Apple announced on Monday that Tim Cook, who has served as Apple’s CEO since 2011, will step down. Cook was the direct successor as Apple CEO after Steve Jobs, who resigned due to health issues.

Cook will remain in his role until September 1 of this year, when Senior Vice President of Hardware Engineering John Ternus will take over as CEO. Cook will then transition to a new role as Apple Executive Chairman.

“John Ternus has the mind of an engineer, the soul of an innovator, and the heart to lead with integrity and with honor,” Cook said in a statement. “He is a visionary whose contributions to Apple over 25 years are already too numerous to count, and he is without question the right person to lead Apple into the future. I could not be more confident in his abilities and his character, and I look forward to working closely with him on this transition and in my new role as executive chairman.”

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Over the weekend, hackers stole more than $290 million in cryptocurrency from Kelp DAO, a protocol that allows users to earn yields on idle crypto investments. 

By Monday, LayerZero, one of the projects affected by the hack, accused North Korea of carrying out the heist. The hack is now the largest crypto theft of the year so far, following an earlier hack at crypto exchange Drift in April netted hackers around $285 million.

Per its post on X, LayerZero said the hackers exploited Kelp DAO via its LayerZero bridge, which allows different blockchains to send instructions to each other. The hackers then took advantage of Kelp’s own security configuration, which did not require multiple verifications before approving transactions. That allowed the hackers to siphon off the funds with fraudulent transactions.

The company cited “preliminary indicators” that point to North Korea as the culprit, in particular its hacking group that targets crypto known as TraderTraitor. 

Kelp DAO responded to LayerZero blaming it for the theft instead. 

In the last few years, North Korean hackers working for Kim Jong Un’s regime have become highly successful at stealing crypto. Last year, North Korean hackers stole more than $2 billion in crypto. Overall, since 2017, the total amount of stolen crypto by North Korea is said to be around $6 billion.