InlineHookSwapContext

作用：

枚举进程，获取隐藏进程的EPROCESS

源码地址：

https://github.com/haidragon/HookSwapContext

#include

#include "hash.h"

#include "xde.h"

#include "main.h"

typedef struct _BYTECODE

{

BYTE *pAddress;

SIZE_T size;

} BYTECODE, *PBYTECODE;

typedef struct _OFFSETS

{

BYTE threadsProcess;

BYTE CID;

BYTE imageFilename;

BYTE crossThreadFlags;

unsigned PID;

unsigned PPID;

unsigned pecreatetimeoff;

unsigned peexittimeoff;

} OFFSETS, *POFFSETS;

#define JMP_SIZE 5

#define SIG_SIZE 20

#define HASHTABLE_SIZE 256

#define MAINTAG1 'NIAM'

// NOTICE: WinDbg gives offsets in BYTEs, we use DWORDS.

OFFSETS offsets;

// The beginning of the SwapContext function is stored here.

BYTE *pSwapContext = NULL;

// The trampoline function which executes the replaced code and

// passes control to the hooked function.

BYTECODE trampoline;

// Inline assembler does not support structures, so this points

// directly to the pCode of the _BYTECODE structure.

BYTE *pTrampoline = NULL;

// The hashtable where we store the data.

PHASHTABLE pHashTable = NULL;

DWORD num = 0;

extern USHORT *NtBuildNumber;

const WCHAR devicelinkBuffer[] = L"\DosDevices\SwapContextDrv";

const WCHAR deviceNameBuffer[] = L"\Device\SwapContextDrv";

PDEVICE_OBJECT g_HookDevice;

ULONG gNameOffset = 0x174;

PsLookupThreadByThreadId(

IN PVOID UniqueThreadId,

OUT PETHREAD *ppEthread

);

KIRQL OldIrql;

KSPIN_LOCK DpcSpinLock;

ULONG GetLocationOfProcessName(PEPROCESS CurrentProc)

{

ULONG ul_offset;

for(ul_offset = 0; ul_offset < PAGE_SIZE; ul_offset++) // This will fail if EPROCESS

// grows bigger than PAGE_SIZE

{

if( !strncmp( "System", (PCHAR) CurrentProc + ul_offset, strlen("System")))

{

return ul_offset;

}

return (ULONG) 0;

}

// This function returns an MDL to an nonpaged virtual memory area.

// IN pVirtualAddress Virtual address to the start of the memory area.

// IN length Length of the memory area in bytes.

// OUT PMDL Mdl to the nonpaged virtual memory area.

PMDL GetMdlForNonPagedMemory(PVOID pVirtualAddress, SIZE_T length)

{

PMDL pMdl;

if (length >= (PAGE_SIZE * (65535 - sizeof(MDL)) / sizeof(ULONG_PTR)))

{

DbgPrint("Size parameter passed to IoAllocateMdl is too big!n");

return NULL;

}

pMdl = IoAllocateMdl((PVOID)pVirtualAddress, length, FALSE, FALSE, NULL);

if (NULL == pMdl)

{

DbgPrint("IoAllocateMdl returned NULL!n");

return NULL;

}

MmBuildMdlForNonPagedPool(pMdl);

return pMdl;

}

// This function returns an MDL to a paged virtual memory area while

// making sure the pages are not paged out to the disk.

// IN pVirtualAddress Virtual address to the start of the memory area.

// IN length Length of the memory area in bytes.

// IN operation Desired mode of operation.

// OUT PMDL Mdl to the locked and nonpaged memory area.

PMDL GetMdlForPagedMemory(PVOID pVirtualAddress, SIZE_T length, LOCK_OPERATION operation)

{

PMDL pMdl;

if (length >= (PAGE_SIZE * (65535 - sizeof(MDL)) / sizeof(ULONG_PTR)))

{

DbgPrint("Size parameter passed to IoAllocateMdl is too big!n");

return NULL;

}

pMdl = IoAllocateMdl((PVOID)pVirtualAddress, length, FALSE, FALSE, NULL);

if (NULL == pMdl)

{

DbgPrint("IoAllocateMdl returned NULL!n");

return NULL;

}

// Make sure the memory is not paged on the disk.

try

{

MmProbeAndLockPages(pMdl, KernelMode, operation);

}

except (EXCEPTION_EXECUTE_HANDLER)

{

DbgPrint("MmProbeAndLockPages caused an exception!n");

IoFreeMdl(pMdl);

return NULL;

}

return pMdl;

}

// This function writes the given data to the given non-paged kernel memory location.

