Re: kornet.net abuse desk is mailing out W32.Nimda.E@mm worm

["Steven M. Bellovin" <smb () research att com>]

In message <195358945566.20011030133637 () conti nu>, Kai Schlichting writes:
> If you or your staff have dealt with kornet.net (a Korean ISP belonging
> to Korean Telecom), and specifically abuse () kornet net in the past, beware:
> It seems that they've been overrun by the brand-spanking-new W32.Nimda.E@mm
> worm (**) sometimes late last night.
>
> Specific case in hand: yesterday at 9:40pm EST, I received a mail
> with a  Subject: line of an UNRELATED abuse issue (hello MFNX/XO/
> Above.net :) that contains a MIME attachment with an auto-playing
> "sound file" of sample.exe , openened in an <iframe> of your favorite
> Microsoft email client. Source IP of the mailing : 210.222.17.36 (/24).

Note, however, that the From: line on these Nimda variants is also 
forged; see http://securityresponse.symantec.com/avcenter/venc/data/w32.nimda.a () mm html
for details.  (I received several messages saying that some mail I sent 
was infected with Nimda.E.  This struck me as quite improbable, since I 
use NetBSD for all my email and other real work.)

                --Steve Bellovin, http://www.research.att.com/~smb
                Full text of "Firewalls" book now at http://www.wilyhacker.com