Remember that real hackers always use onion to hide themselves.
Author: @sioel0
The flag was hidden as a comment of the immage, it was "hex-enocoded".
You just had to use file onion.jpg to find out the comment and then you
had to convert it from hex to ASCII.
havceCTF{re4l_h4ck3rz_e4t_on10ns1!1!}