有没有办法破解 Excel VBA 项目的密码? [英] Is there a way to crack the password on an Excel VBA Project?

问题描述

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.

I've been asked to update some Excel 2003 macros, but the VBA projects are password protected, and it seems there's a lack of documentation... no-one knows the passwords.

有没有办法删除或破解 VBA 项目的密码?

Is there a way of removing or cracking the password on a VBA project?

推荐答案

您可以尝试这种不需要 HEX 编辑的直接 VBA 方法.它适用于任何文件(*.xls、*.xlsm、*.xlam ...).

You can try this direct VBA approach which doesn't require HEX editing. It will work for any files (*.xls, *.xlsm, *.xlam ...).

经过测试并适用于:

Excel 2007
Excel 2010
Excel 2013 - 32 位版本
Excel 2016 - 32 位版本

正在寻找 64 位版本?请参阅此答案

Looking for 64 bit version? See this answer

我会尽力解释它是如何工作的 - 请原谅我的英语.

I will try my best to explain how it works - please excuse my English.

1. VBE 将调用一个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"，则此函数返回 1.如果用户输入错误的密码或单击取消"，则此函数返回 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，该函数在调用时将始终返回 1.

使用代码

请先备份您的文件！

1. 打开包含您锁定的 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

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

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

回到您的 VBA 项目并享受.

Come back to your VBA Projects and enjoy.

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