Snort mailing list archives

Re: Nimda in action


From: "Travis Farmer" <travis5765 () hotmail com>
Date: Wed, 19 Sep 2001 12:12:03 -0400

Ahh, now i see why my replies where not getting to the group.
The TO was sending my reply directly to Franki (sorry for filling your inbox).

Anyway, I thought i may have been infected but now i'm not sure.
When i went to the page, it autoloaded readme.eml .
Strangely though, it tried to "play" it with windows media player that responded with invalid media file. I can only assume it stopped proccess of the file at that point.

To be on the safe side though, i have checked and re-checked my system to compair it to the system changes noted in the symantec report.
I don't seem to match any of them. At this moment anyway.

I have a copy of the worm stored on a Linux system in case any of you want a copy for study. It was found in my internet temp folder.


A look at the file with Pico (text editor packaged with Pine) showes it really is a email file (windows saves emails as *.eml).
the top of the file is as such;
-----------------------
MIME-Version: 1.0
Content-Type: multipart/related;
        type="multipart/alternative";
        boundary="====_ABC1234567890DEF_===="
X-Priority: 3
X-MSMail-Priority: Normal
X-Unsent: 1
--====_ABC1234567890DEF_====
Content-Type: multipart/alternative;
        boundary="====_ABC0987654321DEF_===="
--====_ABC0987654321DEF_====
Content-Type: text/html;
        charset="iso-8859-1"
Content-Transfer-Encoding: quoted-printable
<HTML><HEAD></HEAD><BODY bgColor=3D#ffffff>
<iframe src=3Dcid:EA4DMGBP9p height=3D0 width=3D0>
</iframe></BODY></HTML>
--====_ABC0987654321DEF_====--
--====_ABC1234567890DEF_====
Content-Type: audio/x-wav;
        name="readme.exe"
Content-Transfer-Encoding: base64
Content-ID: <EA4DMGBP9p>

<snip good old base64 encoded worm>

--====_ABC1234567890DEF_====

-----------------------

Header stuff was preceeded with a ">" because the snort-users mail server thought the text was an actual attachment header. Needless to say, i got a message back from the server.

~Travis

From: "Franki" <frankieh () vianet net au>
Reply-To: <frankieh () vianet net au>
To: <snort-users () lists sourceforge net>
Subject: [Snort-users] Nimda in action
Date: Wed, 19 Sep 2001 19:39:43 +0800
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if anyone wants to see nimda in action (and you haven't already.)

try going to this site..

http://203-236-233-27.rev.nextel.co.kr/

whatever you do, don't run the readme.exe file....(assuming you are on
windows..)

rgds

Frank


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