![]() ![]() I will describe a general workflow for the most common use of password hashes which is account registration on a website or a system: Most systems convert password into a hash format to protect and hide the original password ![]() Password Hash is an encrypted text string generated by a special 1-way encryption function using the clear text password string, for example, MD5, which is easy to perform, but very difficult to reverse. Samba in the other hand, is the UNIX implementation of SMB. Samba is used to provide clients with the ability to access UNIX directories and files via the SMB protocol, the exact same way if they were talking to a Windows server. Samba now runs on multiple platforms and is an essential part of most Linux distributions. Since SMB provides several features such as manipulating files, shares, messaging, IPC and more, it is one of the most attractive services for hackers during enumeration and exploitation phases. Starting from Windows 2000 and higher, SMB can run over TCP/IP using port 445 without the need to run over NetBIOS sessions. Therefore a NetBIOS session was required to establish SMB connection Before Windows 2000, SMB used to run with NetBIOS over TCP/IP port 139. SMB lets you share files, disks, directories, printers, and others. The Server Message Block (SMB) Protocol is a network file sharing protocol, and as implemented in Microsoft Windows is known as Microsoft SMB Protocol. To fully understand the details of SMB relay attack and other attacks in the coming articles, I would like to start with an introduction to some common terms and concepts, such as SMB protocol, hashes and different types of password hashes in Windows and finally Windows authentication protocols NT/NTLM SMB Relay attack takes advantage of a weakness in the authentication protocol (NTLM) to perform a man in the middle between two systems, which allow the adversary to get administrative access to its target.
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