excel - 有没有办法破解 Excel VBA 项目的密码？

Question

我被要求更新一些 Excel 2003 宏，但 VBA 项目受密码保护，而且似乎缺少文档...没有人知道密码。

有没有办法删除或破解 VBA 项目上的密码？

Answer 1

您可以尝试这种直接的 VBA 方法，它不需要十六进制编辑。它适用于任何文件(*.xls、*.xlsm、*.xlam ...)。

已测试并适用于:

Excel 2007
Excel 2010
Excel 2013 - 32 bit version
Excel 2016 - 32 bit version

正在寻找 64 位版本？请参阅this answer

它是如何工作的

我会尽力解释它是如何工作的 - 请原谅我的英语。

1. VBE 将调用系统函数来创建密码对话框。
2. 如果用户输入正确的密码并单击“确定”，此函数返回 1。如果用户输入错误的密码或单击“取消”，此函数返回 0。
3. 对话框关闭后，VBE检查系统函数的返回值
4. 如果该值为 1，VBE 将“认为”密码正确，因此将打开锁定的 VBA 项目。
5. 下面的代码将用于显示密码对话框的原始函数的内存与用户定义的函数交换，该函数在调用时始终返回 1。

使用代码

请先备份您的文件!

1. 打开包含锁定的 VBA 项目的文件

2. 创建一个新的 xlsm 文件并将此代码存储在 Module1 中

   代码归功于越南开发者 Siwtom(昵称)

   Option Explicit
   
   Private Const PAGE_EXECUTE_READWRITE = &H40
   
   Private Declare Sub MoveMemory Lib "kernel32" Alias "RtlMoveMemory" _
           (Destination As Long, Source As Long, ByVal Length As Long)
   
   Private Declare Function VirtualProtect Lib "kernel32" (lpAddress As Long, _
           ByVal dwSize As Long, ByVal flNewProtect As Long, lpflOldProtect As Long) As Long
   
   Private Declare Function GetModuleHandleA Lib "kernel32" (ByVal lpModuleName As String) As Long
   
   Private Declare Function GetProcAddress Lib "kernel32" (ByVal hModule As Long, _
           ByVal lpProcName As String) As Long
   
   Private Declare Function DialogBoxParam Lib "user32" Alias "DialogBoxParamA" (ByVal hInstance As Long, _
           ByVal pTemplateName As Long, ByVal hWndParent As Long, _
           ByVal lpDialogFunc As Long, ByVal dwInitParam As Long) As Integer
   
   Dim HookBytes(0 To 5) As Byte
   Dim OriginBytes(0 To 5) As Byte
   Dim pFunc As Long
   Dim Flag As Boolean
   
   Private Function GetPtr(ByVal Value As Long) As Long
       GetPtr = Value
   End Function
   
   Public Sub RecoverBytes()
       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 Long
       Dim OriginProtect As Long
   
       Hook = False
   
       pFunc = GetProcAddress(GetModuleHandleA("user32.dll"), "DialogBoxParamA")
   
   
       If VirtualProtect(ByVal pFunc, 6, PAGE_EXECUTE_READWRITE, OriginProtect) <> 0 Then
   
           MoveMemory ByVal VarPtr(TmpBytes(0)), ByVal pFunc, 6
           If TmpBytes(0) <> &H68 Then
   
               MoveMemory ByVal VarPtr(OriginBytes(0)), ByVal pFunc, 6
   
               p = GetPtr(AddressOf MyDialogBoxParam)
   
               HookBytes(0) = &H68
               MoveMemory ByVal VarPtr(HookBytes(1)), ByVal VarPtr(p), 4
               HookBytes(5) = &HC3
   
               MoveMemory ByVal pFunc, ByVal VarPtr(HookBytes(0)), 6
               Flag = True
               Hook = True
           End If
       End If
   End Function
   
   Private Function MyDialogBoxParam(ByVal hInstance As Long, _
           ByVal pTemplateName As Long, ByVal hWndParent As Long, _
           ByVal lpDialogFunc As Long, ByVal dwInitParam As Long) As Integer
       If pTemplateName = 4070 Then
           MyDialogBoxParam = 1
       Else
           RecoverBytes
           MyDialogBoxParam = DialogBoxParam(hInstance, pTemplateName, _
                              hWndParent, lpDialogFunc, dwInitParam)
           Hook
       End If
   End Function
   

3. 将此代码粘贴到Module1中的上述代码下并运行

   Sub unprotected()
       If Hook Then
           MsgBox "VBA Project is unprotected!", vbInformation, "*****"
       End If
   End Sub
   

4. 返回您的 VBA 项目并尽情享受。