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How I created a $10 ESP8266 GPS Tracker that uses Open Wi-Fi networks & DNS exfiltration for communication.

Low-Cost Tracking Challenge
In a recent Hak5 episode, I took part in a challenge to track our elusive friend, Irish, and determine the various places he visited throughout the day.

Since low-cost hardware & disposable signals intelligence is a core part of my projects, I challenged myself to create a tracker in the smallest practical footprint, and designed a $10 device that uses only Wi-Fi to provide location updates once planted on Irish’s car.

Using DNS Exfiltration, CanaryTokens, an an ESP8266 with specialized low-power hardware, I created a motion activated tracker that could transmit intermittent location updates, by connecting to open Wi-Fi networks that Irish would drive past.”

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