Air-gapped computers represent one of the highest security measures one can take to secure a particular system. After all, the computer in question has no connection to any other network whether it is offline or online and in some cases is also physically isolated. How do you hack such a computer? Turns out, we have some insights into that too.
Mordechai Guri from Ben Gurion University in Israel has found out a new way that allows the attacker to extract data from such a computer.
See: 8 Technologies That Can Hack Into Your Offline Computer & Phone
Firstly, a piece of malware needs to be installed on a device through for example a mechanism such as a malicious USB. Then that malware needs to install code that can enable the very process of screen modulation to occur.
With this done, the attacker can alter the brightness of the LED screen on a very minimum scale and very fastly making them invisible to the human eye. Elaborating, the researchers state in their paper,
“How it works even while the user is working on the computer. Malware on a compromised computer can obtain sensitive data (e.g., files, images, encryption keys, and passwords), and modulate it within the screen brightness, invisible to users.”
Watc ..
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