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crimes

Category: Reversing

Description

I found this locked chest at the bottom o’ the ocean, but the lock seems downright… criminal. Think you can open it? We recommend chrome at 100% zoom. Other browsers may be broken.

https://plaidctf.com/files/css.74486b61b22e49b3d8c5afebee1269e37b50071afbf1608b8b4563bf8d09ef92.html

Attachments: css.html (Scrapped)

Write-up

  • Each group of 3 characters corresponds to an SVG with a small transparent rectangle
  • Utilize JavaScript to perform a brute force attack on each group of 3 characters and ensure that all transparent rectangles align with the "Correct" div tag

The solve script can be found here.

Flag: PCTF{youre_lucky_this_wasnt_a_threesat_instance}