通过驱动对象找到nt模块、得到函数地址
本人无聊研究微点的驱动，发现里面有找到nt模块的方法，以前没遇见过，发出来供大家参考。
知道此方法的人，请飞过。
思路：
DRIVER_OBJECT里的变量DriverSection是指向LDR_DATA_TABLE_ENTRY的指针，通过遍历LDR_DATA_TABLE_ENTRY来查找nt模块。
typedef struct _DRIVER_OBJECT {
+0x000 CSHORT Type;
+0x002 CSHORT Size;
+0x004 PDEVICE_OBJECT DeviceObject; //指向驱动最近创建的设备对象，驱动通过DeviceObject->NextDevice可以得到这个驱动创建的所有设备对象。
+0x008 ULONG Flags;
+0x00c PVOID DriverStart;
+0x010 ULONG DriverSize;
+0x014 PVOID DriverSection; // 为指针PLDR_DATA_TABLE_ENTRY
+0x018 PDRIVER_EXTENSION DriverExtension;
+0x01c UNICODE_STRING DriverName;
+0x024 PUNICODE_STRING HardwareDatabase;
+0x028 struct _FAST_IO_DISPATCH *FastIoDispatch;
+0x02c PDRIVER_INITIALIZE DriverInit; // 保存DriverEntry地址
+0x030 PDRIVER_STARTIO DriverStartIo; // 这个函数是用来异步处理IRP包的
+0x034 PDRIVER_UNLOAD DriverUnload;
+0x038 PDRIVER_DISPATCH MajorFunction[IRP_MJ_MAXIMUM_FUNCTION + 1];
} DRIVER_OBJECT;
typedef struct _LDR_DATA_TABLE_ENTRY {
LIST_ENTRY LoadOrder;
LIST_ENTRY MemoryOrder;
LIST_ENTRY InitializationOrder;
PVOID ModuleBaseAddress;
PVOID EntryPoint;
ULONG ModuleSize;
UNICODE_STRING FullModuleName;
UNICODE_STRING ModuleName;
ULONG Flags;
USHORT LoadCount;
USHORT TlsIndex;
union {
LIST_ENTRY Hash;
struct {
PVOID SectionPointer;
ULONG CheckSum;
};
};
ULONG TimeStamp;
} LDR_DATA_TABLE_ENTRY, *PLDR_DATA_TABLE_ENTRY;
详细请看图：
下面是代码： 在xp sp3 32bit下测试，OK
extern ULONG NtBuildNumber;
ULONG pDllBaseOfNt_dword_254B4 = 0;
ULONG pSizeOfImageOfNt_dword_254B8 = 0;
ULONG pAddrOf_LDR_DATA_TABLE_ENTRYOfNt_dword_254AC = 0;
ULONG puniFullDllNameOfNt_dword_254C0 = 0;
ULONG pKeInsertQueueApc_dword_23718 = 0;
ULONG pKeInsertQueueApc_dword_22110 = 0;
ULONG pMmGetSystemRoutineAddress_dword_23724 = 0;
ULONG pIofCallDriver_dword_23730 = 0;
ULONG pObReferenceObjectByName_dword_23754 = 0;
ULONG pIoRegisterDriverReinitialization_dword_2376C = 0;
ULONG pMmUnmapViewOfSection_dword_23778 = 0;
ULONG pPsSetCreateProcessNotifyRoutine_dword_23784 = 0;
ULONG pPsSetCreateThreadNotifyRoutine_dword_23790 = 0;
ULONG pPsSetLoadImageNotifyRoutine_dword_2379C = 0;
ULONG pPsTerminateSystemThread_dword_22084 = 0;
ULONG pPsCreateSystemThread_dword_21F00 = 0;
// PDRIVER_OBJECT
int __stdcall sub_10AC4(int pDRIVER_OBJECT)
{
int result; // eax@1
int pDriverSection_v2; // edi@2
unsigned int pModuleBaseAddress_v3; // ecx@4
int uModuleSize_v4; // edx@4
int v5; // ecx@8
result = pDRIVER_OBJECT;
if ( pDRIVER_OBJECT )
{
pDriverSection_v2 = *(DWORD *)(pDRIVER_OBJECT + 0x14);// pDriverSection_v2指向
// typedef struct _LDR_DATA_TABLE_ENTRY {
// LIST_ENTRY LoadOrder;
// LIST_ENTRY MemoryOrder;
// LIST_ENTRY InitializationOrder;
// PVOID ModuleBaseAddress;
// PVOID EntryPoint;
// ULONG ModuleSize;
// UNICODE_STRING FullModuleName;
// UNICODE_STRING ModuleName;
// ULONG Flags;
// USHORT LoadCount;
// USHORT TlsIndex;
// union {
// LIST_ENTRY Hash;
// struct {
// PVOID SectionPointer;
// ULONG CheckSum;
// };
// };
// ULONG TimeStamp;
// } LDR_DATA_TABLE_ENTRY, *PLDR_DATA_TABLE_ENTRY;
if ( pDriverSection_v2 )
{
result = *(DWORD *)(pDriverSection_v2 + 4);
if ( result != pDriverSection_v2 )
{
while ( 1 ) // 通过当前驱动对象，循环查找nt模块的基址和大小，
{
pModuleBaseAddress_v3 = *(DWORD *)(result + 24);
uModuleSize_v4 = *(DWORD *)(result + 32);
