Hi readers! Suppose you type your email password into your laptop. There is nothing strange there. The website loads perfectly, your browser works flawlessly, and you do not get any alerts from your computer.
But what if everything that you type is tracked or recorded secretly without your knowledge?
This is what a keylogger does.
The keylogger is one of those spyware programs that are designed to log every keystroke typed by people using computers, mobile phones, and other electronic devices. This type of program is capable of logging passwords, banking details, chat logs, emails, and other sensitive information.
I personally find keyloggers interesting as cybersecurity tools since they do not necessarily have to crack some advanced security measures but rather target one of the most basic user activities – typing.
What is Keylogging?
This is a special program or software that tracks and records what a user is typing on the keyboard while working on a computer. This is also known as a keystroke logger.
A key logger is a form of malware that can capture usernames, passwords, credit card information, search queries, email, or private messages. Some forms of keyloggers can even take screenshots. It would be useful for you to learn about different types of malware.
The primary problem associated with keyloggers is that they can record information when someone is typing it in. An attacker uses this information to attempt to log into email, financial, or work-related systems.
It should be noted that there are keyloggers that are not considered to be malicious. Organizations can use them for lawful monitoring, debugging, and investigating purposes.
According to a report published by Abnormal Security, there was an 84% increase in business email attacks in the year 2021. Companies with 50,000+ employees are highly likely to face business email compromise attacks. This is a testament to why companies need to protect themselves from keyloggers.
How Does Keylogger Software Work?
A keylogger collects input, processes the information, and can send it to another computer. The following steps clearly describe the function of keyloggers:
Step 1: The Keylogger Gets Installed on a System
Hackers may attempt to install the keylogger on your system via a phishing attack, malware, or a software download. Moreover, it can also be loaded onto your machine physically.
Step 2: The Keylogger Collects Input
When installed, a software keylogger can collect keystrokes from the computer using various methods, which include interacting with the operating system API, specific applications, or web forms.
Step 3: The Keylogger Saves the Data
The keylogger can save the collected data either locally, where it can be stored together with the date and time of input, the name of the application or browser being used, etc.
Step 4: The Keylogger Sends the Information
A malicious keylogger can transmit the collected information to another place under the control of the attackers.
Types of Keyloggers
Type | How Does It Function? | Common Concern |
Hardware Keylogger | Makes use of a physical device to intercept keyboard signals | Physical surveillance |
Software Keylogger | Captures input and runs on the device | Data and credential theft |
Form-Grabbing Keylogger | Targets data entered into forms | Payment and login data |
JavaScript Keylogger | Utilizes malicious browser scripts | Web-based credentials theft |
API Keylogger | Utilizes OS and application functions | Capturing application input |
Hardware Keyloggers
This type of keylogger utilizes physical components.
A physical attacker with access to the computer might put a tiny hardware component in between the keyboard and computer. Other methods using hardware will use modified keyboards or hardware components internally.
The hardware keyloggers represent a new threat since traditional malware scanners will be unable to scan the physical hardware component.
Software Keyloggers
These keyloggers run inside the computer itself.
Attackers may place them in malware and downloads or even legitimate software. They might be present as part of an overall spyware attack or remote access trojan attack.
Since software keyloggers do not require physical access, it means that attackers can deploy the attacks remotely.
Form-Grabbing Keyloggers
These types of keyloggers try to capture information from the online form.
Imagine yourself entering your login details to get to a site. In addition to capturing those details through normal keyboard interception, the form-grabbing method will target information being entered on the web application.
CrowdStrike describes form grabbing as one of the software keylogging techniques.
JavaScript Keyloggers
These work using browser-based scripts.
The attackers can place the malicious JavaScript code on websites, or even use compromised web environments to track what people are typing.
There is a good lesson here. A keylogger is not necessarily an app that you would detect on your computer. Sometimes the activity will take place in the browser environment itself.
What Makes Keyloggers Utilize the Keyloggers?
The simple answer is: data and information.
One such machine can offer attackers the opportunity to obtain a continuous flow of sensitive information.
If the same user uses the same computer to access Gmail, bank accounts, company control panels, and cloud-based systems, a keylogger could reveal details associated with all of those accounts.
The purposes behind deploying such software by hackers include credential harvesting, financial fraud, identity theft, corporate espionage, and communication interception. Keyloggers are also often deployed alongside other malware and remote access Trojans by Microsoft.
Password Theft
Password information is extremely valuable since after obtaining the password via a keylogger, attackers might exploit it to hack into the account and/or any other service where it was used as a password.
