An information security specialist is reviewing the following output from a Linux server. Based on the above information, which of the following types of malware was installed on the server?

A logic bomb is a malicious program or code snippet that lies dormant within a system until a predefined event or condition triggers its execution. This condition could be a specific date and time, the launch of a particular program, a user action, or a change in system state, making it difficult to detect before activation.

A Trojan disguises itself as legitimate software to trick users into installing it, focusing on deceptive delivery rather than solely conditional execution.

A backdoor provides unauthorized remote access to a system, typically bypassing normal authentication or encryption, rather than waiting for a specific trigger condition.

Ransomware encrypts a victim's files and demands a ransom for their release, which would manifest as encrypted data and ransom notes, not necessarily a dormant conditional trigger.

A rootkit is designed to hide its presence and the presence of other malicious software from detection, often by modifying operating system components, rather than being defined by a conditional activation.