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In this chapter, we provided a lot of information about hooking tables of function pointers, both in userland and in the kernel. Kernel hooks are preferred, because if a detection/protection software suite is looking for your rootkit, you may employ all the power of the kernel to evade or defeat it. Kernel-level access provides a vast number of places to hide from or ways to defeat the enemy. Since stealth is a primary goal for your rootkit, filtering in some fashion is a must.

Hooking is truly a dual-use technology. It is used by many public rootkits and other malicious software, but it is also used by anti-virus software and other host-protection products.

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    Rootkits(c) Subverting the Windows Kernel
    Rootkits: Subverting the Windows Kernel
    ISBN: 0321294319
    EAN: 2147483647
    Year: 2006
    Pages: 111

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