// It makes sure that no other instance can access it in any way until we have finished

// our job.

// IN pDestination Pointer to the kernel memory where we want to write.

// IN pSource Pointer to the data we want to write.

// IN length Length of data we want to write in bytes.

// OUT NTSTATUS return code.

NTSTATUS WriteKernelMemory(BYTE *pDestination, BYTE *pSource, SIZE_T length)

{

KSPIN_LOCK spinLock;

KLOCK_QUEUE_HANDLE lockHandle;

PMDL pMdl;

PVOID pAddress;

pMdl = GetMdlForNonPagedMemory(pDestination, length);

if (NULL == pMdl)

{

DbgPrint("GetMdlForSafeKernelMemoryArea returned NULL!n");

return STATUS_UNSUCCESSFUL;

}

pAddress = MmGetSystemAddressForMdlSafe(pMdl, HighPagePriority);

if (pAddress == NULL)

{

IoFreeMdl(pMdl);

DbgPrint("MmGetSystemAddressForMdlSafe returned NULL!n");

return STATUS_UNSUCCESSFUL;

}

KeInitializeSpinLock(&spinLock);

// only supported on XP and later. For Windows 2000 compatibility you can

// use the older, less efficient and less reliable KeAcquireSpinLock function.

KeAcquireInStackQueuedSpinLock (&spinLock, &lockHandle);

// We have the spinlock, so we can safely overwrite the kernel memory.

RtlCopyMemory(pAddress, pSource, length);

KeReleaseInStackQueuedSpinLock(&lockHandle);

IoFreeMdl(pMdl);

return STATUS_SUCCESS;

}

void __stdcall ProcessData(DWORD *pEthread)

{

DWORD *pEprocess = (DWORD *)*(pEthread + offsets.threadsProcess);

DWORD *pCid = (DWORD *)(pEthread+offsets.CID);

DWORD key = 0;

DATA data = {0};

data.processID = 0x0;

data.threadID = 0x0;

data.imageName = "NONE";

key = (DWORD)pEthread;

if (pCid != NULL)

{

data.processID = *pCid;

data.threadID = *(pCid + 0x1);

}

if (pEprocess != NULL)

{

data.imageName = (BYTE *)(pEprocess+offsets.imageFilename);

data.xlow = *(DWORD *)(pEprocess+offsets.peexittimeoff);

data.xhigh = *(DWORD *)(pEprocess+offsets.peexittimeoff+4);

}

if (*(pEthread + offsets.crossThreadFlags) & 1)

{

KeAcquireSpinLock(&DpcSpinLock,&OldIrql);

Remove(key, pHashTable);

KeReleaseSpinLock(&DpcSpinLock,OldIrql);

}

else

{

KeAcquireSpinLock(&DpcSpinLock,&OldIrql);

Insert(key, &data, pHashTable);

KeReleaseSpinLock(&DpcSpinLock,OldIrql);

}

void __declspec(naked) DetourFunction()

{

__asm

{

// Save parameters we will overwrite. We save all data to play it safe.

pushad

pushfd

// Disable interrupts. Assume single processor machine.

// cli

// EDI holds the thread whose context we will switch out.

push edi//edi寄存器中存放的是要切换出去的线程

call ProcessData

// ESI holds the thread whose context we will switch in.

push esi

call ProcessData

// Enable interrupts.

// sti

// Restore the saved state.

popfd

popad

// Jump to the trampoline function.

jmp dword ptr pTrampoline//弹簧床

}

BYTE * GetSwapAddr()

{

BYTE *res = 0;

NTSTATUS Status;

PETHREAD Thread;

if (*NtBuildNumber <= 2195)

Status = PsLookupThreadByThreadId((PVOID)4, &Thread);

else

Status = PsLookupThreadByThreadId((PVOID)8, &Thread);

if (NT_SUCCESS(Status))

{

if (MmIsAddressValid(Thread))

res = (BYTE *)(*(ULONG *)((BYTE *)(Thread)+0x28));

if (MmIsAddressValid(res+8))

res = (BYTE *)(*(ULONG *)(res+8));

else

res = 0;

