![]() ![]() This type of rootkit can be detected, however, by code running in what's called kernel mode. They can intercept system calls and can, for example, hide processes, files and registry keys. User-mode rootkits that have obtained administrative privileges can modify the memory space of other applications in order to disguise what is happening within the operating system. The name rootkit comes from the program's ability to obtain access to the core or "root" of a computer's operating system. This setting restricts their ability to cause damage through inappropriate or inadvertent access to system processes. Most applications run in what's called user mode. Let's take a closer a look at the nature of rootkits to see why they can be so difficult to remove. Your rootkit remover might have reported that it has successfully removed a rootkit from your machine, but how can you validate that? Certainly the only way to be 100% sure that a rootkit no longer exists on a machine is to reformat the hard drives and reinstall the OS. ![]() I think what your course tutor may well have meant was "How do you know if you've successfully removed a rootkit?" ![]()
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