Whitepaper - Writing small shellcode

From: Dafydd Stuttard (daf_at_ngssoftware.com)
Date: 09/19/05

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    To: <bugtraq@securityfocus.com>, <vuln-dev@securityfocus.com>
    Date: Mon, 19 Sep 2005 14:06:20 +0100
    
    

    I have written a short whitepaper describing techniques for writing small
    shellcode. This can be downloaded from:

    http://www.ngssoftware.com/papers/WritingSmallShellcode.pdf

    Abstract
    This paper describes an attempt to write Win32 shellcode that is as small as
    possible, to perform a common task subject to reasonable constraints. The
    solution presented implements a bindshell in 191 bytes of null-free code,
    and outlines some general ideas for writing small shellcode.

    Cheers,

    Dafydd Stuttard
    Principal Security Consultant
    NGS Software Ltd


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