Re: Automated File Carving?

["Maunu, Mark" <MARK.MAUNU () cubic com>]

Hi -

I have been using the Metaflows system for 2-3 years and its new file carving feature has made a killer product even 
more amazing!

I would recommend using Metaflows to anyone . The Metaflows team has come up with an amazing product and they keep 
adding killer features to make any analysts job easier.

Mark

From: Marcos Rodriguez [mailto:marcos.e.rodriguez () gmail com]
Sent: Wednesday, August 08, 2012 12:48 PM
To: Tim Covel
Cc: snort-users () lists sourceforge net
Subject: Re: [Snort-users] Automated File Carving?


On Wed, Aug 8, 2012 at 3:19 PM, Tim Covel <tcovel () metaflows com<mailto:tcovel () metaflows com>> wrote:
We've recently released a modified version of the ntop (GPL) which includes a file carving system designed to work with 
snort.

We've put together some screenshots of it here:
http://metaflows.tumblr.com/post/28491256039/file-extraction-malware
http://metaflows.tumblr.com/post/28128365399/quick-investigation-of-a-bothunter-alert-on-an

If you'd like more information on how to get and run it, let us know.

On 08/08/2012 11:13 AM, Jefferson, Shawn wrote:
Hi,

Not specifically Snort related, but I thought this might be a good place to ask first.

I have Snort IDS sensors, with full packet capture (OpenFPC), and Stream capture (StreamDB), and one-click access to 
these via customized BASE.  One extra thing I find myself wanting is automated file carving... sometimes I want to see 
the actual file downloaded (be it a PDF, or executable).  I would prefer to have a one-click access to this, so I was 
wondering if there is anything that automatically will carve files out and store them for easy retrieval?  BroIDS maybe?



hi Shawn, et al,

I'm not sure, but I thought (I'm a bit befuddled, so beware when I think!!!!)  that Snort could do this in conjunction 
with Razorback.  I could be way off base.  Bro includes file-extract.bro scripts for FTP and HTTP.  Suricata can 
currently support extracting files over HTTP.  It's probably the easiest method to try out, you could get it running in 
about half an hour from scratch.  Suri's file extraction is a quick "yes" field in the yaml file, and a rule keyword 
called filestore.

We're using this in our testing on a large network, and are reliably extracting executables.  One minor annoyance is 
the incremental naming of the extracted files as file.1, etc.  Each extracted file is accompanied by a meta file that 
contains the file name, source, dest, and all that jazz.

Hope this helps!

marcos

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