As researchers note, a smart TV contains a speaker and a quick blast of YouTube could be all that’s needed. This is the daisy-chain style approach, where all of the cool technology in all of your devices slowly comes back to haunt you. The second form of attack is where the first device containing a speaker is used to communicate with a second device containing a microphone. Below you can see a video where the NUIT attack results in an unlocked door.

This could be, for example, a rogue app or an audio file. One is where NUIT is happening on the targeted device itself. There are 2 different ways to launch this attack. They’re able to pick up what is described as the “near-ultrasound” frequency range (16kHz - 20kHz), and this is where NUIT lurks.Ī NUIT sound clip can be played on the targeted device’s speaker which allows for the voice assistant to be attacked on the device itself, or even another device altogether. This attack relies on abusing the high sensitivity of microphones found in these IoT devices. Impacted assistants include Siri, Alexa, Cortana, and Google Assistant. NUIT is designed to attack voice assistants with malicious commands remotely via the internet.

A new form of attack named “Near Ultrasound Inaudible Trojan” (NUIT) has been unveiled by researchers from the University of Texas.

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