![]() ![]() ![]() While Microsoft had released patches previously to close the exploit, much of WannaCry's spread was from organizations that had not applied these, or were using older Windows systems that were past their end-of-life. EternalBlue was stolen and leaked by a group called The Shadow Brokers at least a year prior to the attack. It propagated through EternalBlue, an exploit developed by the United States National Security Agency (NSA) for older Windows systems. ![]() The WannaCry ransomware attack was a worldwide cyberattack in May 2017 by the WannaCry ransomware cryptoworm, which targeted computers running the Microsoft Windows operating system by encrypting data and demanding ransom payments in the Bitcoin cryptocurrency.
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