This script behaves like a virus
This script shows you how a script can be self modifying, like viruses.
It is a warning about the possibilities of macro viruses.

File Name : selfmodify.vbs
Requirement : none
Author : Jean-Luc Antoine
Submitted : 01/09/2001
Category : Other

Const n = 1 
Dim f, a, s, w 
w = WScript.ScriptFullName 
Set f = CreateObject("Scripting.FileSystemObject") 
Set a = f.OpenTextFile(w, 1) 
a.SkipLine 
s = chr(13) & Chr(10) & a.ReadAll 
a.Close 

Set a = f.CreateTextFile(w, True) 
a.Write "Const n = " & n + 1 & s 
a.Close 

WScript.echo "This script has been run " & n & " times" 

原理就是每次运行脚本自身的代码就会被修改Const n = 1，这个1是一直变化的。

原文：http://www.interclasse.com/scripts/selfmodify.php

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