if ( (unsigned int)NtBuildNumber > pModuleBaseAddress_v3 )
{
if ( (unsigned int)NtBuildNumber < uModuleSize_v4 + pModuleBaseAddress_v3 )
break;
}
result = *(DWORD *)(result + 4);
if ( result == pDriverSection_v2 )
return result;
}
pDllBaseOfNt_dword_254B4 = *(DWORD *)(result + 24);// nt模块基址
pSizeOfImageOfNt_dword_254B8 = uModuleSize_v4;// nt模块大小
v5 = *(DWORD *)(result + 4);
result += 0x24u;
pAddrOf_LDR_DATA_TABLE_ENTRYOfNt_dword_254AC = v5;// 这个变量保存nt的结构体_LDR_DATA_TABLE_ENTRY的地址
puniFullDllNameOfNt_dword_254C0 = result;
}
}
}
return result;
};
// 得到指定函数地址
int __stdcall GetFunAddr_f0048(int pModuleBase, const char *pFunName)
{
int v2; // ecx@3
int v3; // ecx@4
int v4; // eax@5
int v5; // esi@6
int v6; // edi@6
int v7; // ebx@6
int result; // eax@11
unsigned int v9; // [sp+Ch] [bp-1Ch]@7
int v10; // [sp+14h] [bp-14h]@7
unsigned int v11; // [sp+18h] [bp-10h]@6
unsigned int v12; // [sp+1Ch] [bp-Ch]@6
unsigned int v13; // [sp+20h] [bp-8h]@5
unsigned int v14; // [sp+24h] [bp-4h]@6
if ( pModuleBase
&& pFunName
&& (v2 = pModuleBase + *(DWORD *)(pModuleBase + 60)) != 0
&& (v3 = v2 + 120) != 0
&& (v13 = *(DWORD *)v3, (v4 = pModuleBase + *(DWORD *)v3) != 0)
&& (v14 = 0,
v5 = pModuleBase + *(DWORD *)(v4 + 28),
v6 = pModuleBase + *(DWORD *)(v4 + 36),
v7 = pModuleBase + *(DWORD *)(v4 + 32),
v11 = *(DWORD *)(v4 + 24),
v12 = *(DWORD *)(v3 + 4),
v11) )
{
while ( 1 )
{
v10 = *( WORD *)(v6 + 2 * v14);
v9 = *(DWORD *)(v5 + 4 * v10);
if ( v9 < v13 || v9 > v13 + (unsigned __int64)v12 )
{
if ( !_stricmp((const char *)(pModuleBase + *(DWORD *)(v7 + 4 * v14)), pFunName) )
break;
}
++v14;
if ( v14 >= v11 )
goto LABEL_11;
}
result = pModuleBase + *(DWORD *)(v5 + 4 * v10);
}
else
{
LABEL_11:
result = 0;
}
return result;
};
int __cdecl sub_15AAE()
{
int v0; // eax@1
int result; // eax@1
/* memset(&dword_23700, 0, 0xA0u);
dword_23700 = 13;
//*/
v0 = GetFunAddr_f0048(pDllBaseOfNt_dword_254B4, "KeInsertQueueApc");
pKeInsertQueueApc_dword_23718 = v0;
pKeInsertQueueApc_dword_22110 = v0;
pMmGetSystemRoutineAddress_dword_23724 = GetFunAddr_f0048(pDllBaseOfNt_dword_254B4, "MmGetSystemRoutineAddress");
pIofCallDriver_dword_23730 = GetFunAddr_f0048(pDllBaseOfNt_dword_254B4, "IofCallDriver");
pObReferenceObjectByName_dword_23754 = GetFunAddr_f0048(pDllBaseOfNt_dword_254B4, "ObReferenceObjectByName");
pIoRegisterDriverReinitialization_dword_2376C = GetFunAddr_f0048(
pDllBaseOfNt_dword_254B4,
"IoRegisterDriverReinitialization");
pMmUnmapViewOfSection_dword_23778 = GetFunAddr_f0048(pDllBaseOfNt_dword_254B4, "MmUnmapViewOfSection");
pPsSetCreateProcessNotifyRoutine_dword_23784 = GetFunAddr_f0048(
pDllBaseOfNt_dword_254B4,
"PsSetCreateProcessNotifyRoutine");
pPsSetCreateThreadNotifyRoutine_dword_23790 = GetFunAddr_f0048(
pDllBaseOfNt_dword_254B4,
"PsSetCreateThreadNotifyRoutine");
pPsSetLoadImageNotifyRoutine_dword_2379C = GetFunAddr_f0048(pDllBaseOfNt_dword_254B4, "PsSetLoadImageNotifyRoutine");
pPsTerminateSystemThread_dword_22084 = GetFunAddr_f0048(pDllBaseOfNt_dword_254B4, "PsTerminateSystemThread");
result = GetFunAddr_f0048(pDllBaseOfNt_dword_254B4, "PsCreateSystemThread");
pPsCreateSystemThread_dword_21F00 = result;
return result;
};
