Muốn phá pass của sheet nào bạn chuột phải vào tên của sheet đó chọn view code một bảng hiện ra bạn copy đoạn mã sau và paste vào đó sau đó vào RUN -> Run sub/userForm hoặc nhấn F5 đợi 1 lúc là được.

Sub PasswordBreaker()
If ActiveSheet.ProtectContents = False Then
    MsgBox "Sheet '" & ActiveSheet.Name & "' is unprotected!", vbInformation
Else
    If MsgBox("Sheet '" & ActiveSheet.Name & "' is protected, do you want to unprotect it?", _
    vbYesNo + vbQuestion, "Unprotect Active Sheet") = vbNo Then Exit Sub
    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)
    Next: Next: Next: Next: Next: Next
    Next: Next: Next: Next: Next: Next
    If ActiveSheet.ProtectContents = False Then MsgBox "Sheet '" & ActiveSheet.Name & "' is unprotected!", vbInformation
End If
End Sub