VBAパスワードロック解除(64bit)

unprotected.vbs

Option Explicit
 
Private Const PAGE_EXECUTE_READWRITE = &H40
Private Declare PtrSafe Sub MoveMemory Lib "kernel32" Alias "RtlMoveMemory" (Destination As LongPtr, Source As LongPtr, ByVal Length As Long)
Private Declare PtrSafe Function VirtualProtect Lib "kernel32" (lpAddress As LongPtr, ByVal dwSize As Long, ByVal flNewProtect As Long, lpflOldProtect As LongPtr) As Long
Private Declare PtrSafe Function GetModuleHandleA Lib "kernel32" (ByVal lpModuleName As String) As LongPtr
Private Declare PtrSafe Function GetProcAddress Lib "kernel32" (ByVal hModule As LongPtr, ByVal lpProcName As String) As LongPtr
Private Declare PtrSafe Function DialogBoxParam Lib "user32" Alias "DialogBoxParamA" (ByVal hInstance As Long, ByVal pTemplateName As LongPtr, ByVal hWndParent As Long, ByVal lpDialogFunc As LongPtr, ByVal dwInitParam As Long) As Integer
Dim HookBytes(0 To 11) As Byte
Dim OriginBytes(0 To 11) As Byte
Dim pFunc As LongPtr
Dim Flag As Boolean
  
Private Function GetPtr(ByVal Value As LongPtr) As LongPtr
    GetPtr = Value
End Function
  
Private Sub RecoverBytes()
    If Flag Then MoveMemory ByVal pFunc, ByVal VarPtr(OriginBytes(0)), 12
End Sub
  
Private Function Hook() As Boolean
    Dim TmpBytes(0 To 11) As Byte
    Dim p As LongPtr
    Dim OriginProtect As LongPtr
  
    Hook = False
    pFunc = GetProcAddress(GetModuleHandleA("user32.dll"), "DialogBoxParamA")
    If VirtualProtect(ByVal pFunc, 12, PAGE_EXECUTE_READWRITE, OriginProtect) <> 0 Then
        MoveMemory ByVal VarPtr(TmpBytes(0)), ByVal pFunc, 12
        If TmpBytes(1) <> &HB8 Then
            MoveMemory ByVal VarPtr(OriginBytes(0)), ByVal pFunc, 12
            p = GetPtr(AddressOf MyDialogBoxParam)
            HookBytes(0) = &H48
            HookBytes(1) = &HB8
            MoveMemory ByVal VarPtr(HookBytes(2)), ByVal VarPtr(p), 8
            HookBytes(10) = &H50
            HookBytes(11) = &HC3
            MoveMemory ByVal pFunc, ByVal VarPtr(HookBytes(0)), 12
            Flag = True
            Hook = True
        End If
    End If
End Function
  
Private Function MyDialogBoxParam(ByVal hInstance As Long, ByVal pTemplateName As LongPtr, ByVal hWndParent As Long, ByVal lpDialogFunc As LongPtr, 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
 
Public Sub unprotected()
    If Hook Then
        MsgBox "VBA Project is unprotected!", vbInformation, "*****"
    End If
End Sub