The Federal Bureau of Investigation revealed that a hack of a crypto-product last year which netted $100 million was performed by North Korean-linked actors.

The FBI said after it investigation it was “able  to confirm” that the hack, on the Horizon bridge, was performed by Lazarus Group, which is also known as APT38, an operation linked to Pyongyang.

The purpose of the bridge was to swap cryptocurrencies between separate blockchain networks.

The FBI also noted that this month the group laundered over $60 million of the stolen ether tokens from the June 2022 theft using the Railgun system. Railgun is a system designed to allow people to move cryptocurrency while maintaining their anonymity.

The FBI said the laundered funds were sent to a number of virtual asset service providers and converted into Bitcoin.

When the attack occurred, the blockchain analytics company Elliptic had reported that there were “strong indicators” the perpetrators were with Lazarus. The hackers had almost immediately begun moving the funds in such a way as to hide their identities.

The FBI added, it continues “to identify and disrupt North Korea’s theft and laundering of virtual currency, which is used to support North Korea’s ballistic missile and Weapons of Mass Destruction programs.” 

Several crypto-hacks have been traced back to North Korean-linked hackers.

Lazarus in particular was linked to a $600 million theft from the Ronin network by the US Treasury. The Ronin Network was a “side-chain” for the crypto-game Axie Infinity