What the Shelbit and Aban Tether crypto sanctions tell us about tracing illicit finance

On 7 August 2026, the U.S. Department of the Treasury's Office of Foreign Assets Control (OFAC) designated two crypto exchanges, Shelbit Exchange and Aban Tether, together with their operator Siavash Kayvanpour and a network of four affiliated front companies spanning Georgia, Poland and the UAE. The allegation: helping Iran's Islamic Revolutionary Guard Corps (IRGC) move money through the crypto system.

It is the latest in a steady drumbeat of enforcement action, following the June 2026 designation of Iran's largest domestic exchanges, Nobitex, Wallex, Bitpin and Ramzinex. Treasury Secretary Scott Bessent was characteristically blunt about the direction of travel, saying the designation showed that "the Iranian regime's reliance on digital assets and shadow banking networks is further evidence that Economic Fury is working", and adding that "whether in dollars, rials, or crypto, Treasury will hunt down and dismantle the illicit financial networks that keep the regime afloat". The message is simple: regulators are treating crypto rails as just another financial system to police, not a lawless frontier beyond their reach.

So what actually happened? OFAC says wallets linked to the IRGC sent over USD 1 million in crypto to Shelbit, and Shelbit sent more than USD 2 million back. Kayvanpour is also alleged to have sent over USD 2 million of his own to Nobitex, an exchange the U.S. had already sanctioned. Shelbit was registered in Georgia but ran commercially out of Dubai as Shelbit General Trading LLC, and was designated for materially supporting the IRGC. It was also reportedly tied to a Persian-language online gambling network run by Iranian influencers, said to have laundered tens of millions of dollars through the platform, even though the network's operators were convicted of illegal gambling in Iran back in 2023. Aban Tether, a separate Iran-based exchange, was designated for processing transactions on behalf of several other Iranian exchanges that were already under sanctions.