Each year, thousands of North Korean coders working abroad bring in hundreds of millions of dollars, sending money back to the sanctioned nation. Now, an apparent huge new trove of data sheds new light on how the operation is run.

In May, WIRED published an investigation exploring how these coders have been secretly placed inside Western companies. Read it here:

As for how the scam is run, everything is professionally and meticulously organized. “Everyone has to make their quotas. Everything needs to be jotted down,” says one expert. Read more: