驱动开发：内核判断驱动加载状态

本篇文章将重点讨论内核模块开发中的一些关键技术。我们将介绍如何判断驱动的加载状态，获取ntoskrnl模块基址以及应用层模块基址。我们还将探讨如何通过PEB获取进程参数，以及一些高级技术，如断链隐藏进程技术，特征码搜索定位技术，LDE引擎计算汇编长度，InlineHook挂钩与摘除钩子技术，以及取模块函数地址技术。

在驱动开发中我们有时需要得到驱动自身是否被加载成功的状态，这个功能看似没啥用实际上在某些特殊场景中还是需要的，如下代码实现了判断当前驱动是否加载成功，如果加载成功, 则输出该驱动的详细路径信息。

该功能实现的核心函数是NtQuerySystemInformation这是一个微软未公开的函数，也没有文档化，不过我们仍然可以通过动态指针的方式调用到它，该函数可以查询到很多系统信息状态，首先需要定义一个指针。

typedef NTSTATUS(*NTQUERYSYSTEMINFORMATION)(
IN ULONG SystemInformationClass,
OUT PVOID   SystemInformation,
IN ULONG_PTR    SystemInformationLength,
OUT PULONG_PTR  ReturnLength OPTIONAL);

其次还需要一个SYSTEM_MODULE_INFORMATION该结构内可以得到模块入口信息模块名称等，调用NtQuerySystemInformation数据会被格式化为SYSTEM_MODULE_INFORMATION方便调用。

typedef struct _SYSTEM_MODULE_INFORMATION {
	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;

最后是SYSTEM_INFORMATION_CLASS该结构同样是一个未文档化的结构体，本此代码中需要用到的枚举类型是SystemModuleInformation其他类型也放这里后期做参考用。