Financial Data Theft
The keylogger program can capture information that was entered into banking or transactional websites. It can be used by the attackers for fraudulent purposes.
Corporate Information Theft
The keylogger installed on the employee's device can steal credentials, passwords, internal communication, or other sensitive information. These details, in turn, let you get access to the corporate network.
This is what makes keyloggers dangerous and harmful not just for individuals, but also for companies and organizations.
Is a Keylogger Always Malicious and Harmful?
No, it basically depends on the creator, developer, or the user of a specific keylogger.
The software can be employed by businesses for security and troubleshooting purposes and by parents in certain situations. Law enforcement agencies are also allowed to use surveillance technologies when authorized to do so.
What makes the difference is the purpose, authorization, transparency, and the applicable law.
It is one thing to install a keylogger secretly to steal someone else’s personal data and quite another matter to use it for security reasons.
How to Identify a Keylogger?
Identifying a keylogger can be tricky since many types of keyloggers run discreetly.
These are some of the clues that show there is a keylogger.
The machine becomes slow, typing is delayed, there are errors with browsing, and there are weird processes happening on your computer. But these indications are not always a sure sign of a keylogger since there are various non-malicious reasons that can lead to them.
It is more likely that you have a keylogger if there are signs of some strange activity following unexplained behavior like installing an unidentified program, opening a file attachment, or clicking on a strange link.
How Can You Protect Yourself From Keyloggers?
This is a list of measures that will protect you from keyloggers.
Always Have Updated Systems and Programs
Keep your OS, web browser, and other applications up-to-date. Security patches will reduce vulnerability to attacks from hackers.
Do Not Use Fraudulent Software
Do not run any pirated programs, suspicious software, or other dubious downloads. Be very careful if you encounter programs that require you to turn off security measures prior to installation.
Use Security Tools and Software
You can utilize an endpoint security or an antivirus product. A good security program should be able to detect and stop any malware, regardless of its suspicious behavior.
Opt for Multi-Factor Authentication
This will increase the level of protection in case someone steals your credentials. You will have to provide two-factor authentication in order to access your account.
Use Unique and Strong Passwords
Don’t use the same passwords for all accounts. A password manager can help you to manage your unique passwords.
Be Careful With Shared Machines
Try not to type your sensitive credentials in foreign systems. Use your own computer for important accounts.
Use a Firewall
A firewall is a security solution that will help detect unusual activities on your network. The firewall will help avoid keylogging since it will intercept all the data sent by the keylogger over the Internet.
Use a Password Manager
A password manager saves all your account passwords so that you only have to remember one password. Using a password manager will enable you to have strong passwords and change them often since you won’t have to remember them.
Last but not least, businesses can also boost their security by improving their cybersecurity maturity.
Keylogger vs. Spyware
Keyloggers and spyware are related concepts, though not interchangeable.
While a keylogger tracks keystrokes specifically, spyware is a broader concept of software monitoring or gathering of data from the user. Spyware could include keylogging as one of its features.
So, spyware would be the larger concept and keylogging the narrower one.
Reasons for the Relevance of Keyloggers
Credentials such as passwords and financial accounts continue to be a high-value target for criminals.
Keyloggers are aimed at collecting input from users. Thus, they allow malware to harvest information before it gets to any website or program.
This means that security awareness is crucial. The protection strategy should be comprehensive, with software updates, security tools, careful browsing, unique complex passwords, and MFA.
Organizations should also adopt the Zero-Trust Security Principles to maximize their security.
Conclusion
Hence, keyloggers can be used for proper purposes; criminals tend to misuse them to collect passwords, financial information, and personal and confidential information about the company.
Infection with software keyloggers can happen via phishing and malicious downloads or compromised websites, whereas hardware keyloggers need physical access to the computer.
It is foolish to completely rely on a single type of cybersecurity protection.
Make sure your software is updated, do not download anything suspicious, use security software, set unique passwords, and activate MFA. In case of any breach of security, refrain from using personal information and check the computer as soon as possible.
FAQs (Frequently Asked Questions)
Q1. What is a keylogger?
This is a method or program that tracks the keystrokes made by a user while typing on a keyboard.
Q2. Are all keyloggers used for evil?
Not necessarily, as there are legal ways of using keylogging tools.
Q3. Can a keylogger grab my password?
Yes, it can.
Q4. How do hackers utilise a keylogger to get access to a system?
A hacker can, with the help of a phishing attack, a malicious downloadable file, or some other malicious method, get access to a computer system.
Q5. Can MFA stop a keylogger?
It can minimize the impact of a keylogger.