Keylogger

A Keylogger is a type of malicious software or hardware device that monitors and records every keystroke made on a target system. Keyloggers can capture sensitive data, such as passwords, credit card information, and private communications, often without the user's knowledge, posing a significant threat to security and Privacy.

Keyloggers operate by tracking user input at the keyboard level and storing or transmitting this data to the attacker. They may be installed as malicious software (Malware) on a device or embedded as hardware components, such as USB devices or modified keyboards. Keyloggers are commonly used in Cybercrime to steal credentials, spy on user activity, and gain unauthorised access to systems.

The purpose of a Keylogger is to capture and record user input for unauthorised access, data theft, or surveillance. Keyloggers are often used by attackers to steal sensitive information, such as login credentials, banking details, or confidential messages. In some cases, they are used for legitimate purposes, such as parental monitoring or employee surveillance, but their use raises ethical and Privacy concerns.

Software Keyloggers are typically installed via malicious attachments, Phishing emails, drive-by downloads, or as part of a Malware bundle. Once installed, they run silently in the background, recording all keystrokes. Hardware Keyloggers are connected directly to the keyboard or between the keyboard and computer, capturing input data without requiring software installation. Detection and removal may require specialised anti-Malware tools and physical inspection of hardware devices.

Examples of Keyloggers include software-based Keyloggers that capture keystrokes on infected systems, and hardware Keyloggers, such as small devices that connect to a keyboard's USB cable. Malware campaigns often use Keyloggers to steal banking credentials or compromise business systems.

Keyloggers can lead to serious security breaches, data theft, and Privacy violations. Protecting against Keyloggers involves using up-to-date anti-Malware solutions, practising safe browsing habits, employing two-factor Authentication (2FA), and regularly monitoring devices for unusual activity. Physical security measures are necessary to detect and prevent the installation of hardware Keyloggers.