Re: What if CodeRed encoded it's HTTP requests?

From: Ryan Russell (ryanat_private)
Date: Mon Aug 20 2001 - 08:52:51 PDT

  • Next message: Jose Nazario: "Re: What if CodeRed encoded it's HTTP requests?"

    On Mon, 20 Aug 2001, Nuno Mendes wrote:
    
    > I was just checking how many CodeRed I and II attempts I had on my Linux
    > based Apache server, and figuring out what if a new version of the worm
    > encoded 'degault.ida' in hexadecimal? Or even the data that causes the
    > buffer overflow?
    
    Not that the word "default" is arbitrary.  You can change it to whatever
    else you want.
    
    >
    > It seems a lot of tools are based on 'default.ida' string.... aren't they?
    >
    
    I've only looked closely at the Snort rule, which says (if I remember
    correctly) .ida? (or .idq?) anywhere in the request, and the request is >
    259 characters.
    
    Now, if you do some games with the .ida part... Well, I believe Snort has
    a HTTP encoding decoder... don't know how effective it is.
    
    						Ryan
    
    
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