full-disclosure - FoFuS - PoC bot using DNS cover channel

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Date: Sun, 3 Jun 2007 12:59:31 -0300
From: "Fábio Martins a.k.a Fósforo" <fosforo@...il.com>
To: full-disclosure@...ts.grok.org.uk
Subject: FoFuS - PoC bot using DNS cover channel

I haven't seem a bot using dns covert channel, so i've tried to create one.

client poorly written in assembly 32 bits and server poorly written in
perl. given a list of public domains extracted from
http://freedns.afraid.org/ the bot tries to contact his master and
after a very simple challenge (xor/sub/add) the master can ask for
system version, submit files, and code execution (maximum of 399
bytes) - with only dns packets.

to test it, need to create a subdomain at freedns.afraid and a machine
listening on port 53 to where the server answer requests.

http://fosforo.sytes.net/FoFuS_PoC_bot_beta2.tar.gz

[]s

-- 
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Fósforo
Blog: http://insanenetworks.blogspot.com
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Bcz sex is like hacking.. you get in, you get out, and you
hope you didn't leave something behind that can be traced
back to you..
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