Detect VirtualBox (Cadmus Mac Address TRICK)

//http://waleedassar.blogspot.com (@waleedassar)
//VirtualBox Adapters (Host and Guests) always have their MAC addresses in the form of 08-00-27-??-??-??. This range was originally assigned to Cadmus Computer Systems.
//This might show false positive results, but has not been witnessed so far.
#include "stdafx.h"
#include "winsock2.h"
#include "iphlpapi.h"
#include "ws2tcpip.h"
#include "windows.h"
#include "stdio.h"


int main(int argc, char* argv[])
{
    WSADATA WSD;
    if(!WSAStartup(MAKEWORD(2,2),&WSD))
    {
        unsigned long tot_size=0;
        int ret=GetAdaptersAddresses(AF_UNSPEC,GAA_FLAG_INCLUDE_PREFIX,0,0,&tot_size);
        if(ret==ERROR_BUFFER_OVERFLOW)
        {
            IP_ADAPTER_ADDRESSES* px=(IP_ADAPTER_ADDRESSES*)LocalAlloc(LMEM_ZEROINIT,tot_size);
            if(px)
            {
                ret=GetAdaptersAddresses(AF_UNSPEC,GAA_FLAG_INCLUDE_PREFIX,0,px,&tot_size);
                IP_ADAPTER_ADDRESSES* pxx=px;
                //Traverse a singly-linked list
                for(pxx;pxx;pxx=pxx->Next)
                {
                    if(pxx->PhysicalAddressLength==0x6)
                    {
                        if(wcsicmp(pxx->FriendlyName,L"VirtualBox Host-Only Network"))  //We don't want to detect the HOST OS
                        {
                            char xx[0x6]={0};
                            memcpy(xx,pxx->PhysicalAddress,0x6);
                            if(xx[0]==0x08&& xx[1]==0x00 && xx[2]==0x27) //Cadmus Computer Systems Mac address
                            {
                                MessageBox(0,L"VirtualBox detected",L"waliedassar",0);
                            }
                        }
                    }
                }
                LocalFree(px);
            }
        }
        WSACleanup();
    }
    ExitProcess(0);
    return 0;
}