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About EternalBlue
EternalBlue is a computer exploit software developed by the U.S. National Security Agency (NSA). It is based on a zero-day vulnerability in Microsoft Windows software that allowed users to gain access to any number of computers connected to a network. The NSA was aware of this vulnerability but did not disclose it to Microsoft for several years, as it intended to use the exploit as part of its offensive cyber operations. In 2017, the NSA discovered that the software had been stolen by a group of hackers known as the Shadow Brokers. Microsoft might have been informed of this and released security updates in March 2017 patching the vulnerability. While this was happening, the hacker group attempted to auction off the software, but did not succeed in finding a buyer. EternalBlue was then released publicly on April 14, 2017.
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