}

return res;

}

ULONG GetFunctionAddr( IN PCWSTR FunctionName)

{

UNICODE_STRING UniCodeFunctionName;

RtlInitUnicodeString( &UniCodeFunctionName, FunctionName );

return (ULONG)MmGetSystemRoutineAddress( &UniCodeFunctionName );

}

VOID DoFindSwap(IN PVOID pContext)

{

NTSTATUS ret;

PSYSTEM_MODULE_INFORMATION module = NULL;

ULONG n=0;

void *buf = NULL;

ULONG ntosknlbase;

ULONG ntosknlEndAddr;

ULONG curAddr;

ULONG code1_sp1=0xc626c90a,code2_sp1=0x9c022d46,code3_sp1=0xbb830b8b,code4_sp1=0x00000994;

ULONG code1,code2,code3,code4;

ULONG i;

NtQuerySystemInformation=(NTQUERYSYSTEMINFORMATION)GetFunctionAddr(L"NtQuerySystemInformation");

if (!NtQuerySystemInformation)

{

DbgPrint("Find NtQuerySystemInformation faild!");

goto Ret;

}

ret=NtQuerySystemInformation(SystemModuleInformation,&n,0,&n);

if (NULL==( buf=ExAllocatePoolWithTag(NonPagedPool, n, 'PAWS')))

{

DbgPrint("ExAllocatePool() failedn" );

goto Ret;

}

ret=NtQuerySystemInformation(SystemModuleInformation,buf,n,NULL);

if (!NT_SUCCESS(ret)) {

DbgPrint("NtQuerySystemInformation faild!");

goto Ret;

}

module=(PSYSTEM_MODULE_INFORMATION)((PULONG)buf+1);

ntosknlEndAddr=(ULONG)module->base+(ULONG)module->Size;

ntosknlbase=(ULONG)module->base;

curAddr=ntosknlbase;

ExFreePool(buf);

code1 = code1_sp1;

code2 = code2_sp1;

code3 = code3_sp1;

code4 = code4_sp1;

for (i=curAddr;i<=ntosknlEndAddr;i++)

{

if (*((ULONG *)i)==code1)

{

if (*((ULONG *)(i+4))==code2)

{

if (*((ULONG *)(i+8))==code3)

{

if (*((ULONG *)(i+12))==code4)

{

pSwapContext=(BYTE *)i;

break;

}

Ret:

PsTerminateSystemThread(STATUS_SUCCESS);

}

void FindSwapAddr()

{

HANDLE hThread = NULL;

PVOID objtowait = 0;

NTSTATUS dwStatus =

PsCreateSystemThread(

&hThread,

NULL,

(HANDLE)0,

NULL,

DoFindSwap,

NULL

);

if ((KeGetCurrentIrql())!=PASSIVE_LEVEL)

{

KfRaiseIrql(PASSIVE_LEVEL);

}

if ((KeGetCurrentIrql())!=PASSIVE_LEVEL)

{

return;

}

ObReferenceObjectByHandle(

hThread,

THREAD_ALL_ACCESS,

NULL,

KernelMode,

&objtowait,

NULL

);

KeWaitForSingleObject(objtowait,Executive,KernelMode,FALSE,NULL); //NULL表示无限期等待.

return;

}

NTSTATUS InstallSwapContextHook()

{

NTSTATUS rc;

int length = 0;

int totalLength = 0;

struct xde_instr instr;

BYTE *pJmpCode = NULL;

long displacement = 0;

__asm

{

push eax

mov eax, CR0

and eax, 0FFFEFFFFh

mov CR0, eax

pop eax

}

// Disassemble the code to get how many bytes we have to replace.

// We use XDE v1.01 by Z0MBie (http://z0mbie.host.sk/).

while (totalLength < 5)

{

length = xde_disasm(pSwapContext + totalLength, &instr);

if (length == 0)

{

DbgPrint("xde_disasm returned 0!n");

return STATUS_UNSUCCESSFUL;

}

totalLength += length;

}

DbgPrint("Hook will replace the first %d bytes.n", totalLength);

// Allocate the required bytes for the trampoline function.

