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One of the most elusive types of malware in recent times that pose significant challenges in the computer security system is the kernel-level rootkits. The kernel-level rootkits can hide its presence and malicious activities by modifying the kernel control flow, by hooking in the kernel space, or by manipulating the kernel objects. As kernel-level rootkits change the kernel, it is difficult for user-level security tools to detect the kernel-level rootkits. In the past few years, many approaches have been proposed to detect kernel-level rootkits. It is not much difficult for an attacker to evade the signature-based kernel-level rootkit detection system by slightly modifying the existing signature. To detect the evolving kernel-level rootkits, researchers have proposed and experimented with many detection systems. In this paper, we survey traditional kernel-level rootkit detection mechanisms in literature and propose a structured kernel-level rootkit detection taxonomy. We have discussed the strength and weaknesses or challenges of each detection approach. The prevention techniques and profiling kernel-level rootkit behavior affiliated literature are also included in this survey. The paper ends with future research directions for kernel-level rootkit detection. |
