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stacksmashing

16 Aug, 7 tweets, 2 min read

Bought one of those small 7” field monitors for filming…

Turns out it drains its battery with 72mA - while turned off 😐

I’m sure my NP-F550 batteries really like to get discharged to absolute zero 🥲

Is that a debug header? 👀

Wow, didn’t expect to find a Spartan 6 in there 😶

No clue what that guy is though

Just the right carpet to search a tiny black screw on🥲

Back together (well, minus one screw) - might dump the two flashchips (Zbit 25VQ32BSIG) tomorrow just out of curiosity

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More from @ghidraninja

stacksmashing

@ghidraninja

4 Aug

20 arcade buttons and a Raspberry Pi Pico make for a fun evening project 😀

Total project costs:
- $30 for arcade buttons
- $4 Pico
- $10 Blade receptacles
- Wire + random wooden board I had laying around

Time: Roughly two hours for the build (damn cable crimping). Takes longer if your chordless drill dies in the middle 🥲

In German we call it “Kabelsalat”

Read 6 tweets

stacksmashing

@ghidraninja

8 May

@colinoflynn

Yesss!!! After hours of trying (and bricking 2 AirTags) I managed to break into the microcontroller of the AirTag! 🥳🥳🥳

/cc @colinoflynn @LennertWo

Dumped the firmware and some important areas😀(am I missing any other important ones from the nRF52?)

@colinoflynn

Thanks to @colinoflynn for the test point mapping (and nerdsniping me with the AirTags in the first place), and also for listening to my rambling/cursing/etc :)

Read 6 tweets

stacksmashing

@ghidraninja

7 May

@colinoflynn

Continuing the tweet-chain of @colinoflynn on AirTag hacking, we will look at the flash contents now!

https://twitter.com/colinoflynn/status/1390486554586587139

@naehrdine

Similar to most Apple embedded devices, the AirTags also seem to run RTKit... And this is where it gets interesting: It's a DEBUG build - debug builds have more functionality, and sometimes more logs & co - this is good news!

/cc @naehrdine

Also looks like the firmware for the U1 DSP is on the flash, as you can find a ton of AArch64 instructions

Read 20 tweets

stacksmashing

@ghidraninja

12 Nov 20

My Nintendo Game and Watch arrived a day early! Let’s tear it down and see how it works - and how easy it is to hack it!

For opening it up you unfortunately need some Y-style screwdrivers - let’s see what’s underneath!

Interesting, an STM32H7B0VBT6 is the main processor! Cortex-M7, 128 KBytes Flash, 1024 KBytes of RAM. Also some unpopulated headers close by that expose SWD (the Arm Cortex-M debug interface)!

Read 20 tweets

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