The Incredible Rise of North Korea’s Hacking Army

The country’s cyber forces have raked in billions of dollars for the regime by pulling off schemes ranging from A.T.M. heists to cryptocurrency thefts. Can they be stopped?

Shimomura was a member of the Yamaguchi-gumi, the largest yakuzacrime family in Japan. When one of his superiors asked him if he wanted to make a pile of fast money, he naturally said yes. It was May 14, 2016, and Shimomura was living in the city of Nagoya. Thirty-two years old and skinny, with expressive eyes, he took pride in his appearance, often wearing a suit and mirror-shined loafers. But he was a minor figure in the organization: a collector of debts, a performer of odd jobs.

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