How one guy stopped the WannaCry ransomware in its tracks after it spread to 150 countries

Last Friday, a piece of malware began doing the rounds in the UK, locking PC users out of their data unless they paid up a ransom in Bitcoin. It then spread to Spain and eventually more than 150 countries, affecting not just individuals, but also over 10,000 organizations including the UK’s National Health Service. The ransomware in question, now known as WannaCry, is believed to have used an exploit found in leaked data from the US National Security Agency (NSA) and could have affected far more systems. Thankfully, a 22-year-old security researcher put a stop to that with a $10…

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