A user reports that every document, photo, and spreadsheet on their PC now has an unfamiliar file extension and cannot be opened. A note on the screen instructs the user to send cryptocurrency in order to receive a decryption key that will restore their data. Which type of malware is most likely responsible for this behavior?
Spyware
Keylogger
Ransomware
Rootkit
Ransomware is malicious software that encrypts a victim's files and then demands payment-usually in cryptocurrency-for the decryption key needed to restore access. Rootkits are designed to hide elevated privileges, spyware covertly gathers information, and keyloggers capture keystrokes; none of these typically encrypt user files or demand payment.
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