The U.S. Treasury Department stated that the A7 Network was used by the Iranian regime, the Islamic Revolutionary Guard Corps, and proxy groups like Hamas to evade international sanctions

From the articleUS sanctions A7 network for allegedly aiding Iran's sanctions evasionAlso in US targets Russian payments network A7 for helping Iran evade sanctions - Cryptopolitan, US Designates Russia's A7 Network as Transnational Criminal Organization - Decrypt, A7 denies Iran links after US Treasury sanctions the Russian payments network