrupt illicit financing.

On Tuesday, the U.S. Treasury's Office of Foreign Assets Control sanctioned multiple cryptocurrency wallets tied to Iran's Central Bank and the Islamic Revolutionary Guard Corps, with stablecoin issuer Tether freezing over $131 million across four addresses on the Tron blockchain. Treasury Secretary Scott Bessent confirmed the move in a post on X, vowing the U.S. would "aggressively follow the money and deny the Iranian regime access" to illicit funds. Separately, the Treasury sanctioned seven individuals linked to a global weapons procurement network for the Iranian armed forces and IRGC, including a Tehran-based drone parts supplier, a Nigerian intermediary, and Russian nationals tied to a Moscow aviation company. The action is the latest in a campaign branded Operation Economic Fury.

Background

Iran has spent years building a crypto infrastructure to circumvent sanctions. The country legalized Bitcoin mining in 2019 and turned to USDT to stabilize a rial in freefall and settle international trade. USDT, a digital token issued by Tether pegged one-to-one to the U.S. dollar, runs on blockchains like Ethereum and Tron, outside the banking system Iran has been largely cut off from for years. Because Tether issues the token, it retains the ability to freeze specific wallet addresses at the software level, rendering the funds immovable. Blockchain is what makes this enforcement possible—and what makes Iran's crypto workaround less safe than it looks. Transactions on public networks like Tron are permanently visible, and U.S. agencies work alongside analytics firms to trace how money moves. The more centralized a blockchain or crypto solution is, the more prone it is to being censored. TRM Labs' Ari Redford told Bloomberg in April that law enforcement can "track and trace the flow of funds to build cases—and potentially seize them" when actors try to cash out at regulated exchanges, which must comply with US rules. "It has become this cat and mouse game between the IRGC financial facilitators and National Security (Agencies) to try to stop Iran from offraping," he said. Blockchain analytics firm Chainalysis tracked nearly $8 billion in attributed Iranian crypto volume in 2026—TRM argues it's almost $10 billion—with IRGC-associated addresses accounting for more than half of the country's inflows in the final quarter of that year.

What happened

According to Decrypt, the U.S. Treasury's Office of Foreign Assets Control sanctioned multiple cryptocurrency wallets tied to Iran's Central Bank and the Islamic Revolutionary Guard Corps on Tuesday. Stablecoin issuer Tether froze over $131 million across four addresses on the Tron blockchain. Treasury Secretary Scott Bessent confirmed the move in a post on X, vowing the U.S. would "aggressively follow the money and deny the Iranian regime access" to illicit funds. Separately, the Treasury sanctioned seven individuals linked to a global weapons procurement network for the Iranian armed forces, IRGC—including a Tehran-based drone parts supplier, a Nigerian intermediary, and Russian nationals tied to a Moscow aviation company. Tuesday's freeze is the latest move in a campaign branded Operation Economic Fury. In April, Tether froze $344 million in USDT across two other Tron addresses tied to Iran's central bank. By May, Bessent said the U.S. had seized roughly $1 billion in Iranian crypto total since the campaign began. In June, the Treasury sanctioned Iran's four largest exchanges, including Nobitex, which alone processed more than half of the country's digital asset volume in 2025. Tether says it now works with more than 340 law enforcement agencies across 65 countries and has frozen more than $4.4 billion in assets since it began coordinating with authorities, including more than $2.1 billion tied to US enforcement actions. The Decrypt story was updated after publication for clarity.

Market impact

The sources provide several figures on Iranian crypto flows and prior enforcement actions. Blockchain analytics firm Chainalysis tracked nearly $8 billion in attributed Iranian crypto volume in 2026, while TRM argues it's almost $10 billion, with IRGC-associated addresses accounting for more than half of the country's inflows in the final quarter of that year. In April, Tether froze $344 million in USDT across two other Tron addresses tied to Iran's central bank. By May, Treasury Secretary Bessent said the U.S. had seized roughly $1 billion in Iranian crypto total since Operation Economic Fury began. In June, the Treasury sanctioned Iran's four largest exchanges, including Nobitex, which alone processed more than half of the country's digital asset volume in 2025. Tether says it now works with more than 340 law enforcement agencies across 65 countries and has frozen more than $4.4 billion in assets since it began coordinating with authorities, including more than $2.1 billion tied to US enforcement actions. The sources do not provide price reactions or broader market moves following the freeze.

Why it matters

The freeze demonstrates how centralized stablecoins like USDT can be used as a tool of sanctions enforcement. Because Tether issues the token, it retains the ability to freeze specific wallet addresses at the software level, rendering the funds immovable. Blockchain is what makes this enforcement possible—and what makes Iran's crypto workaround less safe than it looks. Transactions on public networks like Tron are permanently visible, and U.S. agencies work alongside analytics firms to trace how money moves. The more centralized a blockchain or crypto solution is, the more prone it is to being censored. TRM Labs' Ari Redford told Bloomberg in April that law enforcement can "track and trace the flow of funds to build cases—and potentially seize them" when actors try to cash out at regulated exchanges, which must comply with US rules. "It has become this cat and mouse game between the IRGC financial facilitators and National Security (Agencies) to try to stop Iran from offraping," he said. The action is part of a broader campaign that has already seen $344 million frozen in April and roughly $1 billion seized by May, according to Bessent.