Security Incidents mailing list archives

Re: nimda tries to send mail after reboot


From: Brett Glass <brett () lariat org>
Date: Tue, 18 Sep 2001 16:40:08 -0600

We have a filter on our e-mail server; it's designed to catch
attachments with (among other things) the name "readme.exe".
(We actually had this in place before Nimda/Code Rainbow
began to run rampant; another worm sends an attachment with
the same name.)

So far, we haven't caught a single Code Rainbow/Nimda e-mail.
This is odd, because we are constantly receiving (and blocking)
other e-mail worms.

Has anyone received Nimda/Code Rainbow in the mail? Is it possible 
that the worm's e-mailing code is broken? (I sure hope so.)

--Brett

At 01:32 PM 9/18/2001, John Q. Public wrote:
  
here I go replying to myself again...

we cannot get it to send mail to a dummy host we have built.  It connects
and sits there.  if nimda is waiting for a particular response, it's not
obvious in the strings of the binary.  (and not obvious to someone who
fears assembly)


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