编写驱动检测虚拟机
通过CPUID原理:通过检查功能号1的CPUID返回的ecx的最高位是否为1，如果为1，则在虚拟环境下运行。真机的最高位不为1.[*]检测处理器是否支持 cpuid 指令（忽略这一条）
现在的CPU都支持 cpuid 指令，没必要去检测是否支持，除非在很早的的机器上运行才有必要(那好像也要80486的机器吧)。
在 eflags.ID 标志位是 Processor Feature Identification 位，即最高位，通过修改这个标志位的值，以此来检测是否支持 cpuid 指令。
[*]要使用CPUID指令，输入eax表示功能号（类似中断的用法）
输出eax,ebx,ecx,edx
在EDX和ECX中返回的功能标志表明着该CPU都支持那些功能
ECX返回值定义如下（资料来自Intel）：
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bit Name Description
---------------------------------------------------------
00 SSE3 Streaming SIMD Extensions 3
01 Reserved
02 DTES64 64-Bit Debug Store
03 MONITORMONITOR/MWAIT
04 DS-CPL CPL Qualified Debug Store
05 VMX Virtual Machine Extensions
06 SMX Safer Mode Extensions
07 EST Enhanced Intel SpeedStep® Technology
08 TM2 Thermal Monitor 2
09 SSSE3 Supplemental Streaming SIMD Extensions 3
10 CNXT-IDL1 Context ID
12:11 Reserved
13 CX16 CMPXCHG16B
14 xTPR xTPR Update Control
15 PDCM Perfmon and Debug Capability
17:16 Reserved
18 DCA Direct Cache Access
19 SSE4.1 Streaming SIMD Extensions 4.1
20 SSE4.2 Streaming SIMD Extensions 4.2
21 x2APIC Extended xAPIC Support
22 MOVBE MOVBE Instruction
23 POPCNT POPCNT Instruction
25:24 Reserved
26 XSAVE XSAVE/XSTOR States
27 OSXSAVE
31:28 Reserved
下面是使用CPUID检测的核心汇编代码
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.CODE
getcpuid PROC
xor eax,eax
mov eax,1h
cpuid
mov a,eax
mov b,ebx
mov c_var,ecx
mov d,edx
ret
getcpuid ENDP
END
通过利用IoInitializeTimer配合IoStartTimer的定时器来循环判定。
遍历模块我们说到的第一种CPUID的方法可能通过修改VMX的配置等方法绕过。
还有一种方式是遍历当前系统中所有的sys。我们要查找的是vmmouse.sys,vmrawdsk.sys,vmusbmouse.sys中的任意一个。
核心是利用NtQuerySystemInformation
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#include <ntddk.h>
#include <windef.h>
typedef struct _SYSTEM_MODULE_INFORMATION_ENTRY
{
HANDLE Section;
PVOID MappedBase;
PVOID Base;
ULONG Size;
ULONG Flags;
USHORT LoadOrderIndex;
USHORT InitOrderIndex;
USHORT LoadCount;
USHORT PathLength;
CHAR ImageName[256];
} SYSTEM_MODULE_INFORMATION, *PSYSTEM_MODULE_INFORMATION;
typedef NTSTATUS(*NTQUERYSYSTEMINFORMATION) (
IN ULONG SystemInformationClass,
OUT PVOID SystemInformation,
IN ULONG_PTR SystemInformationLength,
OUT PULONG_PTR ReturnLength OPTIONAL
);
VOID getcpuid();
BOOLEAN CheckDriverModule();
UNICODE_STRING symLinkName = { 0 };
PDEVICE_OBJECT pDevice;
PETHREAD pThreadObject = NULL;
BOOLEAN boom = FALSE;
//eax为CPU型号
//若为虚拟机，则ecx最高位为1;如果是物理机，则最高位为0.
