Blockchain analytics firm Arkham has released a public onchain map of crypto wallets linked to Iran's central bank, giving investigators and the public a new tool to trace financial flows associated with sanctioned entities. The map, published May 11, groups two TRC-20 wallets that the US Treasury's Office of Foreign Assets Control (OFAC) added to its Specially Designated Nationals list on April 24. These wallets were designated as property of Bank Markazi Jomhouri Islami Iran, with US officials citing connections to the Islamic Revolutionary Guard Corps-Qods Force and Hezbollah.
The OFAC action led to the freezing of approximately $344 million in crypto tied to Iran, marking one of the largest such seizures. Treasury Secretary Scott Bessent stated the effort aimed to "systematically degrade Tehran's ability to generate, move, and repatriate funds." Tether, the issuer of USDT, separately confirmed it had frozen the funds at the request of US authorities, describing the activity as "unlawful conduct," though it did not explicitly name Iran in its public statement.
Mapping the Onchain Footprint
Arkham's entity page for the Central Bank of Iran provides a starting point for analysts to follow the flow of funds from these sanctioned wallets to connected addresses. The two TRC-20 wallets are crucial because Tron's network has become a primary venue for stablecoin transfers due to its low fees and high speed. By making this data public, Arkham aims to increase transparency around how Iranian-linked entities use stablecoins and blockchain networks to move value outside traditional banking systems.
The mapping comes as US authorities intensify sanctions enforcement tied to terrorism financing and oil revenues. Blockchain analytics firms, such as Chainalysis and TRM Labs, have documented a multi-step "pipeline" used by Iran to convert oil revenues into stablecoins. In an April 27 note, Chainalysis described a process where Iranian oil proceeds were routed through brokers, intermediary wallets, cross-chain bridges, and decentralized finance protocols before eventually cycling back into accounts associated with the Central Bank of Iran and IRGC-linked entities.
Broader Context of Iranian Crypto Use
Iran's overall crypto transaction volume has grown significantly in recent years, reaching an estimated $11.4 billion in 2024 and $10 billion in 2025, according to a February report citing data from TRM Labs and Chainalysis. This growth is driven by the country's need to circumvent international financial sanctions that severely restrict its access to the global banking system. Crypto assets, particularly stablecoins pegged to the US dollar, allow Iranian entities to store and transfer value in a hard currency without relying on correspondent banks.
The TRC-20 standard on Tron is especially favored because it offers faster and cheaper transactions compared to Ethereum-based tokens. Tether has frozen over 500 million USDT across Ethereum and Tron in a recent 30-day period, with about 506 million of that on Tron, according to BlockSec's USDT Freeze Tracker. This indicates that Tether is actively cooperating with law enforcement to block sanctioned wallets, even as the underlying blockchain networks themselves do not have the ability to prevent individual transactions.
A TRON spokesperson emphasized that the network cannot monitor or block transactions independently but highlighted the T3 Financial Crime Unit, a collaboration between TRON, Tether, and TRM Labs launched in 2024, as the main channel for addressing abuse. The unit works with law enforcement "to freeze hundreds of millions of funds," including those tied to sanctioned entities and terror financing. Tether declined to comment further on the specific Iranian wallets.
Sanctions and Legal Ramifications
The US Treasury's designation of the two Tron wallets as property of Iran's central bank was a departure from traditional sanctions, which typically target physical assets or bank accounts domiciled in countries with ties to Iran. This action signals a growing willingness by US regulators to pursue crypto assets used by state actors to evade sanctions. The move also aligns with broader efforts by the Biden administration, and previously the Trump administration, to use financial tools to pressure Iran over its nuclear program, ballistic missile development, and support for proxy groups.
OFAC's SDN list now includes not only the wallets but also any entities or individuals transacting with them. This creates a significant risk for crypto exchanges, over-the-counter desks, and other intermediaries that may inadvertently handle funds from these addresses. Compliance teams must now screen against these onchain identifiers, a task that is more complex than traditional name-based screening because blockchain pseudonymity makes it difficult to verify the ultimate beneficiary owner of a wallet.
In April, Iran reportedly considered charging crypto-denominated tolls to ships transiting the Strait of Hormuz, positioning digital assets as an additional revenue channel outside traditional banking rails. While still a proposal, such a move would further entrench crypto in Iran's economic strategy and challenge international sanctions regimes. The idea is particularly controversial given that about 20% of the world's oil supply passes through the Strait of Hormuz, and any attempt to collect fees in crypto could be seen as an act of financial warfare.
Separately, Iran's largest crypto exchange, Nobitex, was reportedly linked to members of a powerful family with ties to Supreme Leader Ali Khamenei. The exchange has been used as a key conduit between domestic users and offshore liquidity, allowing Iranians to trade crypto with foreign entities despite the strict capital controls imposed by the Iranian government. The involvement of such high-level political figures underscores the central role of crypto in Iran's efforts to bypass sanctions.
Implications for the Crypto Ecosystem
The mapping by Arkham and the subsequent freezing of funds have broader implications for the stablecoin market and the blockchain analytics industry. Tether's willingness to freeze wallets at the request of US authorities sets a precedent that could deter other issuers from sanction evasion. However, it also raises questions about the extent to which a centralized stablecoin issuer can act as an arm of law enforcement, potentially conflicting with the decentralized ethos of blockchain technology.
Blockchain analytics firms like Arkham, Chainalysis, and TRM Labs are increasingly providing tools that allow governments and researchers to tag addresses associated with illicit activity. This transparency can be a powerful deterrent, but it also creates a cat-and-mouse dynamic where sanctioned entities attempt to obfuscate their trails using mixing services, cross-chain bridges, and privacy coins. Iran's use of multiple intermediary wallets and complex DeFi protocols suggests a high degree of sophistication in its sanctions evasion methods.
The US Treasury has repeatedly warned that digital assets could undermine the effectiveness of sanctions if left unchecked. In a 2025 report, the department outlined a strategy to work with industry partners to proactively identify and disrupt illicit financial flows in crypto. The cooperation with Tether on the $344 million freeze is a concrete example of this strategy in action. It also highlights the importance of public-private partnerships in maintaining the integrity of the global financial system.
As the Iran situation evolves, the onchain map provided by Arkham will likely be used by financial intelligence units, law enforcement agencies, and compliance officers around the world to monitor for future transactions involving these wallets. The map may also serve as a template for similar disclosures related to other sanctioned entities, such as North Korea or Russia, that are increasingly turning to crypto to fund their activities. The data may help identify new patterns of evasion and ultimately allow authorities to stay one step ahead of those seeking to abuse the crypto ecosystem for illicit purposes.
Source: Cointelegraph News