Reverse Trendnet TS-S402 firmware
Start reversing Trendnet TS-S402 firmware device.
Downloading the firmware from the vendor webpage
First, we need to download the firmware from the vendor webpage. I downloaded the 2015 version:
Next, unzip the firmware file:
Inspecting the binary files
Using file command we can get some information from the firmware binary files:
We can observe a lot of LZMA data, however, we got an interesting gzip compressed file as well. From this point, we can use the -x option to ignore LZMA compression and extract only the gzip file. Something like this:
binwalk -ex lzma TS-S402_FW_2_00_13.bin
-e: extraction option -x: ignore option
Accessing the _TS-S402-FW... folder, we can observe two files:
Ok, 20 file is another compressed file. Let's renaming it and unarchiving it.
Mount the filesystem
If you got an error, don't worry about that!
If we look at the hexadecimal, we can see the file format:
Install: https://github.com/devttys0/sasquatch
and
References
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