To invisibly maintain access to a machine, an attacker utilizes a rootkit that sits undetected in the core components of the operating system. What is this type of rootkit an example of?
Kernel rootkits are installed in RING ZERO, prior to AntiMalware software being installed in RING 3. RING 3 apps can't inspect RING 0 due to lack of the appropriate privilege's for RING 3.
For reference: Hypervisor-Level Rootkit: Attackers create hypervisor-level rootkits by exploiting hardware features such as Intel VT and AMD-V. These rootkits run in Ring-1 and host the OS of the target machine as a virtual machine, thereby intercepting all hardware calls made by the target OS. This kind of rootkit works by modifying the system’s boot sequence so that it is loaded instead of the original virtual machine monitor.
Types of Rootkits：Kernel-Level Rootkit
Add malicious code or replaces the original OS kernel and device driver codes.They are difficult to detect and can intercept or subvert the operation of an OS. (P.752/736)
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