TIL about GMASK

Honorably coming from the birth place of the internet, 4chan.

Dropping the file here in case I want to use this again lulz

https://github.com/rbfp/TIL-blogs/blob/3216004189010910be306021b83465cf77ffbe4d/crypto-catz.zip

• Hint 1

  it’s not really a zip file

• Hint 2

  exiftool

• Spoiler

  1. file crypto-catz.zip

  2. mv crypto-catz.zip crypto-catz.jpeg

  3. exiftool crypto-catz.jpeg

  4. check out know your memes

  5. google “gmask download for <OS>”

     • I was only able to find a Windows version of the program

  6. left: Negative

  7. middle: FL Mask

  8. right: Negative + flip up-down + flip right-left