The US Treasury's Office of Foreign Assets Control (OFAC) froze more than $130 million in cryptocurrency wallets tied to Iran's Central Bank and the Mohammad Hossein Shamkhani network on July 15, 2026. Shamkhani is an Iranian national whose financial network spans more than 50 entities and vessels. Treasury Secretary Scott Bessent confirmed the action. Treasury described the Shamkhani network as "one of the regime's most profitable engines, built on deception."

The freeze is the fourth major enforcement layer in a coordinated five-month campaign that the Treasury has branded Operation Economic Fury.

The wallets targeted in the July action held assets primarily in USDT (a dollar-pegged stablecoin running on the TRON blockchain), along with bitcoin and ether. OFAC cited three legal authorities for the freeze: Executive Order 13902 covering Iran's financial sector, Executive Order 13224 targeting terrorism financing, and National Security Presidential Memorandum 2. The Central Bank of Iran has been under OFAC sanctions since 2019 over connections to terrorism financing.

---

A campaign timeline built in layers

Operation Economic Fury began in January 2026 with designations against Zedcex and Zedxion, two exchange infrastructure companies linked to Iran's Islamic Revolutionary Guard Corps (IRGC) that had processed roughly $1 billion in volume. In April, OFAC coordinated with stablecoin issuer Tether to freeze $344.2 million in USDT held in two TRON wallet addresses directly tied to the Central Bank of Iran. That was the largest single on-chain seizure of Iranian state-linked crypto on record. On May 29, Bessent announced at the Reagan National Economic Forum that cumulative seizures had crossed $1 billion. "Just outright grabbed the wallets," he said at the forum. "Some of them may be typing in right now and might not realize their wallet had been grabbed."

What Treasury called its largest-ever enforcement action against a nation's digital asset ecosystem came on June 2, when OFAC designated Iran's four biggest domestic crypto exchanges: Nobitex, Wallex, Bitpin, and Ramzinex. According to blockchain analytics firm TRM Labs, those four platforms accounted for $7.7 billion, or approximately 78 percent, of Iran's total attributed crypto volume of $9.9 billion in 2025. Nobitex alone held more than half of Iranian crypto inflows and had roughly 11 million registered users. Four exchange executives were also designated, including Nobitex chairman Amir Hossein Rad and current CEO Seyed Ali Khoee. Two of the four designated executives, co-founders Seyed Mohammad Ali Aghamir and Seyed Mohammad Aghamir, are members of the politically connected Kharrazi family.

Bessent said Wednesday that Treasury intends to keep up the pressure. "We will continue to aggressively follow the money and deny the Iranian regime access to the proceeds of its illicit revenue schemes," he said.

---

Why this matters beyond US borders

The enforcement has direct practical consequences for exchanges and users in South Asia and Africa, even those with no connection to Iran. The mechanism is secondary sanctions: OFAC has warned that any non-US financial institution processing transactions for designated Iranian entities after June 2 risks losing access to the US financial system. That warning applies to exchanges in Pakistan, India, Nigeria, Kenya, and South Africa that rely on dollar correspondent banking to settle trades.

FinCEN, the US financial intelligence unit, issued an IRGC alert on May 11, 2026, flagging P2P trading platforms, stablecoin flows from petroleum and shipping firms, and nested virtual asset service providers (VASPs) as high-risk categories. Analysts at GlobalLedger interpreted the alert as identifying P2P platforms and nested VASPs as the most likely channels through which displaced Iranian volume will seek new exit routes.

TRON-based USDT is the dominant stablecoin in both the South Asian remittance corridor and Nigerian retail crypto markets, increasing the likelihood that blockchain analytics firms will subject those flows to heightened scrutiny.

The Tether freeze in April set a precedent that users and developers should understand clearly. Tether froze $344 million without a court order, acting directly on OFAC instruction. USDT holders in any jurisdiction should know that stablecoin issuers can block funds unilaterally and without advance notice. OFAC requires exchanges to update SDN screening lists and block designated addresses within 10 business days of a new designation. Exchanges in the region that have not yet integrated SDN (Specially Designated Nationals) screening tools from providers such as Chainalysis, TRM Labs, or Elliptic face both legal exposure and the risk of losing banking relationships as partners conduct their own de-risking reviews. The US government's Rewards for Justice program separately offers up to $15 million for information that disrupts IRGC financial networks, a resource compliance professionals and developers encountering suspicious wallet activity may find relevant.

---

What comes next

The July 15 freeze arrived one day after the United States implemented a naval blockade of Iran involving more than 20 warships and hundreds of aircraft, signaling that the sanctions campaign is tracking alongside a broader geopolitical escalation.

Chainalysis and TRM Labs noted in their June analysis that additional exchange infrastructure with significant Iran-linked exposure remains undesignated, suggesting further enforcement rounds are likely.

Before this campaign began, Iran was moving an estimated $400 to $500 million per month through crypto to evade traditional banking sanctions. With 78 percent of its attributed domestic crypto volume now cut off at the exchange level and more than $1 billion seized or frozen, the question for compliance teams across South Asia and Africa is not whether more action is coming, but which wallets and platforms will be named next.