This is the chall description :

CHALL :

Given this image with some hints “Magic Words” and “Sudo”

First check the file with file command : file [fileName], this is a JPEG file.

The creator leave some hints “There was something hidden” that means there is a file that hidden on this image, to solve this i use steghide

steghide extract -sf sudo.jpg and fill the password with “sudo” thats the m4giC w0Rd ~

Flag : CYCTF{U$3_sud0_t0_achi3v3_y0ur_dr3@m$!}