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Pixhell Attack: Leaking Info from Air-Gap Computers via 'Singing Pixels'

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Re: Pixhell Attack: Leaking Info from Air-Gap Computers via 'Singing Pixels'

#31

Earlier quoted context omitted.

All sorts of practical questions. Can you bring in a lunch (is that a Coke bottle or a secret camera?)? Are there trash bins? If there is water, does that mean there are bathrooms (who does the restocking?)? Is there coffee?! Who/how do you get data into the network? Who/how do you get data out of the network? Can you bring in printed reference materials from a slightly less secure facility? Bottom line: probably a h…

It is a huge PITA. I recently quit a job where I helped out with a PKI environment that was air-gapped. We employed a lot of improvised quality of life solutions that management doesn't want to know about.

Oh gosh. PKI environments are the worst. I've worked at ZRM and KES type environments, but PIK, those are awful.

Re: Pixhell Attack: Leaking Info from Air-Gap Computers via 'Singing Pixels'

#32

Earlier quoted context omitted.

Not an alternate timeline, I went to a blackhat talk that was exfiltrating data from airgapped computers with unconnected parallel port pins, printers (exact same thing as making them make music but faster and with EM), and other peripherals. At a usable distance of some meters too.

You can broadcast FM radio over short distances by doing PWM over GPIO pins, so that does not suprise me! I used this for switching radio controlled power outlets which had 433mhz receivers. [2] [1] https://github.com/markondej/fm_transmitter?tab=readme-ov-fi... [2] https://github.com/F5OEO/rpitx

There's also a recent "RAMBO" paper about using code to control how memory is accessed so that standard DRAM chips/circuitry will emit decode-able radio signals, at least enough to extract private keys from otherwise air-gapped computers.
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