.ida Intrusion Attempt

Russell Fulton r.fulton at auckland.ac.nz
Fri Jul 20 00:45:02 GMT 2001

On Thu, 19 Jul 2001 10:55:10 -0700 (PDT) Joe Smith 
<shadowm4n at yahoo.com> wrote:

> Interesting.  I played around with the rules some, and
> figured out why snort wasn't finding it with the .ida
> rule.  Since I'm only logging the first 100 bytes of
> data, the .ida rule misses it because part of the
> criteria of the rule is for data size to be greater
> than 239 bytes.

Ahh... that explains that!  my snort was seeing some '.ida?' probes 
*but* none of the machines that got hit by the red code worm were 

The external addresses that were detected by snort appear to be probing 
random addresses on port 80 -- just like the red worm does.

Are there two versions out there?

Russell Fulton, Computer and Network Security Officer
The University of Auckland,  New Zealand

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