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Is it possible to store a virus or key logger or something of that kind on a hardware that transmits data? I have recently bought a USB from Aliexpres and there is a bump on the cable, I did some research and apparently it's ferrite bead, but what if It isn't? Is it possible to create something that will do execute operation when plugged in?

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I doubt that a little bump on the cable would be enough room to hide a listening or attacking device.

But it is possible to hide such a device in an usb cable. One well-known example is the Cottonmouth-1 used by the NSA.

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