GIAC Information Security Fundamentals (GISF) Practice Test 2025 - Free GISF Exam Practice Questions and Study Guide

The primary function of a rootkit is to allow undetected access and control to hackers. Rootkits are a type of malicious software that are designed to hide their presence and the presence of other malicious applications on a system. By doing so, they enable an attacker to maintain privileged access to a compromised system without being detected.

Rootkits work by altering standard operating system functions or using various techniques to ensure their code remains concealed. Once installed, they can allow an attacker to monitor user activity, steal sensitive information, or even manipulate system processes. This stealthy nature is what makes rootkits particularly dangerous, as they can maintain control over a system while evading traditional security measures.

Other options discuss functions that do not align with the primary purpose of rootkits. For instance, managing system resources efficiently relates to operating system functionality rather than malicious intent. Encrypting data for secure transmission serves a legitimate purpose in protecting information but is unrelated to the deceptive control exerted by rootkits. Similarly, detecting and mitigating other forms of malware describes the functions of security tools rather than the objectives of a rootkit, which aim to obscure and facilitate unauthorized access instead.