//code in cpuid.asm
DWORD a = 0, b = 0, c_var = 0, d = 0;
VOID Unload() {//PDRIVER_OBJECT DriverObject
if (pThreadObject) {
boom = TRUE;
KeWaitForSingleObject(pThreadObject, Executive, KernelMode, FALSE, NULL);
}
if (pDevice) {
IoStopTimer(pDevice);
IoDeleteSymbolicLink(&symLinkName);
IoDeleteDevice(pDevice);
pDevice = NULL;
}
DbgPrint("Unload --------");
}
VOID TimerRoutine(PDEVICE_OBJECT DeviceObject, PVOID context) {
DbgPrint("In TimerRoutine\n");
//Begin normal check
getcpuid();
c_var = c_var >> 31;
if (c_var){
DbgPrint("Running in the virtual machine 2. Find VMWare by CPUID!!!!\n");
}
}
BOOLEAN CheckDriverModule() {
BOOLEAN bRet = FALSE;
NTQUERYSYSTEMINFORMATION m_NtQuerySystemInformation = NULL;
UNICODE_STRING NtQuerySystemInformation_Name = { 0 };
PSYSTEM_MODULE_INFORMATION ModuleEntry = NULL;
ULONG_PTR RetLength = 0, BaseAddr = 0, EndAddr = 0;
ULONG ModuleNums = 0, Index = 0;
NTSTATUS status = STATUS_SUCCESS;
PVOID Buffer = NULL;
RtlInitUnicodeString(&NtQuerySystemInformation_Name, L"NtQuerySystemInformation");
do
{
m_NtQuerySystemInformation = (NTQUERYSYSTEMINFORMATION)MmGetSystemRoutineAddress(&NtQuerySystemInformation_Name);
if (m_NtQuerySystemInformation == NULL) {
bRet = TRUE;
break;
}
status = m_NtQuerySystemInformation(0xb, NULL, 0, &RetLength);
if (status < 0 && status != STATUS_INFO_LENGTH_MISMATCH) {
bRet = TRUE;
break;
}
Buffer = ExAllocatePoolWithTag(PagedPool, RetLength, "ytz");
if (Buffer == NULL) {
bRet = TRUE;
break;
}
RtlZeroMemory(Buffer, RetLength);
status = m_NtQuerySystemInformation(0xb, Buffer, RetLength, &RetLength);
if (status < 0) {
bRet = TRUE;
break;
}
ModuleNums = *(ULONG*)Buffer;
ModuleEntry = (PSYSTEM_MODULE_INFORMATION)((ULONG_PTR)Buffer + 8);
for (Index = 0; Index < ModuleNums; Index++) {
if (strstr(ModuleEntry->ImageName, "vmmouse.sys") ||
strstr(ModuleEntry->ImageName, "vmrawdsk.sys") ||
strstr(ModuleEntry->ImageName, "vmusbmouse.sys")) {
DbgPrint("The Module Name is %s\n", ModuleEntry->ImageName);
bRet = TRUE;
break;
}
ModuleEntry++;
}
break; //Amuse
} while (TRUE);
if (Buffer)
{
ExFreePool(Buffer);
Buffer = NULL;
}
return bRet;
}
VOID CheckVmWare(PVOID context) {
LARGE_INTEGER sleeptime = { 0 };
sleeptime.QuadPart = -20000000;
while (1)
{
if (boom)
break;
if (CheckDriverModule()) {
DbgPrint("Running in the virtual machine 1. Find VMWare!!!!\n");
}
DbgPrint("Thread is working");
KeDelayExecutionThread(KernelMode, 0, &sleeptime);
}
PsTerminateSystemThread(STATUS_SUCCESS);
}
NTSTATUS DriverEntry(PDRIVER_OBJECT driverObject, PUNICODE_STRING RegPath) {
HANDLE hThread = NULL;
NTSTATUS status = NULL;
UNICODE_STRING DeviceName = { 0 };
driverObject->DriverUnload = Unload;
status = PsCreateSystemThread(&hThread, 0, NULL, NULL, NULL, CheckVmWare, NULL);
if (!NT_SUCCESS(status)) {
DbgPrint("Create Thread Failed!\n");
return STATUS_UNSUCCESSFUL;
}
status = ObReferenceObjectByHandle(hThread, THREAD_ALL_ACCESS, *PsThreadType, KernelMode, &pThreadObject, NULL);
if (!NT_SUCCESS(status))
{
DbgPrint("Cannot reference");
ObDereferenceObject(pThreadObject);
}
RtlInitUnicodeString(&DeviceName, L"\\Device\\MyDevices");
status = IoCreateDevice(driverObject, 0, &DeviceName, FILE_DEVICE_UNKNOWN, 0, TRUE, &pDevice);
if (!NT_SUCCESS(status)) {
DbgPrint("Create Device Failed!");
return STATUS_UNSUCCESSFUL;
}
RtlInitUnicodeString(&symLinkName, "\\?\\SybLinkName");
status = IoCreateSymbolicLink(&symLinkName, &DeviceName);
if (!NT_SUCCESS(status)) {
DbgPrint("Create SymLink Failed!");
//return STATUS_UNSUCCESSFUL;
}
IoInitializeTimer(pDevice, (PIO_TIMER_ROUTINE)TimerRoutine, NULL);
IoStartTimer(pDevice);
ZwClose(hThread);
return STATUS_SUCCESS;
}
注：在X64下使用上文的汇编代码时，需要修改下asm的属性
效果
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