Grinex, a Russian cryptocurrency exchange utilized heavily for sanctions evasion, has suspended operations after losing over 1 billion rubles ($13 million) in what it claims was a massive cyberattack orchestrated by foreign intelligence agencies, The Moscow Times reported on April 16.

“Digital footprints and the nature of the attack indicate an unprecedented level of resources and technologies available exclusively to the structures of unfriendly states. According to preliminary data, the attack was coordinated with the goal of causing direct damage to the financial sovereignty of Russia,” the exchange said in a public statement.