typedef enum _SYSTEM_INFORMATION_CLASS
{
	SystemBasicInformation = 0x0,
	SystemProcessorInformation = 0x1,
	SystemPerformanceInformation = 0x2,
	SystemTimeOfDayInformation = 0x3,
	SystemPathInformation = 0x4,
	SystemProcessInformation = 0x5,
	SystemCallCountInformation = 0x6,
	SystemDeviceInformation = 0x7,
	SystemProcessorPerformanceInformation = 0x8,
	SystemFlagsInformation = 0x9,
	SystemCallTimeInformation = 0xa,
	SystemModuleInformation = 0xb,
	SystemLocksInformation = 0xc,
	SystemStackTraceInformation = 0xd,
	SystemPagedPoolInformation = 0xe,
	SystemNonPagedPoolInformation = 0xf,
	SystemHandleInformation = 0x10,
	SystemObjectInformation = 0x11,
	SystemPageFileInformation = 0x12,
	SystemVdmInstemulInformation = 0x13,
	SystemVdmBopInformation = 0x14,
	SystemFileCacheInformation = 0x15,
	SystemPoolTagInformation = 0x16,
	SystemInterruptInformation = 0x17,
	SystemDpcBehaviorInformation = 0x18,
	SystemFullMemoryInformation = 0x19,
	SystemLoadGdiDriverInformation = 0x1a,
	SystemUnloadGdiDriverInformation = 0x1b,
	SystemTimeAdjustmentInformation = 0x1c,
	SystemSummaryMemoryInformation = 0x1d,
	SystemMirrorMemoryInformation = 0x1e,
	SystemPerformanceTraceInformation = 0x1f,
	SystemObsolete0 = 0x20,
	SystemExceptionInformation = 0x21,
	SystemCrashDumpStateInformation = 0x22,
	SystemKernelDebuggerInformation = 0x23,
	SystemContextSwitchInformation = 0x24,
	SystemRegistryQuotaInformation = 0x25,
	SystemExtendServiceTableInformation = 0x26,
	SystemPrioritySeperation = 0x27,
	SystemVerifierAddDriverInformation = 0x28,
	SystemVerifierRemoveDriverInformation = 0x29,
	SystemProcessorIdleInformation = 0x2a,
	SystemLegacyDriverInformation = 0x2b,
	SystemCurrentTimeZoneInformation = 0x2c,
	SystemLookasideInformation = 0x2d,
	SystemTimeSlipNotification = 0x2e,
	SystemSessionCreate = 0x2f,
	SystemSessionDetach = 0x30,
	SystemSessionInformation = 0x31,
	SystemRangeStartInformation = 0x32,
	SystemVerifierInformation = 0x33,
	SystemVerifierThunkExtend = 0x34,
	SystemSessionProcessInformation = 0x35,
	SystemLoadGdiDriverInSystemSpace = 0x36,
	SystemNumaProcessorMap = 0x37,
	SystemPrefetcherInformation = 0x38,
	SystemExtendedProcessInformation = 0x39,
	SystemRecommendedSharedDataAlignment = 0x3a,
	SystemComPlusPackage = 0x3b,
	SystemNumaAvailableMemory = 0x3c,
	SystemProcessorPowerInformation = 0x3d,
	SystemEmulationBasicInformation = 0x3e,
	SystemEmulationProcessorInformation = 0x3f,
	SystemExtendedHandleInformation = 0x40,
	SystemLostDelayedWriteInformation = 0x41,
	SystemBigPoolInformation = 0x42,
	SystemSessionPoolTagInformation = 0x43,
	SystemSessionMappedViewInformation = 0x44,
	SystemHotpatchInformation = 0x45,
	SystemObjectSecurityMode = 0x46,
	SystemWatchdogTimerHandler = 0x47,
	SystemWatchdogTimerInformation = 0x48,
	SystemLogicalProcessorInformation = 0x49,
	SystemWow64SharedInformationObsolete = 0x4a,
	SystemRegisterFirmwareTableInformationHandler = 0x4b,
	SystemFirmwareTableInformation = 0x4c,
	SystemModuleInformationEx = 0x4d,
	SystemVerifierTriageInformation = 0x4e,
	SystemSuperfetchInformation = 0x4f,
	SystemMemoryListInformation = 0x50,
	SystemFileCacheInformationEx = 0x51,
