在Office 2013(64bit)下破解VBA工程密码

今天客户要求分析一个VBA为何不能执行，但是VBA工程加了密码，为了看到整个工程，不得已将许久以前用过的破解代码拿了出来，发现在Office2013(64bit)下不能用。

分析原因，主要是有两个，一个是在使用API的生命语句的Declare后面要加PtrSate。另外一个是很多Long型变量要替换成LongLong变量。

修改后的代码如下。

Option Explicit
Private Declare PtrSafe Sub MoveMemory Lib "kernel32" Alias "RtlMoveMemory" _
        (Destination As LongLong, Source As LongLong, ByVal Length As LongLong)
Private Declare PtrSafe Function VirtualProtect Lib "kernel32" (lpAddress As LongLong, _
        ByVal dwSize As LongLong, ByVal flNewProtect As LongLong, lpflOldProtect As LongLong) As LongLong

Private Declare PtrSafe Function GetModuleHandleA Lib "kernel32" (ByVal lpModuleName As String) As LongLong

Private Declare PtrSafe Function GetProcAddress Lib "kernel32" (ByVal hModule As LongLong, _
        ByVal lpProcName As String) As LongLong

Private Declare PtrSafe Function DialogBoxParam Lib "user32" Alias "DialogBoxParamA" (ByVal hInstance As LongLong, _
        ByVal pTemplateName As LongLong, ByVal hWndParent As LongLong, _
        ByVal lpDialogFunc As LongLong, ByVal dwInitParam As LongLong) As Integer

Dim HookBytes(0 To 5) As Byte
Dim OriginBytes(0 To 5) As Byte
Dim pFunc As LongLong
Dim Flag As Boolean

Private Function GetPtr(ByVal Value As LongLong) As LongLong
    '获得函数的地址
    GetPtr = Value
End Function

Public Sub RecoverBytes()
    '若已经hook,则恢复原API开头的6字节,也就是恢复原来函数的功能
    If Flag Then MoveMemory ByVal pFunc, ByVal VarPtr(OriginBytes(0)), 6
End Sub

Public Function Hook() As Boolean
    Dim TmpBytes(0 To 5) As Byte
    Dim p As LongLong
    Dim OriginProtect As LongLong

    Hook = False

    'VBE6.dll调用DialogBoxParamA显示VB6INTL.dll资源中的第4070号对话框(就是输入密码的窗口)
    '若DialogBoxParamA返回值非0,则VBE会认为密码正确,所以我们要hook DialogBoxParamA函数
    pFunc = GetProcAddress(GetModuleHandleA("user32.dll"), "DialogBoxParamA")

    '标准api hook过程之一: 修改内存属性,使其可写
    If VirtualProtect(ByVal pFunc, 6, &H40, OriginProtect) <> 0 Then
        '标准api hook过程之二: 判断是否已经hook,看看API的第一个字节是否为&H68,
        '若是则说明已经Hook
        MoveMemory ByVal VarPtr(TmpBytes(0)), ByVal pFunc, 6
        If TmpBytes(0) <> &H68 Then
            '标准api hook过程之三: 保存原函数开头字节,这里是6个字节,以备后面恢复
            MoveMemory ByVal VarPtr(OriginBytes(0)), ByVal pFunc, 6
            '用AddressOf获取MyDialogBoxParam的地址
            '因为语法不允许写成p = AddressOf MyDialogBoxParam,这里我们写一个函数
            'GetPtr,作用仅仅是返回AddressOf MyDialogBoxParam的值,从而实现将
            'MyDialogBoxParam的地址付给p的目的
            p = GetPtr(AddressOf MyDialogBoxParam)

            '标准api hook过程之四: 组装API入口的新代码
            'HookBytes 组成如下汇编
            'push MyDialogBoxParam的地址
            'ret
            '作用是跳转到MyDialogBoxParam函数
            HookBytes(0) = &H68
            MoveMemory ByVal VarPtr(HookBytes(1)), ByVal VarPtr(p), 4
            HookBytes(5) = &HC3

            '标准api hook过程之五: 用HookBytes的内容改写API前6个字节
            MoveMemory ByVal pFunc, ByVal VarPtr(HookBytes(0)), 6
            '设置hook成功标志
            Flag = True
            Hook = True
        End If
    End If
End Function

Private Function MyDialogBoxParam(ByVal hInstance As LongLong, _
        ByVal pTemplateName As LongLong, ByVal hWndParent As LongLong, _
        ByVal lpDialogFunc As LongLong, ByVal dwInitParam As LongLong) As Integer
    If pTemplateName = 4070 Then
        '有程序调用DialogBoxParamA装入4070号对话框,这里我们直接返回1,让
        'VBE以为密码正确了
        MyDialogBoxParam = 1
    Else
        '有程序调用DialogBoxParamA,但装入的不是4070号对话框,这里我们调用
        'RecoverBytes函数恢复原来函数的功能,在进行原来的函数
        RecoverBytes
        MyDialogBoxParam = DialogBoxParam(hInstance, pTemplateName, _
                           hWndParent, lpDialogFunc, dwInitParam)
        '原来的函数执行完毕,再次hook
        Hook
    End If
End Function