Penetration Testing: RE: analysing captured packets

["Dean De Beer" <ddb () plazacollege edu>]

Hi Robin,

You had mentioned using Ethereal. You might want to have a look at their
Filter Reference page. It gives really detailed breakdowns on each filter.
http://www.ethereal.com/docs/dfref/

For example:
http://www.ethereal.com/docs/dfref/e/eapol.html - 802.1x Authentication
traffic.

HTH,

Dean

-----Original Message-----
From: Robin Wood [mailto:dninja () gmail com] 
Sent: Tuesday, April 04, 2006 11:05 AM
To: Dan Goldberg
Cc: pagvac; pen-test () securityfocus com
Subject: Re: analysing captured packets


Thanks all.

I'm going to have a look through these as they should give me a good base.
The reason I want to learn about this is I'm getting into wireless
pen-testing and so will need to analyse the data I capture during tests. So
I'm not actually looking for analysys of attacks, more higher level captured
data, things like re-building emails, watching windows domain logins that
kind of thing.

Obviously, the same high level data flows over wireless as over wired so
techniques for either would help.

I should have been more specific when I posted my original question.

On 4/4/06, Dan Goldberg <dan () madjic net> wrote:
> This is a good place to start learning about "what to look for": 
> http://www.packet-level.com/productsServ.htm#labkit
> (I am not affiliated - nor have I been to the training)
>
> Of course the SANS Institutes Intrusion Detection course is a great 
> place to develop hands on experience with analysis and the mastering 
> packet analysis course form SANS to. (I am loosely affiliated with the 
> SANS institute but do not gain personally from these activities)
>
> Dan
>
> pagvac wrote:
> > I know that what I'm gonna say may sound silly, but what I recommend 
> > you is simply to play with analyzing traffic A LOT. Just watch the 
> > packets, filter them by protocol, IP address, or whatever you're 
> > interested in (Ethereal is great for filters). Try to follow 
> > different protocol "conversations" and try to understand what the 
> > requests and responses mean.
> >
> > Good luck on your sniffing experience my friend :-)
> >
> > Robin Wood wrote:
> >
> > > > Hi Can anyone give any pointers to good tutorials on how to go 
> > > > about analysing network traffic captured during a pen-test.
> > > >
> > > > I'm currently using ethereal but I'm not necessarily looking for an  
> > > > ethereal tutorial more a howto on what to look for in capture 
> > > > files. Things like good protocols to spot (e.g. ftp logs in in 
> > > > plaintext so you can grab login details), how to recognise what is 
> > > > going on by watching the high level handshakes (e.g. a http get is 
> > > > usually followed by a response containing html), things like that.
> > > >
> > > > Thanks
> > > >
> > > > Robin
> > > >
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