Re: alpha numeric exploitation

[Nick FitzGerald <nick () virus-l demon co uk>]

RaMatkal wrote:

> I'm trying to develop an alphanumeric payload that needs to do a JMP -600 bytes...
>
> Anyone got any ideas how to do this with only alpha numeric chars?
>
> 'eb' and 'e9' are obviously out of the question...

Think "encoding/decoding" and "self-modifying".

EICAR.COM has been doing it for more than decade to get its INT (cd) op-
codes executed, so this is hardly revolutionary new territory...

Beyond that, I'd be extremely surprised if someone hasn't written 
tutorials on doing alphanumeric-only payloads, if not even provided 
toolkits to take arbitrary code and "ASCII-fy" it.


Regards,

Nick FitzGerald

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