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Research Paper: When the hammer falls - Effects of successful widespread disinfection on malware development and direction

Language:
English
Research paper on the effects of MSRT on specific malware development and direction - presented at VB2008.
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    Version:

    1.0

    File Name:

    McCormack-VB2008.pdf

    McCormack-VB2008.xps

    Date Published:

    2008-10-16

    File Size:

    3.8 MB

    1.4 MB

      ABSTRACT
      The arms race between the anti-virus industry and concerted malware developers continues to escalate. Microsoft’s Malicious Software Removal Tool (MSRT) is executed on over half a billion computers every month, giving it a huge execution base and an unparalleled view of malware operations. In their first month of targeting by MSRT, the Win32/Cutwail and Win32/Nuwar families yielded an infection spread of almost half a million distinct machines between them. MSRT’s monthly release provides a unique snapshot of the Windows ecosystem, and of the sledgehammer effect the tool has on the targeted families; an effect that can hardly be ignored by the malware’s authors. With so much money at stake, it appears that the malware developers do not go down without a fight.

      This paper couples analysis of the major malware families targeted by MSRT with the telemetry it gathers, in order to provide a perspective on how malware authors quickly respond to the massive impact on their networks after each release. Analyses of the techniques used to evade the MSRT are also presented. A look at the engineering evolution of each of these families with respect to MSRT releases is also explored.
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