Over the weekend, hackers stole more than $290 million worth of cryptocurrency from Kelp DAO. This platform lets people earn profit on their unused crypto.

By Monday, LayerZero, one of the affected projects, claimed that North Korea was behind the attack. This has become the biggest crypto theft of the year so far. Earlier in April, another hack on the crypto exchange Drift resulted in a loss of about $285 million.

LayerZero shared on X (Twitter) that the hackers targeted Kelp DAO through its LayerZero bridge. This bridge connects different blockchains and allows them to communicate with each other. The attackers also took advantage of a weakness in Kelp DAO’s security system, which did not require multiple approvals before processing transactions. Because of this, the hackers were able to move the money using fake transactions.

LayerZero said there are early signs pointing to North Korea, especially a hacking group known as TraderTraitor, which is known for targeting crypto platforms.

However, Kelp DAO denied this and instead blamed LayerZero for the breach.

In recent years, hackers linked to North Korea have become very active in stealing cryptocurrency. Last year alone, they reportedly stole over $2 billion. Since 2017, the total amount of crypto stolen by North Korean groups is estimated to be around $6 billion.