如果该文件是一个有效的zip文件(前几个字节是504b——用于.xlsm等格式)，那么解压缩该文件并查找子文件xl/vbaProject.bin。这是一个CFB文件，就像.xls文件一样。按照XLS格式的说明(应用于子文件)，然后压缩内容。

对于XLS格式，您可以使用本文中的其他一些方法。我个人更喜欢搜索DPB=块并替换文本

CMG="..."
DPB="..."
GC="..."

有空格。这样就避免了CFB容器大小的问题。

您的excel文件扩展名更改为xml。 然后用记事本打开。 密码文本在XML文件中找到。

你看下面这条线;

Sheets("Sheet1").Unprotect Password:="blabla"

(抱歉我的英语不好)

万一你的街区 没有发生= \ r \ nDPB“XXXX”=“XXXXX”\ r \ nGC =“XXXXXX” 如果您的“已知密码”文件比“未知密码”文件中的现有块短，请用后面的零填充十六进制字符串以达到正确的长度。

e.g.

CMG=“xxxxxx”\r\nDPB=“xxxxx”\r\nGC=“xxxxx”

在未知密码文件中，应设置为

CMG="XXXX00"\r\nDPB="XXXXX000"\r\nGC="XXXXXX0000"保留文件长度。

我在office 2007中也使用过。xla(97/2003格式)文件。

对于.xlsm或.dotm文件类型，您需要以稍微不同的方式进行操作。

Change the extension of the .xlsm file to .zip. Open the .zip file (with WinZip or WinRar etc) and go to the xl folder. Extract the vbaProject.bin file and open it in a Hex Editor (I use HxD, its completely free and lightweight.) Search for DPB and replace with DPx and save the file. Replace the old vbaProject.bin file with this new on in the zipped file. Change the file extension back to .xlsm. Open workbook skip through the warning messages. Open up Visual Basic inside Excel. Go to Tools > VBAProject Properties > Protection Tab. Put in a new password and save the .xlsm file. Close and re open and your new password will work.

Colin Pickard has an excellent answer, but there is one 'watch out' with this. There are instances (I haven't figured out the cause yet) where the total length of the "CMG=........GC=...." entry in the file is different from one excel file to the next. In some cases, this entry will be 137 bytes, and in others it will be 143 bytes. The 137 byte length is the odd one, and if this happens when you create your file with the '1234' password, just create another file, and it should jump to the 143 byte length.

如果您尝试将错误的字节数粘贴到文件中，当您尝试用Excel打开该文件时，您将丢失VBA项目。

EDIT

这对Excel 2007/2010文件无效。标准的。xlsx文件格式实际上是一个。zip文件，包含许多子文件夹，其中格式、布局、内容等存储为xml数据。对于未受保护的Excel 2007文件，只需将.xlsx扩展名更改为.zip，然后打开zip文件并查看所有xml数据。这很简单。

但是，当您对Excel 2007文件进行密码保护时，整个.zip (.xlsx)文件实际上是使用RSA加密进行加密的。不再可以将扩展名更改为.zip并浏览文件内容。

我尝试了上面的一些解决方案，但没有一个适合我(excel 2007 xlsm文件)。然后我找到了另一个解决方案，甚至检索密码，而不仅仅是破解它。

将此代码插入模块，运行它并给它一些时间。它将恢复您的密码的蛮力。

Sub PasswordBreaker()

'Breaks worksheet password protection.

Dim i As Integer, j As Integer, k As Integer
Dim l As Integer, m As Integer, n As Integer
Dim i1 As Integer, i2 As Integer, i3 As Integer
Dim i4 As Integer, i5 As Integer, i6 As Integer
On Error Resume Next
For i = 65 To 66: For j = 65 To 66: For k = 65 To 66
For l = 65 To 66: For m = 65 To 66: For i1 = 65 To 66
For i2 = 65 To 66: For i3 = 65 To 66: For i4 = 65 To 66
For i5 = 65 To 66: For i6 = 65 To 66: For n = 32 To 126
ActiveSheet.Unprotect Chr(i) & Chr(j) & Chr(k) & _
Chr(l) & Chr(m) & Chr(i1) & Chr(i2) & Chr(i3) & _
Chr(i4) & Chr(i5) & Chr(i6) & Chr(n)
If ActiveSheet.ProtectContents = False Then
MsgBox "One usable password is " & Chr(i) & Chr(j) & _
Chr(k) & Chr(l) & Chr(m) & Chr(i1) & Chr(i2) & _
Chr(i3) & Chr(i4) & Chr(i5) & Chr(i6) & Chr(n)
Exit Sub
End If
Next: Next: Next: Next: Next: Next
Next: Next: Next: Next: Next: Next
End Sub