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[转] hook PsCreateSystemThread

Posted on 2009-09-17 21:59 S.l.e!ep.￠% 阅读(780) 评论(0) 编辑收藏引用所属分类: Windows WDM

hook PsCreateSystemThread

很多RootKit在ring0下利用PsCreateSystemThread来创建系统线程做某些WS的事情，我们平时不利用ARK工具的话，是很难发现这些线程，在某些情况下，需要anti一些特定的rootkit，这里给出一个简单的示例：

.h:

#pragma once

#include <ntddk.h>

typedef long LONG;

typedef unsigned char BOOL, *PBOOL;

typedef unsigned char BYTE, *PBYTE;

typedef unsigned long DWORD, *PDWORD;

typedef unsigned short WORD, *PWORD;

typedef void *HMODULE;

typedef long NTSTATUS, *PNTSTATUS;

typedef unsigned long DWORD;

typedef DWORD * PDWORD;

typedef unsigned long ULONG;

typedef unsigned long ULONG_PTR;

typedef ULONG *PULONG;

typedef unsigned short WORD;

typedef unsigned char BYTE;

typedef unsigned char UCHAR;

typedef unsigned short USHORT;

typedef void *PVOID;

typedef BYTE BOOLEAN;

#define SEC_IMAGE 0x01000000

NTSTATUS

PsLookupProcessByProcessId(

IN HANDLE ProcessId,

OUT PEPROCESS *Process

);

.c:

#include "HookPsThread.h"

/******************************************************************************

Hook PsCreateSystemThread

out adress

******************************************************************************/

//=============================================================================

// Version Define

//=============================================================================

#define EPROCESS_SIZE 1

#define PEB_OFFSET 2

#define FILE_NAME_OFFSET 3

#define PROCESS_LINK_OFFSET 4

#define PROCESS_ID_OFFSET 5

#define EXIT_TIME_OFFSET 6

//=============================================================================

// Logic Define

//=============================================================================

ULONG PsCreateSystemThreadAddr = 0;

char PsCreateSystemThreadData[5] = {0};

DWORD ProcessNameOffset;

//-----------------------------------------------------------------------------

// GetPlantformDependentInfo

//-----------------------------------------------------------------------------

DWORD GetPlantformDependentInfo( DWORD dwFlag )

{

DWORD current_build;

DWORD ans = 0;

PsGetVersion(NULL, NULL, &current_build, NULL);

switch ( dwFlag )

{

case EPROCESS_SIZE:

if (current_build == 2195) ans = 0 ; // 2000，当前不支持2000，下同

if (current_build == 2600) ans = 0x25C; // xp

if (current_build == 3790) ans = 0x270; // 2003

break;

case PEB_OFFSET:

if (current_build == 2195) ans = 0;

if (current_build == 2600) ans = 0x1b0;

if (current_build == 3790) ans = 0x1a0;

break;

case FILE_NAME_OFFSET:

if (current_build == 2195) ans = 0;

if (current_build == 2600) ans = 0x174;

if (current_build == 3790) ans = 0x164;

break;

case PROCESS_LINK_OFFSET:

if (current_build == 2195) ans = 0;

if (current_build == 2600) ans = 0x088;

if (current_build == 3790) ans = 0x098;

break;

case PROCESS_ID_OFFSET:

if (current_build == 2195) ans = 0;

if (current_build == 2600) ans = 0x084;

if (current_build == 3790) ans = 0x094;

break;

case EXIT_TIME_OFFSET:

if (current_build == 2195) ans = 0;

if (current_build == 2600) ans = 0x078;

if (current_build == 3790) ans = 0x088;

break;

}

return ans;

}

//-----------------------------------------------------------------------------

// GetFunctionAddr

//-----------------------------------------------------------------------------

ULONG GetFunctionAddr( IN PCWSTR FunctionName)

{

UNICODE_STRING UniCodeFunctionName;

RtlInitUnicodeString( &UniCodeFunctionName, FunctionName );

return (ULONG)MmGetSystemRoutineAddress( &UniCodeFunctionName );

}

//-----------------------------------------------------------------------------

// _PsCreateSystemThread

//-----------------------------------------------------------------------------

NTSTATUS _PsCreateSystemThread(IN PKSTART_ROUTINE StartRoutine)

{

ULONG RAddr = (ULONG)StartRoutine; //Routine Address

//Get Process Info

LPTSTR CurProc;

PEPROCESS EProcess;

PsLookupProcessByProcessId(PsGetCurrentProcessId(), &EProcess);

CurProc =(LPTSTR)EProcess;

CurProc =CurProc+ProcessNameOffset;

if (strncmp((char*)CurProc,"System",6) != 0)

{

DbgPrint("Current Process : %s, StartRoutine : %X\n", (char *)CurProc, StartRoutine);

}

return 0;

