Extracting and Modifying Firmware with JTAG
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- čas přidán 25. 10. 2022
- In this video, we discuss how to extract firmware from a RP2040 microcontroller on the Defcon 30 badge using JTAG. A JLink debugger is used. We also push a modified version of the firmware back to the device.
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#iot #jtag #defon #raspberrypi #iotsecurity - Věda a technologie
Great video! Minor vim note: at @17:30, you can use capital R to enter Replace mode. That way you won't have to count anything. Just make sure you only modify ASCII characters.
Oh my god, just found this channel and it's an absolute goldmine :-) thanks for all the awesome content!
Your channel is incredible!
Awesome video!! Could you do something with STM chips that are locked sometime soon? My vaguest of vague understanding is that you can sometimes do something with pulling boot select pins low to get it into a debug mode regardless of other configurations, but I don't have the first clue how to actually do that irl. Keep up the great videos m8!
I recently came across your channel and I love your videos. If you ever have a project where you gain practical functionality of a device by hacking it, that would make a great video. Like the security camera sending the stream to a self hosted storage server or other ideas you may have.
Great work 👌👏
Hi Matt, very Informative video. Is there any way to convert the binary dump to source code or to understand it better ?
Very nice
And that was preety amazing
Where is a repository link to PCB files of that badge? Looks like a nice little capacitive keyboard.
I am all for IOT companies not disabling JTAG. Just keep them away from evil maids, and you're all good.
Very informative, great info! Thank you for making this. BTW your audio is really low.
Thanks! Trying to find the sweet spot with the audio
Hi Matt. What would be your recommended JTAG model brand?
Trying to learn all of this and very overwhelmed. Are you able to access the jtag state machine this way? And command the actual registers? I’m reading how to do that, but nobody ever explains how they gain access to do that… and what they are typing the commands on/through…. Sorry if this is a stupid question
So cool! What are you going to push to it next, if anything?
might require some big time reverse engineering :D I wonder if they released the source code to the badge......
@@mattbrwn another question: can it run doom (just thought of this)
@@mattbrwn have you thrown it into Ghidra yet? Assuming it’s an ELF, Is the binary stripped?
I just got a bus pirate 3.6a and, I'm wanting to connect to a device using JTAG. The available pins on it are:
TDO,TDI,TMS,TCK,GND,RESET
Do I just connect it the same named pin, as from the bus pirate to the device? (Like TDO - TDO, TDI - TDI...etc etc for all of them). Years ago, I used uart but, I'm not seeing those connections on the board I'm trying to mess around with. I just can't seem to find a guide / tutorial that explains how to set it up for newbs.
Where I could buy the student version of the j link
How did you know to use the SI form of Mbit and not the binary form of Mbit?
Honestly I guessed 😅
You could have added the part where you locate the h/w key to crack it 😛
Does the J-link support Atmega32u4 ?
Dear sir I have a problem that the mcu has tooll0 pin reset pin vcc and ground .
How I can extract firmware from the mcu
amazing man, thank you for the cool stuff , hacked by nmat😊
What is the debugger model you are using?
xgecu tl866ii plus
Also have the newer xgecu t48
what microscope do you use for videos?
AmScope
Man I keep seeing JTAG written on different boards
I'm still a rookie, got a long waaay to go
Do u have epon firmware for Zte
Can you do the Huawei H112-372? how to get UART and JTAG.
Yes the volume is very low on your end,
Why not just hook up to the SPI NOR flash and dump that way? flashrom, ftw.
This video was specially to demo JTAG
Are you in Hawaii Oahu? I thought i saw you at Waimalu Hi Starbucks?!
Lol nope. Opposite side of country
16 megabits is 2 megabytes, which is 0x200000... Converting 20000000 decimal to hex is not 2 megabytes.
I dislike that connector style so much. The cable is expensive and the pins will bend easily.
Your video is flipped.
lol good catch. I thought I fixed that... I'm kinda new to OBS
Now to find an old xbox 🤣
The last command is not supported by jlink commander v7.88j, start here^[nmatt@ripper badge]$, ..savebin is only working , I am trying to extract stm32f103r8,,