Which of the following statements are true about a keylogger? Each correct answer represents a complete solution. Choose all that apply.

The core function of a keylogger is to silently capture every keystroke made on a victim's computer and store those recordings in a log file that the attacker can later retrieve. This covert data collection is the defining characteristic of keylogger malware.

Keyloggers can be delivered and installed remotely through attack vectors such as phishing emails, trojans, or drive-by downloads, allowing an attacker to deploy them without requiring physical access to the target system.

Keyloggers are classified as spyware because they trace and monitor all or specific user activities - including passwords, messages, and browsing behavior - making them a covert surveillance tool on a compromised machine.

Destroying or scrambling data on the hard disk describes destructive malware such as a wiper or logic bomb, not a keylogger, which is designed for silent data collection rather than destruction.