In this challenge a stream of bytes is provided. If you notice, at the bottom of the file, you can see a familiar signature which is

ff 8d ff 0e ..

It would be the one of a JPEG image if only the bytes weren’t reversed right? So why don’t we try to reverse the whole binary an every single byte?

This script up here will create an image that contains the flag: SECCON{6in_tex7}