Hi Dimitris,
In theory, probably yes. It’s a computer running a (heavily optimised) version of Linux on an ARM chip. In practice, you have to know the login details to SSH into the operating system, and Auralic are unlikely to tell you what they are.
Someone with better hacking skills than me may be able to figure out how to get in by analysing the software updates released by Auralic. I started looking at that kind of approach when I was thinking of installing NAA on the Aries.
One thing I would be pretty confident about. If you do get in to the Aries Mini and mess about with the operating system and manage to brick the device (always a risk for inquisitive amateurs such as myself) then you would be on your own warranty wise.