http://www.kernelmode.info/forum/viewtopic.php?f=11&p=27460#p27460
https://github.com/hfiref0x/VBoxHardenedLoader
http://www.kernelmode.info/forum/viewtopic.php?f=11&t=3478
“VirtualBox Hardened VM detection mitigation loader: VBoxAntiVMDetectHardened is a complex of methods implemented to reduce VM detection possibilities of the common malware.”
Interesting, there are UEFI patches for this, as well!