Cracking Password of VBA Project

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

Tested and works on

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

How it will work

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

1. Excel will call a system function to create the password dialog box.
2. 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.
3. After the dialog box is closed, Excel checks the returned value of the system function
4. if this value is 1, Excel will "think" that the password is right, hence the locked VBA project will be opened.
5. 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.

using the code

1. Open the file(s) that contain your locked VBA Projects
2. Create a new xlsm file and store this code in Module1

'---------------------------------------------

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. Paste this code in Module2 and run it

'---------------------------------------------

Sub unprotected()

    If Hook Then

        MsgBox "VBA Project is unprotected!", vbInformation, "*****"

    End If

End Sub

'---------------------------------------------

4. Come back to your VBA Projects and enjoy

by Siwtom (nick name), a Vietnamese developer