Are there any hypervisors that cannot be determined from the guest?

Question

Virtualization

Actually, subject. Are there virtual machines, the presence of which is not determined from the guest?

Answer 1

It depends on the "guest". If he wants to determine this, then the hypervisor provides him with such opportunities and means. If he doesn't want to, then he doesn't.
The question is not clear.

Answer 2

There are none, only the required level of effort to achieve the result differs. At one time, the famous BluePill was generally determined at the time when they figured it out .

Answer 3

If the angelic language doesn't bother you, read this grimoire :-)
handlers.sans.org/tliston/ThwartingVMDetection_Liston_Skoudis.pdf
In general, the notorious MAVM is actually not easy to detect. It's possible , of course, but not easy.
PS: Bochs is also good by the way, I agree with g0dlike

Answer 4

Comrades! I could not pass by without adding my 5 cents.
What about the xen hypervisor? Recently, the question of raising windows in a virtual machine also arose. After much trial and error, I settled on it. After all, he (is it the only one -?) Can delegate devices to virtual machines (a video card - one, certain ports - another).
*nix systems run in paravirtualization (pv) mode, while closed source windows and others run in partial virtualization (hvm) mode. In any case, 2003 has been spinning without problems for a week through a Linux firewall with a separate network and thinks that it is a central