}

//-----------------------------------------------------------------------------

// MyPsCreateSystemThread

//-----------------------------------------------------------------------------

__declspec (naked)void MyPsCreateSystemThread()

{

_asm

{

pushad

push [esp+20h+18h]

call _PsCreateSystemThread

popad

mov edi,edi

push ebp

mov ebp,esp

jmp PsCreateSystemThreadAddr

}

//-----------------------------------------------------------------------------

// Install Hook

//-----------------------------------------------------------------------------

VOID InHook()

{

PsCreateSystemThreadAddr = GetFunctionAddr(L"PsCreateSystemThread");

__asm

{

push eax

mov eax, CR0

and eax, 0FFFEFFFFh

mov CR0, eax

pop eax

}

//Save asmCode

memcpy(PsCreateSystemThreadData, (PVOID)PsCreateSystemThreadAddr, 5);

(ULONG)PsCreateSystemThreadAddr += 5;

//Inline PsCreateSystemThread

__asm

{

mov esi, PsCreateSystemThreadAddr

sub esi, 5

mov byte ptr[esi], 0xE9

lea eax, [MyPsCreateSystemThread]

sub eax, esi

sub eax, 5

mov dword ptr [esi+1],eax

}

__asm

{

push eax

mov eax, CR0

or eax, NOT 0FFFEFFFFh

mov CR0, eax

pop eax

}

DbgPrint("Hooked OK

.\n");

return;

}

//-----------------------------------------------------------------------------

// Uninstall Hook

//-----------------------------------------------------------------------------

VOID UnHook()

{

__asm

{

push eax

mov eax, CR0

and eax, 0FFFEFFFFh

mov CR0, eax

pop eax

}

(ULONG)PsCreateSystemThreadAddr -= 5;

memcpy((PVOID)PsCreateSystemThreadAddr, PsCreateSystemThreadData, 5);

__asm

{

push eax

mov eax, CR0

or eax, NOT 0FFFEFFFFh

mov CR0, eax

pop eax

}

DbgPrint("UnHook OK

.\n");

return;

}

//-----------------------------------------------------------------------------

// Driver UnLoad

//-----------------------------------------------------------------------------

void OnUnload(PDRIVER_OBJECT pDriverObj)

{

UnHook();

DbgPrint("UnLoading Driver");

}

//-----------------------------------------------------------------------------

// Driver LoadEntry

//-----------------------------------------------------------------------------

NTSTATUS DriverEntry(PDRIVER_OBJECT pDriverObj, PUNICODE_STRING pRegistryString)

{

pDriverObj->DriverUnload = OnUnload;

DbgPrint("Loading Driver");

ProcessNameOffset = GetPlantformDependentInfo(FILE_NAME_OFFSET);

InHook();

return STATUS_SUCCESS;

}

#pragma once

#include <ntddk.h>

typedef long LONG;

typedef unsigned char BOOL, *PBOOL;

typedef unsigned char BYTE, *PBYTE;

typedef unsigned long DWORD, *PDWORD;

typedef unsigned short WORD, *PWORD;

typedef void *HMODULE;

typedef long NTSTATUS, *PNTSTATUS;

typedef unsigned long DWORD;

typedef DWORD * PDWORD;

typedef unsigned long ULONG;

typedef unsigned long ULONG_PTR;

typedef ULONG *PULONG;

typedef unsigned short WORD;

typedef unsigned char BYTE;

typedef unsigned char UCHAR;

typedef unsigned short USHORT;

typedef void *PVOID;

typedef BYTE BOOLEAN;

#define SEC_IMAGE 0x01000000

NTSTATUS

PsLookupProcessByProcessId(

IN HANDLE ProcessId,

OUT PEPROCESS *Process

);

.c:

#include "HookPsThread.h"

/******************************************************************************

Hook PsCreateSystemThread

out adress

******************************************************************************/

//=============================================================================

// Version Define

//=============================================================================

#define EPROCESS_SIZE 1

#define PEB_OFFSET 2

#define FILE_NAME_OFFSET 3

#define PROCESS_LINK_OFFSET 4

#define PROCESS_ID_OFFSET 5

#define EXIT_TIME_OFFSET 6

//=============================================================================

// Logic Define

//=============================================================================

ULONG PsCreateSystemThreadAddr = 0;

char PsCreateSystemThreadData[5] = {0};

DWORD ProcessNameOffset;

//-----------------------------------------------------------------------------

// GetPlantformDependentInfo

//-----------------------------------------------------------------------------

DWORD GetPlantformDependentInfo( DWORD dwFlag )

{

DWORD current_build;

DWORD ans = 0;

PsGetVersion(NULL, NULL, &current_build, NULL);

switch ( dwFlag )

