But what about other OS systems e.g. Linux, MAC OS. Can they be attacked using pass-the-hash attack? I know that there are no tools (that am aware off) to do such attacks against systems such as Linux, yet. But at least in theory any system that uses single-signOn can be attacked via pass-the-hash attack.
So is it safe and correct to say that pass-the-hash is possible/impossible in an environment where Linux/OS X is the only OS used?