The U.S. Treasury Department sanctioned more than 130 cryptocurrency wallet addresses this week tied to ISIS, with the overwhelming majority operating on the Tron blockchain.

The Treasury Department’s Office of Foreign Assets Control (OFAC) added 134 crypto wallets to existing sanctions on ISIS-K, the Islamic State’s affiliate operating in Afghanistan, Pakistan, and Central Asia. Of those addresses, 131 were on Tron and three on Monero.

The sanctioned Tron addresses have received more than $1.4 million since 2023 and sent over $880,000 during that period, according to blockchain analytics firm Chainalysis. The firm noted that stablecoin issuer Tether has frozen balances affiliated with all 131…