USB-C cables are typically used to transfer data or charge devices, but some can hide malicious hardware capable of intercepting data, eavesdropping on calls and messages, or even taking full control of your PC or smartphone. The first such cables appeared in 2008, though they were rare and expensive at the time, leaving average users mostly unaffected.
Today, the availability of malicious USB-C cables has skyrocketed, with specialized spy shops and dishonest sellers offering them disguised as legitimate products. This widespread availability significantly increases the risk of purchasing one unknowingly and falling victim to cyberattacks.
Detecting malicious USB-C cables is challenging as they are designed to look identical to regular cables. Recent research by Lumafield revealed that only a 3D CT scan can fully confirm the presence of harmful components within these cables. Using the notorious O.MG USB-C cable as a test subject, Lumafield demonstrated that a 2D X-ray could detect the antenna and microcontroller, but only a 3D scan revealed additional hidden components, such as wires connected to a die stacked atop the microcontroller.
While most users lack access to such advanced scanning tools, there are practical measures to avoid malicious cables. Purchasing from trusted manufacturers like Anker, Apple, or Belkin ensures higher quality and reduces the risk of harmful hardware. Paying attention to warning signs, such as unusual brand names, strange markings, or USB-C connectors that emit heat when not in use, can also help identify suspicious cables.
Additionally, tools like the O.MG malicious cable detector can identify and block harmful cables while functioning as a data blocker. Businesses and organizations handling sensitive data are encouraged to use specialized services like Lumafield for 100% accurate detection, though these come at a cost.
Raising awareness about malicious USB-C cables is crucial, as many users remain unaware of the risks. Sharing these preventative tips with family and friends can help safeguard personal and professional data, contributing to a safer digital environment for everyone.
