It Might Get Loud! Exfiltrating Data Using Audio Interfaces

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Presented at InfoSecurityEurope 2019 by

Miguel Marques

Turning files into analogue signals is not a novel idea, modems did this many years ago... But how about using a USB soundcard to transfer files from a computer to another device? When classical methods fail, jazz it up and rock it out to get your data through very low or high frequency sounds!Learning Outcomes:How to protect isolated networks and environments from data exfiltrationEffectively control USB devices and other peripherals Implement system level controls and alerting using built-in capabilitiesImplement quick and dirty improvements on your physical securityPlan for secure isolated environments from a data exfiltration point of view