It was late afternoon on May 12, 2017. Two exhausted security researchers could barely unpack the events of what had just happened. Marcus Hutchins and Jamie Hankins, who were working from their homes in the U.K. for Los Angeles-based cybersecurity company Kryptos Logic, had just stopped a global cyberattack dead in its tracks. Hours earlier, WannaCry ransomware began to spread like wildfire, encrypting systems and crippling businesses and transport hubs across Europe.
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