宏病毒提取姿势

    'VBE decoder
    '
    'Decode all files encoded (original version) with screnc.exe
    'This script give you a decoded listing from an encoded file.
    'Supports *,je, ,vbe, .asp, .hta, .htm, .html…
    'If used under cscript, puts the result to stdout.
    'The file can be multi-encoded (many scripts in the file, for ex. in an html file)
    'Used under wscript, pops up the decoded file in a message box.
    '
    'File Name : decovbe.vbs
    'Requirement : none
    'Author : Jean-Luc Antoine
    'Submitted : 05/09/2001
    'Updated : 09/12/2001
    'Category : 4K
    '
    'http://www.interclasse.com/scripts/decovbe.php

    option explicit
    Dim oArgs, NomFichier
    'Optional argument : the encoded filename
    NomFichier=""
    Set oArgs = WScript.Arguments
    Select Case oArgs.Count
    Case 0 'No Arg, popup a dialog box to choose the file
        NomFichier=BrowseForFolder("Choose an encoded file", &H4031, &H0011)
    Case 1
        If Instr(oArgs(0),"?")=0 Then '-? ou /? => aide
            NomFichier=oArgs(0)
        End If
    Case Else
        WScript.Echo "Too many parameters"
    End Select
    Set oArgs = Nothing

    If NomFichier<>"" Then
        Dim fso
        Set fso=WScript.CreateObject("Scripting.FileSystemObject")
        If fso.FileExists(NomFichier) Then
            Dim fic,contenu
            Set fic = fso.OpenTextFile(NomFichier, 1)
            Contenu=fic.readAll
            fic.close
            Set fic=Nothing

            Const TagInit="#@~^" '#@~^awQAAA==
            Const TagFin="==^#~@" '& chr(0)
            Dim DebutCode, FinCode
            Do
                FinCode=0
                DebutCode=Instr(Contenu,TagInit)
                If DebutCode>0 Then
                    If (Instr(DebutCode,Contenu,"==")-DebutCode)=10 Then 'If "==" follows the tag
                        FinCode=Instr(DebutCode,Contenu,TagFin)
                        If FinCode>0 Then
                            Contenu=Left(Contenu,DebutCode-1) & _
                            Decode(Mid(Contenu,DebutCode+12,FinCode-DebutCode-12-6)) & _
                            Mid(Contenu,FinCode+6)
                        End If
                    End If
                End If
            Loop Until FinCode=0
            WScript.Echo Contenu
        Else
            WScript.Echo Nomfichier & " not found"
        End If
        Set fso=Nothing
    Else
        WScript.Echo "Please give a filename"
        WScript.Echo "Usage : " & wscript.fullname  & " " & WScript.ScriptFullName & " <filename>"
    End If

    Function Decode(Chaine)
        Dim se,i,c,j,index,ChaineTemp
        Dim tDecode(127)
        Const Combinaison="1231232332321323132311233213233211323231311231321323112331123132"

        Set se=WSCript.CreateObject("Scripting.Encoder")
        For i=9 to 127
            tDecode(i)="JLA"
        Next
        For i=9 to 127
            ChaineTemp=Mid(se.EncodeScriptFile(".vbs",string(3,i),0,""),13,3)
            For j=1 to 3
                c=Asc(Mid(ChaineTemp,j,1))
                tDecode(c)=Left(tDecode(c),j-1) & chr(i) & Mid(tDecode(c),j+1)
            Next
        Next
        'Next line we correct a bug, otherwise a ")" could be decoded to a ">"
        tDecode(42)=Left(tDecode(42),1) & ")" & Right(tDecode(42),1)
        Set se=Nothing

        Chaine=Replace(Replace(Chaine,"@&",chr(10)),"@#",chr(13))
        Chaine=Replace(Replace(Chaine,"@*",">"),"@!","<")
        Chaine=Replace(Chaine,"@$","@")
        index=-1
        For i=1 to Len(Chaine)
            c=asc(Mid(Chaine,i,1))
            If c<128 Then index=index+1
            If (c=9) or ((c>31) and (c<128)) Then
                If (c<>60) and (c<>62) and (c<>64) Then
                    Chaine=Left(Chaine,i-1) & Mid(tDecode(c),Mid(Combinaison,(index mod 64)+1,1),1) & Mid(Chaine,i+1)
                End If
            End If
        Next
        Decode=Chaine
    End Function

    Function BrowseForFolder(ByVal pstrPrompt, ByVal pintBrowseType, ByVal pintLocation)
        Dim ShellObject, pstrTempFolder, x
        Set ShellObject=WScript.CreateObject("Shell.Application")
        On Error Resume Next
        Set pstrTempFolder=ShellObject.BrowseForFolder(&H0,pstrPrompt,pintBrowseType,pintLocation)
        BrowseForFolder=pstrTempFolder.ParentFolder.ParseName(pstrTempFolder.Title).Path
        If Err.Number<>0 Then BrowseForFolder=""
        Set pstrTempFolder=Nothing
        Set ShellObject=Nothing
    End Function