CyberGuard dictionary / Malware
Keylogger
A keylogger is software or hardware that records keystrokes, often to capture credentials or other sensitive input.
In simple terms
It watches what a person types. Some keylogging is authorized for testing or accessibility, but covert collection is a common abuse.
Technical explanation
Collection may occur through operating-system hooks, browser injection, accessibility features, or physical devices. The resulting data can expose passwords, messages, and payment details; authentication controls and endpoint monitoring limit different parts of the risk.
Key capture can be software-based or physical and may collect more than passwords, including messages and payment details. Response depends on what was typed during the exposure window.
Examples in practice
Malware records a user's login keystrokes and sends the captured password to an attacker-controlled service.
A malicious extension records keystrokes while a finance worker signs in. The company removes it, revokes active sessions, and reviews transactions made during the affected period.
Why it matters
A single compromised endpoint can reveal secrets typed into otherwise legitimate websites.
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Sources and further reading
Published 2026-10-15 · Last updated 2026-10-15 · CyberGuard editorial content. Source links provide context; they do not imply endorsement.