South Korea says presumed North Korean hackers breached personal emails of presidential staffer

We detected the case in advance of (Yoon's) visit and took necessary measures, Yoon's office said in a statement to reporters.

North Korea runs a huge, government-backed hacking program that has been accused of stealing large sums of money, often in cryptocurrency, to finance its illicit nuclear weapons and missile program in defiance of U.S.-led international sanctions.

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