How to unlock and decompile Cisco switch firmware

Download firmware , Such as image_tesla_hybrid_2.5.0.83_release_cisco_signed.bin

1. Download and install binwalk

brew install binwalk

2. Download and install lzop

brew install loop

3. Use binwalk Untie the file

binwalk -eM   image_tesla_hybrid_2.5.0.83_release_cisco_signed.bin

4._image_tesla_hybrid_2.5.0.83_release_cisco_signed.bin.extracted Find the analysis file you need , Further decompression according to the division , Such as cpio The file of , We can use cpio To decompress

cat _image_tesla_hybrid_2.5.0.83_release_cisco_signed.bin.extracted/_E0DE0.extracted/_90B6E0.extracted/0.cpio | cpio -i

5. Then you can get some js, elf And so And configuration, etc

6. have access to ida To analyze or other disassembly tools to analyze , Also have js and python Something like that , You can also have a look at .