We are reverse engineering a QNX system and we have found a small file that is uploaded to the system. It appears to be either a file system image or an uncompressed archive of some sort. We can't figure out the check-summing it uses hence I cannot edit the file. I have multiple versions of this file and they all start with the same magic bytes. I have run binwalk and magic over the file and neither return anything interesting.
We also tried mounting it within a QNX vmware image however it said it was an incorrect format. In case I've dumped it wrong I will next check the linux QNX source code to confirm.
Any ideas if this is a file system image? The header seems to list file paths/names with padding which with my lack of knowledge I assume is some kind of resource manifest.
The magic header is 0x77FA77FA
Does anyone know what this file format is?
You can download the binary here: http://s000.tinyupload.com/index.php?file_id=81688472369674028404