Given two files.
$ exiftool wallpaper.jpg
XP comment property contains base64 string. Decode it.
Use Hashkiller to obtain plaintext. You can obtain ‘j0k3r’, use as password for the clue.zip.
Clues are in history.txt fles. Read a while, you’ll get rarity in history.txt file.
Collect all uppercase charachter as string.
To extract jokerBrangkas.zip, use that string as password.
You will get .txt file that contain flag.
The flag is