RE: Router Worm?

From: David Gillett (
Date: 11/20/03

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    To: "'Jose Nazario'" <>, "'Jay D. Dyson'" <>
    Date: Thu, 20 Nov 2003 09:14:10 -0800

      I've never seen it do that, in the about 50 or so instances
    I've encountered. Does it only do it occasionally? Does it
    attack the same host against which 135/tcp failed, or some
    random third party?
      (Does it, perhaps, distinguish between 135/tcp "failed to
    connect" and 135/tcp "connected, but target was patched and
    so could not be infected"?)

    David Gillett

    > -----Original Message-----
    > From: Jose Nazario []
    > Sent: November 19, 2003 17:06
    > To: Jay D. Dyson
    > Cc: Bugtraq
    > Subject: Re: Router Worm?
    > its welchia/nachi. when it can't connect via 135/tcp, it will
    > attempt an
    > exploit against a webdav server (see MS03-007).
    > i've seen an uptick in this in the past couple of days, too,
    > visible on a
    > few httpd servers i track. and i, too, was caught off guard
    > until someone
    > pointed out it was nachi to me. digging into the tech details
    > showed that
    > i (and many of us) had been overlooking a secondary attack.
    > ___________________________
    > jose nazario, ph.d.

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