//pTrampoline:是保存原来的被替换的指令+JMP指令

pTrampoline = trampoline.pAddress = ExAllocatePoolWithTag(NonPagedPool, totalLength + 5, MAINTAG1);

if (trampoline.pAddress == NULL)

{

DbgPrint("ExAllocatePoolWithTag returned NULL!n");

return STATUS_UNSUCCESSFUL;

}

DbgPrint("Trampoline is at 0x%xn", pTrampoline);

// This tells how many bytes we replaced from the original function.

//备份原来的指令

trampoline.size = totalLength;

RtlCopyMemory(trampoline.pAddress, pSwapContext, totalLength);

// We are using JMP rel32 instruction to jump to the rest of the

// swapcontext function, so we first calculate the 32bit displacement

// and then create the five byte JMP instruction.

//在备份完原来的指令后，在后面构造一个跳回去的jmp指令

//displacement是跳回去的偏移

displacement = (pSwapContext + totalLength) - (trampoline.pAddress + totalLength + JMP_SIZE);

pJmpCode = trampoline.pAddress + totalLength;

//直接的jmp分3种

//Short Jump（短跳转）机器码 EB rel8

//只能跳转到256字节的范围内

//Near Jump（近跳转）机器码 E9 rel16/32

//可跳至同一个段的范围内的地址

//Far Jump（远跳转）机器码EA ptr 16:16/32

//可跳至任意地址，使用48位/32位全指针

*pJmpCode = 0xe9;

RtlCopyMemory(pJmpCode+1, &displacement, 4);

//执行这个时候，被替换的指令备份就已经完成

//接下来，就应该生成一个jmp指令，覆盖原来的指令

// Allocate the required bytes for the jmp code to the detour function.

pJmpCode = ExAllocatePoolWithTag(NonPagedPool, totalLength, MAINTAG1);

if (pJmpCode == NULL)

{

DbgPrint("ExAllocatePoolWithTag returned NULL!n");

return STATUS_UNSUCCESSFUL;

}

// Initialize the jmp-code with NOPs.

RtlFillMemory(pJmpCode, totalLength, 0x90);

// We are using JMP rel32 instruction to jump to our hook function,

// so we first calculate the 32bit displacement and then create the

// five byte JMP instruction.

displacement = ((BYTE *)&DetourFunction) - (pSwapContext + JMP_SIZE);

*pJmpCode = 0xe9;

RtlCopyMemory(pJmpCode+1, &displacement, 4);

//inline hook完成

rc = WriteKernelMemory(pSwapContext, pJmpCode, totalLength);

ExFreePoolWithTag(pJmpCode, MAINTAG1);

__asm

{

push eax

mov eax, CR0

or eax, NOT 0FFFEFFFFh

mov CR0, eax

pop eax

}

return rc;

}

// This function removes our hook by restoring the bytes we have replaced

// from the original SwapContext function.

// OUT NTSTATUS return value.

NTSTATUS UninstallSwapContextHook()

{

return WriteKernelMemory(pSwapContext, trampoline.pAddress, trampoline.size);

}

NTSTATUS onUnload(IN PDRIVER_OBJECT DriverObject)

{

NTSTATUS rc;

UNICODE_STRING devicelinkUnicodeString;

PDEVICE_OBJECT p_NextObj;

PPROCLIST pTemp = NULL, pt = NULL;

PThreadData pTempT = NULL, pp = NULL;

PDriverData pTempD = NULL, pd = NULL;

PFileList pTempF = NULL, pf = NULL;

DbgPrint("onUnload calledn");

rc = UninstallSwapContextHook();

if (STATUS_SUCCESS == rc)

{

DbgPrint("UninstallSwapContextHook succeeded.n");

}

else

{

DbgPrint("UninstallSwapContextHook failed!n");

}

// Show the collected data and release all resources.

