Two hacker groups associated with North Korea, the Lazarus Group and APT38, were responsible for the theft last June of $100 million from U.S. crypto firm Harmony’s Horizon bridge, the Federal Bureau of Investigation (FBI) said on Monday.
On January 13, the groups used a privacy protocol called Railgun to launder over $60 million worth of ethereum stolen during the theft in June, the FBI said in a statement
A portion of the stolen ethereum was subsequently sent to several virtual asset providers and converted to bitcoin, the FBI said.
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The FBI said North Korea’s theft and laundering of virtual currency is used to support its ballistic missile and Weapons of Mass Destruction programs.
In June last year, California-based Harmony said that a heist had hit its Horizon bridge, which was the underlying software used by digital tokens such as bitcoin and ether for transferring crypto between different blockchains.
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Reuters in June reported that North Korean hackers were most likely behind the attack on Harmony, citing three digital investigative firms.
Harmony develops blockchains for decentralized finance – peer-to-peer sites that offer loans and other services without traditional gatekeepers such as banks – and non-fungible tokens.