Which type of malware is characterized by its ability to remain hidden for long periods?

A rootkit is a type of malware specifically designed to gain unauthorized access to a computer system while concealing its presence. Its primary characteristic is the ability to hide itself and other malicious software on the system, making it particularly difficult for users and security tools to detect. This stealthy operation allows rootkits to remain undetected for extended periods, enabling attackers to maintain control over the compromised system.

Rootkits often operate at a low level within the operating system, such as within the kernel, allowing them to intercept calls made by various software and conceal their activity. This makes it challenging for traditional antivirus programs to identify and remove them, as they can mask their own processes, files, and network connections.

In contrast, other types of malware may exhibit different behaviors and detection patterns. For instance, viruses tend to replicate themselves and typically manifest overt symptoms, while logic bombs execute specific harmful actions based on certain triggers, and Trojan horses disguise themselves as legitimate software but do not necessarily hide their presence over time like rootkits do.