{

case EPROCESS_SIZE:

if (current_build == 2195) ans = 0 ; // 2000，当前不支持2000，下同

if (current_build == 2600) ans = 0x25C; // xp

if (current_build == 3790) ans = 0x270; // 2003

break;

case PEB_OFFSET:

if (current_build == 2195) ans = 0;

if (current_build == 2600) ans = 0x1b0;

if (current_build == 3790) ans = 0x1a0;

break;

case FILE_NAME_OFFSET:

if (current_build == 2195) ans = 0;

if (current_build == 2600) ans = 0x174;

if (current_build == 3790) ans = 0x164;

break;

case PROCESS_LINK_OFFSET:

if (current_build == 2195) ans = 0;

if (current_build == 2600) ans = 0x088;

if (current_build == 3790) ans = 0x098;

break;

case PROCESS_ID_OFFSET:

if (current_build == 2195) ans = 0;

if (current_build == 2600) ans = 0x084;

if (current_build == 3790) ans = 0x094;

break;

case EXIT_TIME_OFFSET:

if (current_build == 2195) ans = 0;

if (current_build == 2600) ans = 0x078;

if (current_build == 3790) ans = 0x088;

break;

}

return ans;

}

//-----------------------------------------------------------------------------

// GetFunctionAddr

//-----------------------------------------------------------------------------

ULONG GetFunctionAddr( IN PCWSTR FunctionName)

{

UNICODE_STRING UniCodeFunctionName;

RtlInitUnicodeString( &UniCodeFunctionName, FunctionName );

return (ULONG)MmGetSystemRoutineAddress( &UniCodeFunctionName );

}

//-----------------------------------------------------------------------------

// _PsCreateSystemThread

//-----------------------------------------------------------------------------

NTSTATUS _PsCreateSystemThread(IN PKSTART_ROUTINE StartRoutine)

{

ULONG RAddr = (ULONG)StartRoutine; //Routine Address

//Get Process Info

LPTSTR CurProc;

PEPROCESS EProcess;

PsLookupProcessByProcessId(PsGetCurrentProcessId(), &EProcess);

CurProc =(LPTSTR)EProcess;

CurProc =CurProc+ProcessNameOffset;

if (strncmp((char*)CurProc,"System",6) != 0)

{

DbgPrint("Current Process : %s, StartRoutine : %X\n", (char *)CurProc, StartRoutine);

}

return 0;

}

//-----------------------------------------------------------------------------

// MyPsCreateSystemThread

//-----------------------------------------------------------------------------

__declspec (naked)void MyPsCreateSystemThread()

{

_asm

{

pushad

push [esp+20h+18h]

call _PsCreateSystemThread

popad

mov edi,edi

push ebp

mov ebp,esp

jmp PsCreateSystemThreadAddr

}

//-----------------------------------------------------------------------------

// Install Hook

//-----------------------------------------------------------------------------

VOID InHook()

{

PsCreateSystemThreadAddr = GetFunctionAddr(L"PsCreateSystemThread");

__asm

{

push eax

mov eax, CR0

and eax, 0FFFEFFFFh

mov CR0, eax

pop eax

}

//Save asmCode

memcpy(PsCreateSystemThreadData, (PVOID)PsCreateSystemThreadAddr, 5);

(ULONG)PsCreateSystemThreadAddr += 5;

//Inline PsCreateSystemThread

__asm

{

mov esi, PsCreateSystemThreadAddr

sub esi, 5

mov byte ptr[esi], 0xE9

lea eax, [MyPsCreateSystemThread]

sub eax, esi

sub eax, 5

mov dword ptr [esi+1],eax

}

__asm

{

push eax

mov eax, CR0

or eax, NOT 0FFFEFFFFh

mov CR0, eax

pop eax

}

DbgPrint("Hooked OK

.\n");

return;

}

//-----------------------------------------------------------------------------

// Uninstall Hook

//-----------------------------------------------------------------------------

VOID UnHook()

{

__asm

{

push eax

mov eax, CR0

and eax, 0FFFEFFFFh

mov CR0, eax

pop eax

}

(ULONG)PsCreateSystemThreadAddr -= 5;

memcpy((PVOID)PsCreateSystemThreadAddr, PsCreateSystemThreadData, 5);

__asm

{

push eax

mov eax, CR0

or eax, NOT 0FFFEFFFFh

mov CR0, eax

pop eax

}

DbgPrint("UnHook OK

.\n");

return;

}

//-----------------------------------------------------------------------------

// Driver UnLoad

//-----------------------------------------------------------------------------

void OnUnload(PDRIVER_OBJECT pDriverObj)

{

UnHook();

DbgPrint("UnLoading Driver");

}

//-----------------------------------------------------------------------------

// Driver LoadEntry

//-----------------------------------------------------------------------------

NTSTATUS DriverEntry(PDRIVER_OBJECT pDriverObj, PUNICODE_STRING pRegistryString)

{

pDriverObj->DriverUnload = OnUnload;

DbgPrint("Loading Driver");

ProcessNameOffset = GetPlantformDependentInfo(FILE_NAME_OFFSET);

InHook();

return STATUS_SUCCESS;

}

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[转] hook PsCreateSystemThread

hook PsCreateSystemThread

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