According to CoinMeta, the United States Federal Bureau of Investigation (FBI) accuses North Korea of being responsible for a cyberattack on Thursday that amounted to approximately $630 million. In a press release, the FBI stated that this specific malicious North Korean cyberactivity was dubbed "Operation Grumpy Bear," and it was recently observed that the stolen assets were mainly converted into Ethereum. The FBI called on private sector entities, including node operators and blockchain analysis companies, to stop transactions with these addresses in order to prevent further money laundering activities.