	SystemThreadPriorityClientIdInformation = 0x52,
	SystemProcessorIdleCycleTimeInformation = 0x53,
	SystemVerifierCancellationInformation = 0x54,
	SystemProcessorPowerInformationEx = 0x55,
	SystemRefTraceInformation = 0x56,
	SystemSpecialPoolInformation = 0x57,
	SystemProcessIdInformation = 0x58,
	SystemErrorPortInformation = 0x59,
	SystemBootEnvironmentInformation = 0x5a,
	SystemHypervisorInformation = 0x5b,
	SystemVerifierInformationEx = 0x5c,
	SystemTimeZoneInformation = 0x5d,
	SystemImageFileExecutionOptionsInformation = 0x5e,
	SystemCoverageInformation = 0x5f,
	SystemPrefetchPatchInformation = 0x60,
	SystemVerifierFaultsInformation = 0x61,
	SystemSystemPartitionInformation = 0x62,
	SystemSystemDiskInformation = 0x63,
	SystemProcessorPerformanceDistribution = 0x64,
	SystemNumaProximityNodeInformation = 0x65,
	SystemDynamicTimeZoneInformation = 0x66,
	SystemCodeIntegrityInformation = 0x67,
	SystemProcessorMicrocodeUpdateInformation = 0x68,
	SystemProcessorBrandString = 0x69,
	SystemVirtualAddressInformation = 0x6a,
	SystemLogicalProcessorAndGroupInformation = 0x6b,
	SystemProcessorCycleTimeInformation = 0x6c,
	SystemStoreInformation = 0x6d,
	SystemRegistryAppendString = 0x6e,
	SystemAitSamplingValue = 0x6f,
	SystemVhdBootInformation = 0x70,
	SystemCpuQuotaInformation = 0x71,
	SystemNativeBasicInformation = 0x72,
	SystemErrorPortTimeouts = 0x73,
	SystemLowPriorityIoInformation = 0x74,
	SystemBootEntropyInformation = 0x75,
	SystemVerifierCountersInformation = 0x76,
	SystemPagedPoolInformationEx = 0x77,
	SystemSystemPtesInformationEx = 0x78,
	SystemNodeDistanceInformation = 0x79,
	SystemAcpiAuditInformation = 0x7a,
	SystemBasicPerformanceInformation = 0x7b,
	SystemQueryPerformanceCounterInformation = 0x7c,
	SystemSessionBigPoolInformation = 0x7d,
	SystemBootGraphicsInformation = 0x7e,
	SystemScrubPhysicalMemoryInformation = 0x7f,
	SystemBadPageInformation = 0x80,
	SystemProcessorProfileControlArea = 0x81,
	SystemCombinePhysicalMemoryInformation = 0x82,
	SystemEntropyInterruptTimingInformation = 0x83,
	SystemConsoleInformation = 0x84,
	SystemPlatformBinaryInformation = 0x85,
	SystemThrottleNotificationInformation = 0x86,
	SystemHypervisorProcessorCountInformation = 0x87,
	SystemDeviceDataInformation = 0x88,
	SystemDeviceDataEnumerationInformation = 0x89,
	SystemMemoryTopologyInformation = 0x8a,
	SystemMemoryChannelInformation = 0x8b,
	SystemBootLogoInformation = 0x8c,
	SystemProcessorPerformanceInformationEx = 0x8d,
	SystemSpare0 = 0x8e,
	SystemSecureBootPolicyInformation = 0x8f,
	SystemPageFileInformationEx = 0x90,
	SystemSecureBootInformation = 0x91,
	SystemEntropyInterruptTimingRawInformation = 0x92,
	SystemPortableWorkspaceEfiLauncherInformation = 0x93,
	SystemFullProcessInformation = 0x94,
	SystemKernelDebuggerInformationEx = 0x95,
	SystemBootMetadataInformation = 0x96,
	SystemSoftRebootInformation = 0x97,
	SystemElamCertificateInformation = 0x98,
	SystemOfflineDumpConfigInformation = 0x99,
	SystemProcessorFeaturesInformation = 0x9a,
	SystemRegistryReconciliationInformation = 0x9b,
	MaxSystemInfoClass = 0x9c,
} SYSTEM_INFORMATION_CLASS;

