Pass-the-hash (PtH) attacks are among the most feared cyber attacks in the computer world. Microsoft Windows has certainly been the primary target thanks to its pervasiveness in the corporate environment. Windows 8.1 includes comprehensive security mitigations against such attacks. It’s very difficult for any OS to stop PtH attacks while maintaining SSO (single-sign-on) functionality customers absolutely require. Asking users to re-enter their logons every time they want to connect to new application, service, or drive share is the quickest way to make your OS obsolete.”]
Source: https://www.csoonline.com/article/2612325/windows-8-1-stops-pass-the-hash-attacks.html