DEF CON 29 Badge Hacking

[umb4a]

FezPirate who wanted the files from the boot loader here they are https://cryptpad.fr/file/#/2/file/y3...QJ9Al+GsqiciG/

Do note that on the serial interface and the included instructions it says the following:

Note: This badge is running very limited firmware. The full firmware will be available when DEF CON starts.

[StackingAces]

Having fun with this, thanks for the help folks! This is the first time that I have done this kind of thing, total n00b over here. I have had an interest in this stuff for years and dabbled here and there but due to mental and physical health issues never had the energy or time. Now I am beginning to feeling better and my drive is in high gear to learn this stuff.

[genoff]

I discovered that the right side acts as a volume slider when connected to a computer

[leeloo1313]

I saw this too - was hoping it would trigger an awesome spotify list ;)

[stanto]

compukidmike, are people who have the badge but are not going to DC in person be able to plays the games and do badge stuff?

I've seen USB over IP being a thing... though how applicable that is, I'm not sure.

[Harley Quinn]

Has anyone tried taking apart the badge?

[_Giglio]

Here you go https://imgur.com/a/1obTPUz

[Harley Quinn]

Thanks! Did yours come with the bottom connector or did you solder it on yourself? Mine came with an extra connector but my friends badge did not.

[_Giglio]

Those aren't my photo's - sorry didn't mean to make it seem that way. Mine came with the large USB connector already installed on the bottom.

[wyatt_earp]

In the event you want to have a case for you badge so that it doesn't slide around your desk, I whipped this up

https://cad.onshape.com/documents/95...f173e047bd5c06

Printed on an Ender5

• 0.2mm layer hight
• 10-20% infill
• 50-80mm/s speed

Here's a draft version of the holder - https://imgur.com/gallery/sb8Ba0F

[StackingAces]

I don't have a 3D Printer can I buy this somewhere?

[Zaph]

Thank you for sharing! Just printed mine.

[dmr]

I tried downloading a .stl file for this, but for some reason the dimensions are really wonky. I've tried both PrusaSlicer and Cura. PS will slice it if I blow it way up, but Cura just refuses and generates errors.

Can you please tell me what the max dimension on the X axis is? From your drawing it looks like about 73mm (~2.87") but I can't be sure, and I don't want to print it until I know the size. I want to print this and bring it along with me.

Thanks.

In the event you want to have a case for you badge so that it doesn't slide around your desk, I whipped this up

https://cad.onshape.com/documents/95...f173e047bd5c06

Printed on an Ender5

• 0.2mm layer hight
• 10-20% infill
• 50-80mm/s speed

Here's a draft version of the holder - https://imgur.com/gallery/sb8Ba0F

[wyatt_earp]

I noticed that OnShape is defaulting to exporting in meters instead of mm ... I don't know why because the project is set to mm. It should be pretty close to 72-73mm. Let me see if I can fix the link for editing.
I exported the STL and put it on Thingiverse to try and address the slicing issues. Cura 4.8.0 didn't have any issues with it?

https://www.thingiverse.com/thing:4919582

[dmr]

I have Cura 4.8.0 and here's what I get when I try to slice it ...

[dmr]

The one on Thingiverse slices normally. It says the X dimension is 74.25mm. I'll try printing it when I get back home.

Thanks.

[wyatt_earp]

The one on Thingiverse slices normally. It says the X dimension is 74.25mm. I'll try printing it when I get back home.

Thanks.

Thanks for letting me know - I'm not super familiar with the OnShape thing - but clearly the Thingiverse distribution is a better idea!

[dmr]

I just got in. It sliced fine (PrusaSlicer) and is now printing. Gonna take 2 hours and some minutes to print. I'll post a photo when it finishes.

[pigeondrops]

Hi Just got my badge today. It looks great however the J3 connector pin was not soldered in and a small piece of plastic I found in the bubble wrap. Not sure where to contact but in discord it was mentioned to post it in here. Thanks!

[wyatt_earp]

Check out the contact info at https://shop.defcon.org/ and let them know what happened. There are indications there will be spare key-caps at the con, but other pieces are unknown at this point.

[pigeondrops]

Thanks I just emailed them.

[dmr]

Here's the finished print ...

Looks good and printed nicely. Thanks.

[kallahar]

Goon firmware as shipped: https://kallahar.com/defcon/2021/Def...as_shipped.zip

UF2 Bootloader v3.13.0-9-g2fd0593-dirty FAO
Model: DEF CON 29 Badge
Board-ID: SAMD21G16B-dc29-v0

[raven_coda]

Thanks for posting this. The firmware has the same hash as the human one so it looks to be no different.