MV Capital - US Treasury Freezes $131 Million in Iran-Linked Crypto Wallets

The US Treasury Department, working with Tether, froze approximately $131 million in USDT held in four Tron network wallets connected to Iran’s Central Bank amid escalating regional tensions

Background of the Action

The Office of Foreign Assets Control (OFAC) took steps to sanction multiple cryptocurrency wallets tied to the Central Bank of Iran. This resulted in the freezing of funds primarily in the form of USDT stablecoins on the Tron blockchain. Treasury Secretary Scott Bessent confirmed the development, stating that the action targets what officials describe as Iran’s use of digital assets for illicit financial activities.

On-chain investigator Specter first noted the freezes on four Tron wallets holding the combined amount. Tether implemented the blocks on these addresses following coordination with US authorities. Bessent linked the wallets directly to the Central Bank of Iran in his public statement.

“US Treasury is committed to disrupting and degrading Iran’s illicit financial activities, including its abuse of digital assets. We will continue to aggressively follow the money and deny the Iranian regime access to the proceeds of its illicit revenue schemes.”Treasury Secretary Scott Bessent

Timing and Regional Context

The freeze occurred as tensions between the US and Iran increased. US Central Command reported new military strikes on Iranian targets and the resumption of a naval blockade of Iranian ports. Iranian forces claimed drone strikes against US facilities in the region. These developments followed the breakdown of a previous ceasefire arrangement.

Officials positioned the crypto action within a larger set of measures aimed at restricting financial flows that could support sanctioned activities.

Connection to Previous Measures

This latest step builds on earlier enforcement actions. In April, Tether froze over $344 million in USDT across two Tron wallets that authorities connected to Iranian networks. That incident involved addresses with links to intermediaries and patterns associated with state-related activities.

US officials have referenced Operation Economic Fury, launched in March 2025, as the framework for these efforts. By May, authorities reported seizing or freezing nearly $1 billion in related crypto assets through the operation. In June, sanctions targeted several Iranian crypto exchanges, including Nobitex.

Timeline of Notable ActionsMarch 2025: Operation Economic Fury begins
April 2026: $344 million USDT freeze on Tron
May 2026: Reports of nearly $1 billion in total actions
July 2026: $131 million freeze announced

Role of Stablecoins and Blockchain Tracing

The use of USDT on Tron allowed for rapid tracing and blocking due to issuer controls and public ledger visibility. Tether has stated it collaborates with law enforcement agencies worldwide and maintains capabilities to restrict tokens at sanctioned addresses. Blockchain analytics firms like TRM Labs have supported such tracing efforts.

Funds in the recent case reportedly originated in part from withdrawals involving payment service provider DTC Pay and exchange Bitso, according to on-chain analysis.

Broader Sanctions Package

The crypto wallet designations formed part of a wider sanctions effort. OFAC targeted over 50 individuals, entities, and vessels linked to networks associated with Mohammad Hossein Shamkhani, described by officials as a key figure in Iranian oil export activities. This expanded existing sanctions on related networks.

Aspect	Details
Amount Frozen	Approximately $131 million in USDT
Network	Tron (four wallets)
Linked To	Central Bank of Iran
Issuer Action	Tether implemented freezes

Implications for Enforcement

These events demonstrate how centralized stablecoin issuers can respond to official requests by restricting token movement. Public blockchain data enables monitoring of flows, while issuer-level controls provide enforcement options not available in traditional banking systems for certain assets.

US Treasury statements indicate continued focus on tracking and restricting revenue sources tied to sanctioned programs. The combination of on-chain analysis, issuer cooperation, and formal designations forms the basis for these operations.