RE: mitigating botnet C&Cs has become useless

From: Scott Weeks (no email)
Date: Thu Aug 03 2006 - 18:22:31 EDT

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    ----- Original Message Follows -----
    From: "Barry Greene (bgreene)" <>

    > > What? That's what I'm trying to find out, but I'm not
    > > as smart as most, so I can only point out the things
    > > that I believe definitely won't work and why I think
    > > that. Hopefully by the application of flame to my butt
    > > by smart people for saying what I do will spark some
    > thought toward the goal.
    >
    > Start with:
    >
    > http://www.nanog.org/mtg-0602/greene.html

    I didn't see anything in there relating to bot brains.
    Also, with regard to 'cyberspace is just a meatspace
    overlay' I considered whay would I do to troubleshoot an
    overlay network. I'd work on the layer where the problem
    exists. (Duh! :) Here, the problem exists at two layers:
    Technically it's allowed and meat-wise there're those kinds
    of people in this world. So, the solution must be at both
    layers; meatspace and cyberspace. That makes us all
    correct, yes? (again, I'm putting on my flame-proof
    underpants... ;-)

    One thing someone mentioned offline:

    > The goal, as noted, shouldn't be to shut these things
    > down. It should be to keep them operating, not interfered
    > with, so that the C&C channels remain detectable

    > Shutting down C&C's is a direct action.
    >
    > More fun? Monitor those C&C's. In real time, update your
    > filtering to tag attack packets as a QoS that is
    > rate-limited at your borders. This would be hard for a
    > botherder to detect, but would limit damage against remote
    > sites. You don't actually want to *block* them; blocking
    > them lets the botherder know that you're on to them. But
    > this has to be done fairly cleverly (much moreso than I
    > suggest), so that they can't easily figure it out. This
    > is just an example for the sake of conveying the overall
    > idea.

    > But shutting them down, that's like the police arresting
    > all the informants. It doesn't stop the crime, it just
    > eradicates all your easy leads.

    What're folk's thoughts on that?

    scott


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