Keylogger
Malicious software that records keystrokes on a device to capture passwords and other sensitive information without the user's knowledge.
A keylogger is a type of spyware that records every keystroke made on a compromised device. This captures usernames, passwords, credit card numbers, messages, and any other typed information. Keyloggers can be software-based (installed via malware) or hardware-based (a physical device plugged between the keyboard and computer).
Keyloggers are one of the oldest and most effective credential-theft tools. Even strong, unique passwords are vulnerable if the device is compromised.
Defenses include anti-malware software, regular system scans, virtual keyboards for sensitive inputs, and (importantly) MFA. Even if a keylogger captures a password, a second factor (like a TOTP code from a phone) prevents the attacker from using it. Password manager autofill can also reduce keylogger exposure by minimizing manual typing.
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