A Keylogger is basically software that records every key that a user presses on their computer (keystrokes). A technological tool that can be used for legitimate purposes, but is typically used as malicious spyware. It explores criminal purposes such as stealing passwords, credit card codes or confidential information about third parties. In short, information that cybercriminals can then exploit for illegitimate purposes.
Keylogger malware can be installed in the computer’s operating system (often in the kernel), at the keyboard API level, or in the computer’s memory. The detection of this malicious software is not always easy because it does not necessarily affect the performance of the equipment. Keylogger developers often get around antiviruses because of their ability to hide and stay under the radar. They usually surface as normal-looking files or traffic, and not only that, they are designed to automatically reinstall themselves.