Understanding Keyloggers and Malware Threats
Keyloggers and malware are software threats that compromise your device. Once installed, they operate silently, capturing credentials, monitoring activity, and providing attackers with access to your accounts and assets.
This article explains how these threats work and how to prevent device compromise.
Basic Function
A keylogger records every keystroke you make. This includes:
Passwords
Email addresses
2FA codes
Private keys
Credit card numbers
Personal messages
The recorded data is sent to the attacker.
Types of Keyloggers
Software Keyloggers
Programs installed on your device. These can be:
Standalone applications
Browser extensions
Part of larger malware packages
Hardware Keyloggers
Physical devices are installed between the keyboard and the computer. Less common for personal attacks, but relevant for:
Public computers
Shared workplace devices
Compromised ATMs or payment terminals
Modern malware does more than record keystrokes:
Screen Capture
Takes screenshots at intervals or when detecting financial applications. This captures:
Account balances
Transaction details
Visual passwords
QR codes
Prevention Strategies
Security Software
Install Antivirus/Anti-Malware
Use reputable security software:
Windows Defender (built-in for Windows)
Malwarebytes
Bitdefender
Norton
Kaspersky
Keep It Updated:
Security software is only effective if current. Enable automatic updates.
Run Regular Scans:
Schedule full system scans weekly. Run additional scans if you suspect compromise.
System Updates
Keep Operating System Current
Updates include security patches. Install them promptly.
Enable Automatic Updates:
Windows: Settings > Update & Security > Windows Update
macOS: System Preferences > Software Update
Linux: Use the distribution's update manager
Update All Software:
Not just the operating system. Update:
Browsers
Browser plugins (Flash, Java, etc.)
Office software
Media players
Any installed applications
Outdated software provides entry points for malware.
Safe Browsing Practices
Avoid Suspicious Websites
Do not visit:
Piracy sites
Sites offering free versions of paid software
Sites with excessive pop-ups
Sites where the browser shows security warnings
Verify Downloads
Before downloading anything:
Verify the source is legitimate
Check file reputation (Google the filename + "malware")
Scan downloaded files with an antivirus before opening
Use Browser Security Features
Enable:
Pop-up blocker
Phishing protection
Safe browsing warnings
Email Security
Do Not Open Suspicious Attachments
Even if an email appears from a known sender:
Unexpected attachments are suspicious
Verify with the sender through a different channel before opening
Be especially careful with .exe, .zip, and .scr file types
Do Not Click Unknown Links
Hover over links to see the actual URL before clicking. If the URL does not match the expected destination, do not click.
Physical Security
Lock Your Device
Always lock your device when stepping away:
Windows: Windows Key + L
Mac: Control + Command + Q
Set an automatic lock after a short inactivity period
Use a strong device password
The device lock screen password should be strong. This prevents physical access if the device is stolen.
Secure Your Physical Space
Do not leave devices unattended in:
Public spaces
Vehicles
Hotel rooms
Even office spaces (if possible)
Network Security
Use Secure Networks
Avoid public WiFi for financial access (covered in previous article).
Enable Firewall
Operating system firewalls prevent unauthorized network access:
Windows: Control Panel > System and Security > Windows Firewall
Mac: System Preferences > Security & Privacy > Firewall
Ensure firewall is enabled.
Need Help?
If you encounter issues that this article does not resolve:
Contact Bitlease Support:
Email: support@bitlease.com
Subject: "Keyloggers threats Issue"
Include: Description of the problem, any error messages, and steps you have already tried
Response time: Within 24 hours
For urgent security concerns:
Email: security@bitlease.com