Keylogger

Keylogger as Hardware

Overview

Hardware keyloggers are used for keystroke logging, a method of capturing and recording computer users' keystrokes, including sensitive passwords. They can be implemented in sala madarevel firmware, or

alternatively, via a device plugged inline between a computer keyboard and a computer. They log all keyboard actions in their internal memory.

Hardware keyloggers have an advantage over software keyloggers as they can begin logging from the moment a computer is turned on (and are therefore able to intercept passwords for the BIOS or disk encryption software).

All hardware keylogger devices have to have the following:

A microcontroller - this interprets the datastream between the keyboard and computer, processes it, and passes it to the non-volatile memory
A non-volatile memory device, such as flash memory - this stores the recorded data, retaining it even when power is lost

Generally, recorded data is retrieved by typing a special password into a computer text editor. The hardware keylogger plugged in between the keyboard and computer detects that the password has been typed and then presents the computer with "typed" data to produce a menu. Beyond the text menu, some keyloggers offer a high-speed download to speed up retrieval of stored data; this can be via USB mass-storage enumeration or with a USB or serial download adapter.

Typically the memory capacity of a hardware keylogger may range from a few kilobytes to several gigabytes, with each keystroke recorded typically consuming a byte of memory.

Types of hardware keyloggers

A regular hardware keylogger is used for keystroke logging by means of a hardware circuit that is attached somewhere in between the computer keyboard and the computer. It logs all keyboard activity to its internal memory which can be accessed by typing in a series of pre-defined characters. A hardware keylogger has an advantage over a software solution; because it is not dependent on the computer's operating system it will not interfere with any program running on the target machine and hence cannot be detected by any software. They are typically designed to have an innocuous appearance that blends in with the rest of the cabling or hardware, such as appearing to be an EMC Balun. They can also be installed inside a keyboard itself (as a circuit attachment or modification), or the keyboard could be manufactured with this "feature". They are designed to work with legacy PS/2 keyboards, or more recently, with USB keyboards. Some variants, known as wireless hardware keyloggers, have the ability to be controlled and monitored remotely by means of a wireless communication standard.[citation needed]
Wireless keylogger sniffers - Collect packets of data being transferred from a wireless keyboard and its receiver and then attempt to crack the encryption key being used to secure wireless communications between the two devices.
Firmware - A computer's BIOS, which is typically responsible for handling keyboard events, can be reprogrammed so that it records keystrokes as it processes them.
Keyboard overlays - a fake keypad is placed over the real one so that any keys pressed are registered by both the eavesdropping device as well as the legitimate one that the customer is using.
Key commands - exist in much legitimate software. These programs require keyloggers to know when you’re using a specific command.

Buy a Keylogger Hardware

DIY Keylogger using an Arduino Nano and an ESP8266

for more details on how to Built a DIY Keylogger , you can watch this YouTube Video/Tutorial created by Lapara Retina .

How to protect yourself from Keylogger hardware

To protect yourself from keylogger hardware, consider the following measures:

Physical Security: Keep your devices physically secure and limit access to them. Be cautious of unfamiliar USB devices or peripherals connected to your computer or other devices.
Use Secure Devices: Purchase devices from reputable manufacturers and sources. Avoid using devices of unknown origin or those that have been tampered with.
Update Firmware: Keep your device firmware and BIOS up to date. Manufacturers often release firmware updates that address security vulnerabilities.
Use Anti-Keylogger Software: Install and regularly update reputable antivirus or anti-malware software that includes anti-keylogger features. These tools can detect and block keyloggers from operating on your system.
Be Cautious of Public Computers: Avoid entering sensitive information on public computers or untrusted devices. Assume that any device you do not own could potentially have keylogger hardware installed.
Monitor Network Traffic: Keep an eye on your network traffic using a network monitoring tool. Unusual or suspicious network activity may indicate the presence of a keylogger.
Use Virtual Keyboards: When entering sensitive information, such as passwords or credit card details, consider using virtual keyboards. Virtual keyboards can help protect against hardware keyloggers as they rely on mouse clicks rather than physical keystrokes.
Be Vigilant with Software Downloads: Download software only from reputable sources. Be cautious of freeware or pirated software, as these may contain hidden keylogger functionality.
Regularly Check for Hardware Tampering: Periodically inspect your devices for any signs of tampering, such as loose components, unfamiliar hardware, or unusual modifications.
Educate Yourself: Stay informed about the latest threats and security measures. Regularly educate yourself about different types of keyloggers and how to protect against them

