{tocify} $title={Table of Contents}
How USB Devices Can Act Like Something Else to Cause Harm
Some USB devices can pretend to be more than one thing, like a keyboard or mouse. Computers trust USB devices based on what they say they are. For example, a harmful USB might act like a keyboard and type commands to install malware.
The tricky part is that the computer can’t tell the difference between real actions from the user and fake ones from the USB.
The Old Days of Autorun and Other Weaknesses
In the past, Windows computers had a feature called autorun.inf. This let USB devices automatically open programs when plugged in. It made things easier, but attackers used it to spread harmful programs.
Today, most systems don’t use autorun anymore. However, attackers still find ways to trick computers, like hiding harmful scripts or using flaws in how icons are shown.
Advanced Tricks: Messing with Firmware and Protocols
Some USB devices go beyond basic tricks and target deeper system weaknesses. They might exploit bugs in the device firmware or how the computer handles certain commands. For example, a USB could send bad data that forces the computer to run harmful code.
One famous example is the Stuxnet worm, which attacked industrial systems using similar techniques.
More Than Malware: Physical Damage from USBs
USB attacks aren’t always about software. Some devices, called "killer USBs", send powerful electric charges through the port. This can destroy the computer's ports or even its motherboard. These devices don’t store files; they just deliver harmful electrical energy.
How to Stay Safe from Harmful USBs
To stay safe, avoid plugging in USB devices you don’t trust. Most modern computers have built-in protections, but you can also:
- Enable secure boot.
- Turn off unused USB ports.
- Use policies that limit which devices can connect to your computer.
Conclusion
Harmful USB devices are dangerous because they take advantage of trust, firmware issues, and even physical attacks. Learning about these risks and using good security practices—like avoiding unknown USBs and enabling modern protections—can help you stay safe.
Source: Reddit
Read also:
Understanding the Importance of VPNs on Public WiFi
Why Computers Are More Vulnerable to Viruses Than Mobile Devices