//DumpTable(pHashTable);

KeAcquireSpinLock(&DpcSpinLock,&OldIrql);

DestroyTable(pHashTable);

KeReleaseSpinLock(&DpcSpinLock,OldIrql);

//num = 0;

ExFreePoolWithTag(pTrampoline, MAINTAG1);

// Delete the symbolic link for our device

RtlInitUnicodeString( &devicelinkUnicodeString, devicelinkBuffer );

IoDeleteSymboliclink( &devicelinkUnicodeString );

// Delete the device object

IoDeleteDevice( DriverObject->DeviceObject );

//return STATUS_SUCCESS;

return rc;

}

NTSTATUS DispatchCreate (

IN PDEVICE_OBJECT pDevObj,

IN PIRP pIrp )

{

pIrp->IoStatus.Status = STATUS_SUCCESS;

pIrp->IoStatus.Information = 0; // no bytes xfered

IoCompleteRequest( pIrp, IO_NO_INCREMENT );

return STATUS_SUCCESS;

}

NTSTATUS DriverEntry(IN PDRIVER_OBJECT DriverObject, IN PUNICODE_STRING RegistryPath)

{

RTL_OSVERSIonINFOW osvi;

NTSTATUS ntStatus;

UNICODE_STRING deviceNameUnicodeString;

UNICODE_STRING devicelinkUnicodeString;

RTL_OSVERSIonINFOEXW VersionInfo;

ULonGLONG ConditionMask = 0;

memset(&VersionInfo,0,sizeof(VersionInfo));

VER_SET_ConDITION (

ConditionMask,

VER_SERVICEPACKMAJOR,

VER_EQUAL

);

DbgPrint("DriverEntry called.n");

RtlZeroMemory(&osvi, sizeof(RTL_OSVERSIONINFOW));

osvi.dwOSVersionInfoSize = sizeof(RTL_OSVERSIONINFOW);

// Initialize the OS specific data.

// gNameOffset = GetLocationOfProcessName(PsGetCurrentProcess());

// if (!gNameOffset)

// return STATUS_UNSUCCESSFUL;

if (STATUS_SUCCESS == RtlGetVersion(&osvi))

{

if (osvi.dwMajorVersion == 5 && osvi.dwMinorVersion == 1) //Windows XP

{

offsets.pecreatetimeoff = 0x070;

offsets.peexittimeoff = 0x078;

offsets.CID = 0x7b;

offsets.threadsProcess = 0x88;

offsets.crossThreadFlags = 0x92;

offsets.imageFilename = 0x5d;

}

//VersionInfo.wServicePackMajor = 3;

//if( STATUS_SUCCESS==RtlVerifyVersionInfo(&VersionInfo,VER_SERVICEPACKMAJOR,ConditionMask))//sp3

//{

//}

else

{

//更多的调试

DbgPrint("Unsupported OS version!n");

return STATUS_UNSUCCESSFUL;

}

else

{

DbgPrint("RtlGetVersion failed!n");

return STATUS_UNSUCCESSFUL;

}

RtlInitUnicodeString (&deviceNameUnicodeString,

deviceNameBuffer );

RtlInitUnicodeString (&devicelinkUnicodeString, devicelinkBuffer);

ntStatus = IoCreateDevice ( DriverObject,

0, // For driver extension

&deviceNameUnicodeString,

FILE_DEVICE_UNKNOWN,

TRUE,

&g_HookDevice );

if(! NT_SUCCESS(ntStatus))

{

DbgPrint(("Failed to create device!n"));

return ntStatus;

}

ntStatus = IoCreateSymboliclink (&devicelinkUnicodeString,

&deviceNameUnicodeString );

if(! NT_SUCCESS(ntStatus))

{

IoDeleteDevice(DriverObject->DeviceObject);

DbgPrint("Failed to create symbolic link!n");

return ntStatus;

}

DriverObject->DriverUnload = OnUnload;

pHashTable = InitializeTable(HASHTABLE_SIZE);

if (pHashTable == NULL)

{

DbgPrint("InitializeTable failed!n");

return STATUS_UNSUCCESSFUL;

}

//pSwapContext = GetSwapAddr();

FindSwapAddr();

if(NULL==pSwapContext)

{

DbgPrint("SwapContext addr not found!n");

return STATUS_UNSUCCESSFUL;

}

else

{

DbgPrint("SwapContext found at 0x%xn", pSwapContext);

ntStatus = InstallSwapContextHook();

}

if (STATUS_SUCCESS == ntStatus)

{

DbgPrint("InstallSwapContextHook succeeded.n");

DbgPrint("DetourFunction is at 0x%xn", DetourFunction);

}

else

{

DbgPrint("InstallSwapContextHook failed!n");

return STATUS_UNSUCCESSFUL;

}

return STATUS_SUCCESS;

}

InlineHookSwapContext

C/C++/C#相关栏目本月热门文章