Rating:
# Cheese This
Data rot usually is a problem with images. When opening an image with any program the filetype should get detected by the first few bytes of the image.
Opening this however just showed the following:
Having a look at the hex of the aleged image we found that the first few bytes went missing (yellow highlighted) and that the image is in fact a png (green highlighted)
Replacing those emty bytes with correct ones
revealed this image:
With a litte trial and error we managed to get the flag correctly:
### Flag: `X-MAS{You_are_g00d_w1th_gu3551ng}`
