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硬编码问题
发表于: 2010-3-2 20:37 3649

硬编码问题

2010-3-2 20:37
3649
__declspec(naked) NTSTATUS __stdcall MyNtOpenProcess(PHANDLE ProcessHandle,
               ACCESS_MASK DesiredAccess,
               POBJECT_ATTRIBUTES ObjectAttributes,
               PCLIENT_ID ClientId)
{
  DbgPrint("NtOpenProcess() called");
  __asm{
    push    0C4h
    push    804eb0d8h  //共十个字节
    jmp     [JmpAddress]     
  }
}

如上 这个是SSDT HOOK 对抗inline hook其中的代码
我是想问 里面的

    push    0C4h
    push    804eb0d8h

有什么办法可以使得驱动程序自己获得 而不需要自己用硬编码代替?
我的系统是XP2

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最新回复 (5)
雪    币: 335
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帮你顶起,等待高人回答
2010-3-2 21:08
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雪    币: 75
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有方法,看看这个函数是哪个模块导出的,然后自己加载该模块,根据导出表找到
xxopenprocess原始代码的所在位置,读取开头的10个字节,放在你自己的函数里面

怎么放进你的函数,你可以自己申请一段内存,然后在内存里生成你的函数代码,再把这10个字节填充到相应位置
2010-3-2 22:01
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看不懂~~帮你顶起来吧
2010-3-3 10:10
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UCHAR CodeBuff[10];
	status = ZwQuerySystemInformation(SystemModuleInformation,NULL,0,&length);
	if (status == STATUS_INFO_LENGTH_MISMATCH)
	{
  		SysInfo = ExAllocatePool(NonPagedPool,length);
  		if (NULL == SysInfo)
  		{
  			return;
  		}
	}
	status = ZwQuerySystemInformation(SystemModuleInformation,SysInfo,length,&length);
	pSmi = (PSYSTEM_MODULE_INFORMATION)((char*)SysInfo+4);
	kBase = (ULONG)(pSmi->Base);
	kSize = (ULONG)(pSmi->Size);


	InitializeObjectAttributes (
		&ob,
		&pdte->FullDllName,
		OBJ_CASE_INSENSITIVE,
		NULL,
		NULL
		);
	status = ZwOpenFile(
		&hFile,
		FILE_READ_ACCESS,
		&ob,
		&IoStatusBlock,
		FILE_SHARE_READ,
		FILE_SYNCHRONOUS_IO_NONALERT
       );
	ob.ObjectName = NULL;
	status =  ZwCreateSection(
		&hSection,
		SECTION_MAP_EXECUTE,
		&ob,
		0,
		PAGE_EXECUTE,
		SEC_IMAGE,
		hFile
		);
	size = 0;
	status =  ZwMapViewOfSection(
			hSection,
			NtCurrentProcess(),
			&BaseAddress,
			0, 
			1000, 
			0, 
			&size, 
			(SECTION_INHERIT)1, 
			MEM_TOP_DOWN, 
			PAGE_READWRITE
			);
	mBase = ExAllocatePool (NonPagedPool, size);

	RtlCopyMemory (mBase, BaseAddress, size);		
		
	DosHead = (PIMAGE_DOS_HEADER)mBase;
	NtHeads = (PIMAGE_NT_HEADERS)((ULONG)DosHead + DosHead->e_lfanew);
	ExportDir = (PIMAGE_EXPORT_DIRECTORY)((PUCHAR)mBase + NtHeads->OptionalHeader.DataDirectory[0].VirtualAddress);
	RelocDir = (PIMAGE_BASE_RELOCATION)((ULONG)mBase + NtHeads->OptionalHeader.DataDirectory[5].VirtualAddress);
	Name = mBase + ExportDir->AddressOfNames;
	Ordinal = mBase + ExportDir->AddressOfNameOrdinals;
	Function = mBase + ExportDir->AddressOfFunctions;

	if (RelocDir != NULL)
	{
		while (RelocDir->VirtualAddress != 0 || RelocDir->SizeOfBlock !=  0)
		{
			FixAddrBase = RelocDir->VirtualAddress + (ULONG)mBase;
			RelocSize = (RelocDir->SizeOfBlock - 8)/2;
			for ( i = 0; i < RelocSize; i++)
			{
				Temp = *(PUSHORT)((ULONG)RelocDir + sizeof (IMAGE_BASE_RELOCATION) + i * 2);
				if ( (Temp & 0xF000) == 0x3000)
				{
					Temp &= 0x0FFF;
					FixAddr = FixAddrBase + (ULONG)Temp;
					*(PULONG)FixAddr = *(PULONG)FixAddr + (ULONG)kBase - (ULONG)NtHeads->OptionalHeader.ImageBase;
				}
			}
			RelocDir = (ULONG)RelocDir + RelocDir->SizeOfBlock;
		}
	}



	for (i = 0; i < ExportDir->NumberOfNames; i++)
	{
		SystemFunName = (PCHAR)(*(PULONG)(Name + i * 4) + (ULONG)Base);
		index = *((PUSHORT)(Ordinal + i * 2));
		Address = *((PULONG)(Function + index * 4));
		if (Flag == 0)
		{
			if (!stricmp ("NtOpenProcess", SystemFunName))
			{
				break;
			}
		}
	}
  
	memcopy (CodeBuff, Address + mBase, 10);
	//到这里就获得了原始ntopenprocess函数开头10字节代码

	MyNtOpenProcessAdddress = MyNtProcessBorn (CodeBuff);

	//好了,什么都有了,ssdthook就ok了

 ULONG  MyNtProcessBorn (PUCHAR CodeBuff)
 {
	 PUCHAR Temp;
	 ULONG myntopenprocessaddress;
	 myntopenprocessaddress = ExAllocatePool (NonPagedPool, 15);
	 memcpy (myntprocessaddress, CodeBuff, 10);

	 Temp = (PUCHAR)myntprocessaddress + 10;
	 *(PUCHAR)Temp = 0xE9;
	 Temp += 1;
	 offset = (ULONG)realntopenprocessaddress - (ULONG)Temp - 4;

	 *(PULONG)Temp = offset;
	 return myntopenprocessaddress;

 }
2010-3-4 17:10
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雪    币: 75
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哦,还少了个源文件的定义,pdte->FullDllName,换成 ntopenprocess所在模块的原始文件的全路径就ok了
2010-3-4 17:16
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