RE: project

Once he's reassembled the streams, the rest should be a bit more obvious. If he can read the data in the protocols, he can also recognize them; if he can't, there's no point to even having anything to look at in the first place.

-----Original Message-----
From: David Pick [mailto:d.m.pick@qmul.ac.uk] Sent: Wednesday, April 30, 2003 12:37 PM To: pen-test@securityfocus.com
Subject: Re: project

> I mean I have captured data using Tcpdump (i.e. raw data), how to I
> recombine the data into the orginal word attachment (or like)? Cannot
> seem to find any information anywhere on the technical involved in
> this.

You'll not only need to reassemble the packet streams, you'll also need to know what protocol was used to transport the higher-level data. For example, was the data flowing over a "connection" to a file server? if so you'll need to work out which protocol was used (NFS, CIFS, NCP, something else...). Or if it was carried by EMail you'll need to extrace the message text from the SMTP (or POP or
IMAP) protocol information and then (perhaps) extract individual attachments from the message, and then reverse the Base64 encoding (or whichever it was) and then...

-- 
	David Pick


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