Try something like this.
Option Explicit
Sub Macro1()
Dim Wkb As Workbook
Dim Path As String
Dim FName As String
Dim Pass As String
Dim Str As String
Dim LastRow As Long
Path = ThisWorkbook.Path
FName = "A.xls"
Pass = "ABC"
Set Wkb = Workbooks.Open(Filename:=Path & "\" & FName, Password:=Pass)
LastRow = Wkb.Sheets(1).Range("A65536").End(xlUp).Row
Wkb.Sheets(1).Range("A" & LastRow).Value = Wkb.Sheets(1).Range("A" & LastRow).Value + 1
Wkb.Sheets(1).Range("A" & lastrow).Copy Destination:= ??Paste Location Here??
ThisWorkbook.Sheets(i).Range("A2").EntireRow.Copy Destination:=Wkb.Sheets(1).Range("A" & LastRow + 1)
Wkb.Close SaveChanges:=True
End Sub