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MartijnBraam01/17/20254 repliesview on HN

I came across the tweet about this "Evil" dongle and instantly recognized it as the exact same thing I worked on before... It's not evil, it's just annoying.

https://blog.brixit.nl/making-a-usb-ethernet-adapter-work-sr...

In my case I disabled the SPI flash module to have it not appear as a CD drive, the author of this post actually found some documentation about the SPI being optional. Funnily enough this post now also gives you all the tooling to make an actual evil RJ45 dongle by reflashing one :D


Replies

LeifCarrotson01/17/2025

What happened to U3 at the top left in the image of the flash chip?

Looks like they had a footprint for a diode in a 3-pin SOT23 package and found they didn't have stock of the special part, so they installed a SOD323 diode at a 30 degree angle across two pins...

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Cthulhu_01/18/2025

> Funnily enough this post now also gives you all the tooling to make an actual evil RJ45 dongle by reflashing one :D

Ironic! I'm convinced most security problems are caused by well-meaning people breaking down hard- and software and explaining how to "hack" things. I mean if that's unintentional than at best it was security by obscurity to begin with which should be exposed so people don't rely on it.

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gus_massa01/18/2025

Is it possible to add an autorun.inf to the fake cd?

stavros01/17/2025

Hm, why does shorting CS and S0 make it not work?

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