By implementing these measures, you can significantly reduce the risk of falling victim to keylogger hardware attacks and protect your sensitive information.

keylogger as software

Overview

A keylogger is a type of software or program designed to monitor and record keystrokes on a computer or mobile device. It is often used for legitimate purposes such as monitoring user activity or for parental control, but it can also be used maliciously to capture sensitive information like passwords, credit card details, or personal messages.

Keyloggers can be installed on a system either intentionally or stealtstealthily,hily without the user's knowledge. They can operate at different levels, including the kernel level, to capture keystrokes before they are processed by the operating system.

Once installed, a keylogger silently records all keystrokes made on the infected device, including passwords, usernames, emails, instant messages, and other sensitive information. Some advanced keyloggers can also capture screenshots, track website browsing activity, and even capture webcam or microphone input.

It is important to note that using keyloggers without proper authorization is illegal and unethical. However, there are legitimate use cases for keyloggers, such as in organizations for monitoring employee activities or in parental control software to ensure the safety of children.

How to create a software keylogger (David Bombal Tutorial)

for more details on how to code a keylogger as software , you can watch those YouTube Video/Tutorial ( Video 1 , Video 2 , Video 3 ) created by David Bombal .

How to protect yourself from Keylogger software

To protect yourself from keylogger software, consider the following precautions:

Use Reliable Antivirus and Anti-Malware Software: Install reputable antivirus and anti-malware software on your devices and keep them updated. These tools can detect and block keylogger software from running on your system.
Keep Operating Systems and Applications Updated: Regularly update your operating system, web browsers, and other software with the latest security patches. Software updates often include bug fixes and security enhancements that can protect against keyloggers.
Exercise Caution with Downloads: Be cautious when downloading files or software from the internet. Only download from trusted sources and verify the authenticity and integrity of the files. Avoid downloading files from suspicious or untrusted websites.
Enable Firewall Protection: Use a firewall to monitor incoming and outgoing network traffic. Firewalls can help block unauthorized attempts to access your system and prevent keylogger software from transmitting data.
Be Wary of Phishing Attempts: Phishing emails or malicious websites often try to trick users into installing keylogger software. Be vigilant and avoid clicking on suspicious links or downloading attachments from unknown or untrusted sources.
Use Strong and Unique Passwords: Create strong, unique passwords for all your accounts and avoid using the same password across multiple platforms. This minimizes the risk of attackers obtaining your login credentials through keyloggers.
Enable Two-Factor Authentication (2FA): Enable 2FA whenever possible, as it adds an extra layer of security to your accounts. Even if a keylogger captures your password, the second factor (such as a verification code sent to your mobile device) provides an additional authentication step.
Regularly Monitor Your Accounts: Monitor your online accounts and financial transactions regularly for any suspicious activity. If you notice any unauthorized access or unfamiliar activity, report it immediately.
Be Mindful of Public Computers: Avoid entering sensitive information on public computers, as they may have keylogger software installed. If you must use a public computer, refrain from accessing confidential accounts or use virtual keyboards when possible.
Educate Yourself on Safe Online Practices: Stay informed about the latest threats and techniques used by cybercriminals. Educate yourself on safe online practices, such as recognizing phishing attempts, avoiding suspicious websites, and being cautious with email attachments.

By following these measures and maintaining good cybersecurity habits, you can significantly reduce the risk of falling victim to keylogger software and better protect your sensitive information.

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Last updated 1 year ago