Sandworm: A New Era of Cyberwar and the Hunt for the Kremlin's Most Dangerous Hackers

by Andy Greenberg

It was a perfect, sunny summer afternoon in Copenhagen when the world’s largest shipping conglomerate began to lose its mind.

In the coming months, the Shadow Brokers’ data dumps would prove to be vastly more damaging than anything Snowden had revealed—not just to U.S. intelligence agencies, but to the world.

“The message was, ‘This is not a guess,’ ” he said. “ ‘We know.’

To get a sense of what that $10 billion in damages means on the spectrum of cyberattacks, consider that when a nightmarish but more typical ransomware attack paralyzed the city government of Atlanta in March 2018, it cost an estimated $17 million.