Verify | Forensics | picoCTF 2024

Description:
People keep trying to trick my players with imitation flags. I want to make sure they get the real thing! I'm going to provide the SHA-256 hash and a decrypt script to help you know that my flags are legitimate. You can download the challenge files here:
[challenge.zip]
Hints:
1) Checksums let you tell if a file is complete and from the original distributor. If the hash doesn't match, it's a different file.
2) You can create a SHA checksum of a file with sha256sum file or all files in a directory with sha256sum directory/*
3) Remember you can pipe the output of one command to another with |. Try practicing with the 'First Grep' challenge if you're stuck!