Re: Need help to find web server attacks signature

["Maxime Ducharme" <maxime () pandore-design com>]

More weird stuff beginning, we see some HTTP GETs which
contains these information :

Accept: */*
Host: website.domain.com
User-Agent: Mozilla/4.0 (compatible; MSIE 5.0; Windows 98; DigExt)
-------: ----:----------------------
----------: -----



We got this via tcpdump

There is no other HTTP information.

2 headers are "hidden" and replaced with "-" char.

It looks like a bot (GET many times on many pages) and the
source is in this block :
81.62.0.0 - 81.62.255.255
BLUEWINNET
which is not the same as the one used for our attack yesterday.

Any thoughts on these "hidden" HTTP headers ?

Thanks again

---------------------------------------------------------------
  Maxime Ducharme
  Administrateur reseau, Programmeur
  E-Mail : maxime () pandore-design com
  Clé publique PGP : http://pandore-design.com/pgp/maxime.asc
  Pandore-Design [http://www.pandore-design.com]
  Tel : (866) 961-9321
  Fax : (866) 961-9943


----- Original Message ----- 
From: "Maxime Ducharme" <maxime () pandore-design com>
To: <full-disclosure () lists netsys com>
Sent: Wednesday, October 22, 2003 1:40 PM
Subject: Need help to find web server attacks signature


> Hi all,
>     i'd need help to identify an attack that happened on one of our
> customer's web server yesterday, I put the log file here :
> http://www.pandore-design.com/security/2003-10-21-IIS-attack.txt
>
> I see some attacks that seem to be a security scanner tool,
> and some attacks which targets specific pages of the web site
> (where we begin to see 200 responses from the web server).
>
> Someone recognize a tool / virus / worm in this ?
>
> Thanks in advance for help
>
> ---------------------------------------------------------------
>   Maxime Ducharme
>   Administrateur reseau, Programmeur


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