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Topic created on: October 4, 2012 15:38 CDT by spoofy .

Anyone here know of any work dealing with detection of hyper-v virtual machines? Most research I find references VMware and virtualPC

PeterFerrie		October 5, 2012 12:25.04 CDT
check bit 31 of eflags register, it's 1 if Hyper-V is running

pk		October 7, 2012 10:30.16 CDT
check HKLM\System\\CurrentControlSet\services\vmicheartbeat key + "virtual hd" string is used in STORAGE_DEVICE_DESCRIPTOR.Product

spoofy		October 7, 2012 18:45.47 CDT
eflags doesn't work . its the same on both vm and non-vm.

PeterFerrie		October 8, 2012 17:43.12 CDT
yes, I misremembered. :-( it's actually bit 31 of ECX after CPUID.EAX=1

waleedassar		October 8, 2012 18:55.29 CDT
int main(int argc, char* argv[]) { bool x=0; __asm { pushad pushfd pop eax or eax,0x00200000 push eax popfd pushfd pop eax and eax,0x00200000 jz CPUID_NOT_SUPPORTED ;Are you still alive? xor eax,eax xor edx,edx xor ecx,ecx xor ebx,ebx inc eax ;processor info and feature bits cpuid test ecx,0x80000000 ;Hypervisor present jnz Hypervisor mov x,0 jmp bye Hypervisor: mov x,1 jmp bye CPUID_NOT_SUPPORTED: mov x,2 bye: popad } if(x==1) { MessageBox(0,"Hypervisor detected","waliedassar",0); ExitProcess(3); } return 0; } Check these links: http://homepage.ntlworld.com/jonathan.deboynepollard/FGA/detecting-x86-virtual-machines.html http://en.wikipedia.org/wiki/CPUID

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