Treasury Targets 134 Crypto Wallets Tied to ISIS-K Fundraising Network

The U.S. Office of Foreign Assets Control (OFAC) has added 134 cryptocurrency wallet addresses linked to the Islamic State Khorasan Province (ISIS-K) to its official sanctions list, marking one of the largest single-action wallet designations targeting the militant group to date.

According to blockchain analytics firm Chainalysis, 131 of the 134 sanctioned addresses operate on the Tron network. Those wallets collectively received more than $1.4 million in cryptocurrency donations, funds that U.S. authorities say were used to support ISIS-K operations and financing activities.

Stablecoin issuer Tether moved to freeze the funds held in the designated wallets following the OFAC action. The freeze prevents any further movement or liquidation of assets stored at those addresses, effectively cutting off access to the accumulated crypto holdings.

The coordinated designation-and-freeze approach reflects a growing pattern of cooperation between U.S. sanctions authorities and major stablecoin issuers. Tether has previously responded to OFAC and law enforcement requests by immobilizing wallets flagged for illicit activity, and the company's ability to enforce freezes directly on-chain has become an increasingly significant tool in countering terrorist financing through digital assets.

ISIS-K, the Afghanistan-based affiliate of the Islamic State, has been identified by Western intelligence agencies as an active user of cryptocurrency for cross-border fundraising, circumventing traditional financial system controls. The group has relied on decentralized and pseudonymous transfer mechanisms to solicit and move funds across jurisdictions.

The Tron blockchain's prevalence among the sanctioned addresses is notable. Tron-based USDT transactions have frequently appeared in illicit finance cases due to the network's low fees and high transaction throughput, making it attractive for both legitimate users and bad actors seeking efficient value transfer.

OFAC's sanctions designation means that U.S. persons and entities are prohibited from transacting with the listed wallet addresses. Any assets held in those wallets within U.S. jurisdiction are subject to blocking, and violations can carry substantial civil and criminal penalties.

Chainalysis, which provided on-chain data supporting the action, has worked alongside U.S. government agencies on previous terrorist-financing investigations involving cryptocurrency. The firm's tracing capabilities allow investigators to map donation flows and identify clustering patterns across blockchain networks, enabling more targeted enforcement actions like the one announced against ISIS-K-linked wallets.