驱动中遍历模块,以及获取ntoskrnl.exe基址

方法是基于PsLoadModuleList方式

#驱动中遍历模块

##一丶简介

简介:

进入内核了.遍历内核中使用的模块该怎么办. 其实在驱动中.咱们的DriverEntry入口位置. 提供了两个参数. 一个是DrIverObject另外一个则是注册表路径.

其实遍历模块的技巧就在这个DriverObject中.

众所周知在Ring3下遍历模块能够经过TEB PEB遍历. 咱们会接触一个结构体叫作LDR_DATA_TABLE_ENTRY的结构体. 内核中也会使用这个结构体. 看下DriverObject对象所表明的含义.

typedef struct _DRIVER_OBJECT {
    CSHORT Type;
    CSHORT Size;

    PDEVICE_OBJECT DeviceObject;                //驱动对象
    ULONG Flags;                                //驱动的标志


    PVOID DriverStart;                          //驱动的起始位置
    ULONG DriverSize;                           //驱动的大小
    PVOID DriverSection;                        //指向驱动程序映像的内存区对象
    PDRIVER_EXTENSION DriverExtension;          //驱动的扩展空间

    UNICODE_STRING DriverName;                  //驱动名字

    PUNICODE_STRING HardwareDatabase;


    PFAST_IO_DISPATCH FastIoDispatch;


    PDRIVER_INITIALIZE DriverInit;
    PDRIVER_STARTIO DriverStartIo;
    PDRIVER_UNLOAD DriverUnload;
    PDRIVER_DISPATCH MajorFunction[IRP_MJ_MAXIMUM_FUNCTION + 1];

} DRIVER_OBJECT;
typedef struct _DRIVER_OBJECT *PDRIVER_OBJECT;

在这里主要使用 DriverSection这个成员 这个成员则能够解释为LDR_DATA_TABLE_ENTRY结构体. 里面存放着咱们的全部模块.

typedef struct _LDR_DATA_TABLE_ENTRY {
	LIST_ENTRY InLoadOrderLinks;               //链表存储,指向下一个LDR_DATA_TABLE_ENTRY结构
	LIST_ENTRY InMemoryOrderLinks;
	LIST_ENTRY InInitializationOrderLinks;
	PVOID DllBase;                             //基址
	PVOID EntryPoint;
	ULONG SizeOfImage;
	UNICODE_STRING FullDllName;
	UNICODE_STRING BaseDllName;                //存放着驱动模块名
	ULONG Flags;
	USHORT LoadCount;
	USHORT TlsIndex;
	union {
		LIST_ENTRY HashLinks;
		struct {
			PVOID SectionPointer;
			ULONG CheckSum;
		};
	};
	union {
		struct {
			ULONG TimeDateStamp;
		};
		struct {
			PVOID LoadedImports;
		};
	};
}LDR_DATA_TABLE_ENTRY, *PLDR_DATA_TABLE_ENTRY;

因此代码就很简单了.直接遍历自身结构体的 DriverSection成员便可.解释为(LDR_DATA_TABLE_ENTRY)结构.

##二丶代码以及演示.

#include "Driver.h" //这个替换为本身的. 包含Ntddk.h便可.
#include <wdm.h>

//KLDR_DATA_TABLE_ENTRY

typedef struct _LDR_DATA_TABLE_ENTRY {
	LIST_ENTRY InLoadOrderLinks;
	LIST_ENTRY InMemoryOrderLinks;
	LIST_ENTRY InInitializationOrderLinks;
	PVOID DllBase;
	PVOID EntryPoint;
	ULONG SizeOfImage;
	UNICODE_STRING FullDllName;
	UNICODE_STRING BaseDllName;
	ULONG Flags;
	USHORT LoadCount;
	USHORT TlsIndex;
	union {
		LIST_ENTRY HashLinks;
		struct {
			PVOID SectionPointer;
			ULONG CheckSum;
		};
	};
	union {
		struct {
			ULONG TimeDateStamp;
		};
		struct {
			PVOID LoadedImports;
		};
	};
}LDR_DATA_TABLE_ENTRY, *PLDR_DATA_TABLE_ENTRY;

NTSTATUS DriverEntry(PDRIVER_OBJECT pDriverObj, PUNICODE_STRING pRegPath)
{
	ULONG iCount = 0;
	NTSTATUS ntStatus;
	pDriverObj->DriverUnload = DriverUnLoad;

	KdBreakPoint();

	/*
	主要是遍历DriverObject中的 DriverSection 它能够解释为LDR_DATA_TABLE_ENTRY结构体
	*/

	
	PLDR_DATA_TABLE_ENTRY pLdr = NULL;
	PLIST_ENTRY pListEntry = NULL;
	PLIST_ENTRY pCurrentListEntry = NULL;

	PLDR_DATA_TABLE_ENTRY pCurrentModule = NULL;
	pLdr = (PLDR_DATA_TABLE_ENTRY)pDriverObj->DriverSection;
	pListEntry = pLdr->InLoadOrderLinks.Flink;
	pCurrentListEntry = pListEntry->Flink;

	while (pCurrentListEntry != pListEntry) //先后不相等
	{
		//获取LDR_DATA_TABLE_ENTRY结构
		pCurrentModule = CONTAINING_RECORD(pCurrentListEntry, LDR_DATA_TABLE_ENTRY, InLoadOrderLinks);
		
			if (pCurrentModule->BaseDllName.Buffer != 0)
			{
				DbgPrint("ModuleName = %wZ ModuleBase = %p \r\n", 
					pCurrentModule->BaseDllName,
				 pCurrentModule->DllBase);
			}
			pCurrentListEntry = pCurrentListEntry->Flink;
	}
	return STATUS_SUCCESS;
}

结果.

代码简单改一下.还能够得到指定的模块的基址以及结束地址.

代码以下

VOID GetModuleBaseByName(PDRIVER_OBJECT pDriverObj,UNICODE_STRING ModuleName)
{
	PLDR_DATA_TABLE_ENTRY pLdr = NULL;
	PLIST_ENTRY pListEntry = NULL;
	PLIST_ENTRY pCurrentListEntry = NULL;

	PLDR_DATA_TABLE_ENTRY pCurrentModule = NULL;
	pLdr = (PLDR_DATA_TABLE_ENTRY)pDriverObj->DriverSection;
	pListEntry = pLdr->InLoadOrderLinks.Flink;
	pCurrentListEntry = pListEntry->Flink;

	while (pCurrentListEntry != pListEntry) //先后不相等
	{
		//获取LDR_DATA_TABLE_ENTRY结构
		pCurrentModule = CONTAINING_RECORD(pCurrentListEntry, LDR_DATA_TABLE_ENTRY, InLoadOrderLinks);

		if (pCurrentModule->BaseDllName.Buffer != 0)
		{
		
			if (RtlCompareUnicodeString(&pCurrentModule->BaseDllName, &ModuleName, TRUE) == 0)
			{
				DbgPrint("ModuleName = %wZ ModuleBase = %p ModuleEndBase = %p\r\n",
					pCurrentModule->BaseDllName,
					pCurrentModule->DllBase,
					(LONGLONG)pCurrentModule->DllBase + pCurrentModule->SizeOfImage);
			}
			
		}
		pCurrentListEntry = pCurrentListEntry->Flink;
	}
}