OFAC sanctions 134 ISIS-K crypto wallet addresses as Tether freezes 131 Tron wallets

The US Department of the Treasury’s Office of Foreign Assets Control (OFAC) added 134 cryptocurrency wallet addresses tied to ISIS-Khorasan (ISIS-K) to its Specially Designated Nationals (SDN) list on Wednesday. For high-risk PSPs, the part that matters is simple: sanctioned crypto infrastructure is increasingly being mapped, listed, and then frozen at the stablecoin layer.

1. OFAC said the 134 addresses belong to ISIS-K, which has been a Specially Designated Global Terrorist since September 2015. The new listings cover digital asset addresses alongside individuals and entities already tracked through the SDN regime, which OFAC uses for terrorism, narcotics trafficking and other illicit activity.
2. According to blockchain forensics company Chainalysis, Tether froze the balances associated with 131 Tron addresses. The remaining three sanctioned addresses were on the Monero network, which matters operationally because the freeze action happened on a traceable stablecoin rail, not on every network in the set.
3. Chainalysis said the 131 Tron addresses received over $1.4 million in crypto donations since 2023 and sent over $880,000. In other words, these were not dormant labels on a sanctions list; they were active flows with funds moving in and out over time.
4. The latest action came more than a week after OFAC sanctioned three individuals and six entities across Europe, the Middle East and West Africa on June 22, including Syria-based MSB Bitcoin Xchange and Turkish MSB Spider. OFAC said that earlier round targeted “key facilitators who enable ISIS to move funds among its regional affiliates.”
5. Chainalysis also said ISIS-K has historically solicited crypto through donation campaigns on websites and messaging platforms, and that it identified donation addresses on Tron, Monero and the Bitcoin network with exposure to mainstream services, including wallets that sent funds to Syria-based cryptocurrency exchanges. For compliance teams, that is the usual headache: illicit wallets do not stay neatly isolated from ordinary rails.

Blockchain analytics has become part of sanctions enforcement, not just postmortem reporting. TRM Labs said in April that onchain evidence helped secure the conviction of three individuals for terrorism financing in Indonesia in 2024 and 2025, with wallet addresses, transaction histories and on-chain flows presented as admissible evidence.