• An Analysis of Conficker from SRI

    Posted on February 25, 2009 at 02:16 CST by • Comment in the Forums

    If you’ve been following the amazing feats of the Conficker worm, you should check out this new white paper from SRI International.

    In this paper, we crack open the Conficker A and B binaries, and analyze many aspects of their internal logic. Some important aspects of this logic include its mechanisms for computing a daily list of new domains, a function that in both Conficker variants, laid dormant during their early propagation stages until November 26 and January 1, respectively. Conficker drones use these daily computed domain names to seek out Internet rendezvous points that may be established by the malware authors whenever they wish to census their drones or upload new binary payloads to them.  This binary update service essentially replaces the classic command and control functions that allow botnets to operate as a collective. It also provides us with a unique means to measure the prevalence and impact of Conficker A and B.

    Windows Patches/Security
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