A user attempts to open some files, but a message appears stating that the files are encrypted. The user was able to access these files before without receiving this message and no changes have been…

A cryptominer uses a computer's resources to mine cryptocurrency but does not encrypt user files.

Phishing is a social engineering technique used to trick users into revealing sensitive information, not a type of malware that encrypts files.

Ransomware is malicious software that encrypts a victim's files, rendering them inaccessible, and typically demands a ransom payment (often in cryptocurrency) in exchange for the decryption key. The scenario precisely describes the actions of ransomware, where users lose access to their own files due to encryption imposed by the malware.

A keylogger records keystrokes to steal information but does not encrypt files.