最后的JudgeLoadDriver()是用于判断驱动是否加载的核心函数，我们看下该函数具体是如何实现的，原理很简单，下面是对代码的详细解释：

• 1.首先定义了一个函数指针NTQUERYSYSTEMINFORMATION m_NtQuerySystemInformation，并初始化一个UNICODE_STRING类型的变量NtQuerySystemInformation_Name，用于存放要获取的函数名NtQuerySystemInformation。
• 2.调用MmGetSystemRoutineAddress函数获取NtQuerySystemInformation函数的地址，并将其赋值给m_NtQuerySystemInformation函数指针。如果获取失败，则返回1。
• 3.调用m_NtQuerySystemInformation函数，并传入SystemModuleInformation作为参数，获取系统中所有模块的信息。如果获取失败，则返回1。
• 4.分配内存，并将获取到的模块信息复制到分配的内存中。如果内存分配失败，则返回1。
• 5.解析获取到的模块信息，检查是否有名为JudgeLoadDriver的模块被加载。如果有，则打印该模块的名称，并返回2。如果没有，则继续检查下一个模块。
• 6.最后释放分配的内存，并返回0表示成功执行。

#include <ntifs.h>
#include <windef.h>
#include <stdlib.h>

typedef NTSTATUS(*NTQUERYSYSTEMINFORMATION)(
IN ULONG SystemInformationClass,
OUT PVOID   SystemInformation,
IN ULONG_PTR    SystemInformationLength,
OUT PULONG_PTR  ReturnLength OPTIONAL);

typedef struct _SYSTEM_MODULE_INFORMATION {
	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 enum _SYSTEM_INFORMATION_CLASS
{
	SystemBasicInformation = 0x0,
	SystemProcessorInformation = 0x1,
	SystemPerformanceInformation = 0x2,
	SystemTimeOfDayInformation = 0x3,
	SystemPathInformation = 0x4,
	SystemProcessInformation = 0x5,
	SystemCallCountInformation = 0x6,
	SystemDeviceInformation = 0x7,
	SystemProcessorPerformanceInformation = 0x8,
	SystemFlagsInformation = 0x9,
	SystemCallTimeInformation = 0xa,
	SystemModuleInformation = 0xb,
	SystemLocksInformation = 0xc,
} SYSTEM_INFORMATION_CLASS;

// 判断当前Driver是否加载成功
ULONG JudgeLoadDriver()
{
	NTQUERYSYSTEMINFORMATION m_NtQuerySystemInformation = NULL;
	UNICODE_STRING NtQuerySystemInformation_Name;
	PSYSTEM_MODULE_INFORMATION ModuleEntry;
	ULONG_PTR RetLength, BaseAddr, EndAddr;
	ULONG ModuleNumbers, Index;
	NTSTATUS Status;
	PVOID Buffer;
	RtlInitUnicodeString(&NtQuerySystemInformation_Name, L"NtQuerySystemInformation");
	m_NtQuerySystemInformation = (NTQUERYSYSTEMINFORMATION)MmGetSystemRoutineAddress(&NtQuerySystemInformation_Name);
	if (m_NtQuerySystemInformation == NULL)
	{
		DbgPrint("获取NtQuerySystemInformation函数失败！\n");
		return 1;
	}

	RetLength = 0;
	Status = m_NtQuerySystemInformation(SystemModuleInformation, NULL, 0, &RetLength);
	if (Status < 0 && Status != STATUS_INFO_LENGTH_MISMATCH)
	{
		DbgPrint("NtQuerySystemInformation调用失败！错误码是：%x\n", Status);
		return 1;
	}

	Buffer = ExAllocatePoolWithTag(NonPagedPool, RetLength, 'lysh');
	if (Buffer == NULL)
	{
		DbgPrint("分配内存失败！\n");
		return 1;
	}

	Status = m_NtQuerySystemInformation(SystemModuleInformation, Buffer, RetLength, &RetLength);
	if (Status < 0)
	{
		DbgPrint("NtQuerySystemInformation调用失败 %x\n", Status);
		return 1;
	}

	ModuleNumbers = *(ULONG*)Buffer;
	ModuleEntry = (PSYSTEM_MODULE_INFORMATION)((ULONG_PTR)Buffer + 8);
	for (Index = 0; Index < ModuleNumbers; ++Index)
	{
		BaseAddr = (ULONG_PTR)ModuleEntry->Base;
		EndAddr = BaseAddr + ModuleEntry->Size;
		if (BaseAddr <= (ULONG_PTR)JudgeLoadDriver && (ULONG_PTR)JudgeLoadDriver <= EndAddr)
		{
			DbgPrint("模块名称是：%s\n", ModuleEntry->ImageName);
			return 2;
		}
		++ModuleEntry;
	}

	return 0;
}

VOID UnDriver(PDRIVER_OBJECT driver)
{
	DbgPrint("驱动卸载成功 \n");
}

NTSTATUS DriverEntry(IN PDRIVER_OBJECT Driver, PUNICODE_STRING RegistryPath)
{
	DbgPrint("hello lyshark.com \n");

	ULONG ul = JudgeLoadDriver();

	DbgPrint("驱动状态: %d \n", ul);

	Driver->DriverUnload = UnDriver;
	return STATUS_SUCCESS;
}

代码运行效果如下所示：