Hello @Vladimír Čamaj ,
Best approach is to have the Keys Ready (Private and Public).
Use PuttyGen (https://www.chiark.greenend.org.uk/~sgtatham/putty/latest.html) to create a key pair.
Public Key can be used while creating the VM and Private key to be loaded in MoboXTerm.
Please mark as "Accept the answer" if the above steps helps you. Others with similar issues can also follow the solution as per your suggestion
Regards,
Manu