鬼仔's Blog

作者：MJ0011

NTFS有HARDLINK~ 注册表也有个REG_LINK类型
顾名思义，就是可以把一个真实存在的注册表映射成一个symbolic link类似的注册表~

实 际过程是使用ZwCreateKey创建一个REG_OPTION_CREATE_LINK的注册表键，然后给其设置SymbolicLinkValue 键值，DATA即是要创建连接的注册表名，然后就能自动link上了，操作被LINK的注册表项同操作原注册表项实质上一样，系统的SAM ControlSet等映射都是通过这个实现的~

原理说了.下[面附上创建注册表Services键到注册表System\123的LINK的代码，能干什么就不用我说了吧~~

HMODULE hlib = LoadLibrary("ntdll.dll");
PVOID p = GetProcAddress(hlib , "RtlInitUnicodeString");
PVOID p2 = GetProcAddress(hlib , "ZwCreateKey");
PVOID p3 = GetProcAddress(hlib , "ZwSetValueKey");
WCHAR KeyName1[] = L"\\Registry\\Machine\\System\\123";
LPCWSTR pKeyName1 = KeyName1 ;
UNICODE_STRING KeyString ;
OBJECT_ATTRIBUTES oba ;

__asm
{
push pKeyName1
lea eax , KeyString
push eax
call p
}

InitializeObjectAttributes(&oba , &KeyString , 0X40 , 0 ,0 );

ULONG dispostion ;
HANDLE linkhandle ;
LONG stat ;

__asm{
lea eax , dispostion
push eax

push 3

push 0

push 0

lea eax , oba

push eax

push 0x22

lea eax , linkhandle

push eax

call p2

mov stat ,eax
}

CHAR xxx[100];

sprintf(xxx , "create stat = %08x\n" , stat);
MessageBox(xxx , 0 , 0 );

WCHAR KeyName2[] = L"\\Registry\\Machine\\System\\CurrentControlSet\\Services";
PVOID pdata = KeyName2 ;
ULONG len = wcslen(KeyName2) * sizeof(WCHAR);
WCHAR ValueName[]= L"SymbolicLinkValue";
LPCWSTR pvaluename = ValueName ;
UNICODE_STRING valuestring ;

__asm
{
push pvaluename
lea eax , valuestring
push eax
call p
}
__asm{
push len
push pdata
push 6
push 0
lea eax , valuestring
push eax

push linkhandle
call p3
mov stat ,eax
}
sprintf(xxx , "setvalue stat = %08x\n" , stat);
MessageBox(xxx , 0 , 0 );