事实上，大多数启用宏的Office文档的代码文件都没有加密，密码只会阻止使用Office程序打开项目。 这意味着，正如其他答案所建议的那样，您通常可以使用Office替代品来访问和编辑该文件。

但是，如果你只是需要访问代码，你可以使用oldump .py这样的工具来提取宏代码。这对于恶意软件分析非常有用，还可以从文件中获取大部分代码，这样如果忘记密码，就不必从头开始了。

此外，许多excel文件在打开时动态设置密码。这意味着如果您可以阅读代码，您通常可以找到明文密码或消除混淆。

oledump.py例子:

列出一个办公文档中的所有“流”(嵌入式二进制文件或代码文件):

python oledump.py -v yourExcelFile.xlsm

输出:

A: xl/vbaProject.bin
 A1:      2000 'PROJECT'
 A2:      1500 'PROJECTwm'
 A3: M    1224 'VBA/Module1'
 A4: M   18694 'VBA/Module2'
 A5: M   11877 'VBA/Module3'
...

旁边带M的流是宏，这是未加密的VBA代码

提取流

python oledump.py -s A3 -v yourExcelFile.xlsm > Module1.vba

这将把A3流中包含的代码输出到Module1.vba。

我通常将此与循环结合起来，将所有文件解压缩到一个文件夹中。这个快速的PowerShell脚本将提取大多数文件中的所有流:

New-Item -ItemType Directory "Output"

# just hardcode the highest stream outputted by oledump.py -v
$max = 5 
for ($i = 1; $i -le $max; $i++) {
    python oledump.py -s "A$i" -v yourExcelFile.xlsm > ".\Output\A$i"
}

注意，这将只提取人类可读的文件。

我的工具VbaDiff直接从文件中读取VBA，因此您可以使用它从大多数办公文档中恢复受保护的VBA代码，而无需求助于十六进制编辑器。

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

测试和工作:

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

寻找64位版本?请看这个答案

它是如何工作的

我会尽我最大的努力解释它是如何工作的-请原谅我的英语。

The VBE will call a system function to create the password dialog box. If user enters the right password and click OK, this function returns 1. If user enters the wrong password or click Cancel, this function returns 0. After the dialog box is closed, the VBE checks the returned value of the system function if this value is 1, the VBE will "think" that the password is right, hence the locked VBA project will be opened. The code below swaps the memory of the original function used to display the password dialog with a user defined function that will always return 1 when being called.

使用代码

请先备份您的文件!

Open the file(s) that contain your locked VBA Projects Create a new xlsm file and store this code in Module1 code credited to Siwtom (nick name), a Vietnamese developer 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 Paste this code under the above code in Module1 and run it Sub unprotected() If Hook Then MsgBox "VBA Project is unprotected!", vbInformation, "*****" End If End Sub Come back to your VBA Projects and enjoy.

是的，只要你使用的是。xls格式的电子表格(2003年以前Excel的默认格式)。对于Excel 2007以后，默认是.xlsx，这是一个相当安全的格式，这个方法将不起作用。

正如Treb所说，这是一个简单的比较。一种方法是使用十六进制编辑器(参见Windows的十六进制编辑器)简单地交换文件中的密码条目。循序渐进的例子:

Create a new simple excel file. In the VBA part, set a simple password (say - 1234). Save the file and exit. Then check the file size - see Stewbob's gotcha Open the file you just created with a hex editor. Copy the lines starting with the following keys: CMG=.... DPB=... GC=... FIRST BACKUP the excel file you don't know the VBA password for, then open it with your hex editor, and paste the above copied lines from the dummy file. Save the excel file and exit. Now, open the excel file you need to see the VBA code in. The password for the VBA code will simply be 1234 (as in the example I'm showing here).

如果你需要使用Excel 2007或2010，下面有一些其他的答案可能会有帮助，特别是这些:1、2、3。

编辑2015年2月:另一种看起来很有前途的方法，看看Đức Thanh nguy的新答案。

如果你使用Java，你可以尝试VBAMacroExtractor。在从.xlsm中提取VBA脚本后，我发现了明文密码。

保护是Excel中的一个简单的文本比较。 在你最喜欢的调试器中加载Excel (Ollydbg是我选择的工具)，找到进行比较的代码并将其修复为总是返回true，这应该可以让你访问宏。