HackTheBox Blue Walkthrough Eternal Blue Exploit MS17-010

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Learn how to complete the HackTheBox Blue challenge, which is machine vulnerable to the EternalBlue SMB vulnerability MS17-010.

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EternalBlue is a cyberattack exploit developed by the U.S. National Security Agency (NSA). It was leaked by the Shadow Brokers hacker group on April 14, 2017, one month after Microsoft released patches for the vulnerability.

On May 12, 2017, the worldwide WannaCry ransomware used this exploit to attack unpatched computers. On June 27, 2017, the exploit was again used to help carry out the 2017 NotPetya cyberattack on more unpatched computers.

EternalBlue exploits a vulnerability in Microsoft's implementation of the Server Message Block (SMB) protocol. This vulnerability is denoted by entry CVE-2017-0144 in the Common Vulnerabilities and Exposures (CVE) catalog. The vulnerability exists because the SMB version 1 (SMBv1) server in various versions of Microsoft Windows mishandles specially crafted packets from remote attackers, allowing them to execute arbitrary code on the target computer.

The exploit was also reported to have been used since March 2016 by the Chinese hacking group Buckeye (APT3), after they likely found and re-purposed the tool, as well as reported to have been used as part of the Retefe banking trojan since at least September 5, 2017.

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