Uncle Pry's CTF Warmups - Episode #1

pry0cc · February 16, 2019, 11:50pm

Hey 0x00ers!

If you took part in our latest CTF (December 2018), then many of you will remember the CTF challenge that plagued everybody. It was a base62 encoded string with “-” placed randomly in the string to create a flag. This took nearly 18 hours to crack by many people.

In order to help you guys get some practice, I’m going to be releasing some challenges along the way until the next CTF, and hopefully, teach you some new little tricks that CTF developers will use to trip you up.

If you follow me on twitter, you’ll know I shared a link to this https://gchq.github.io/CyberChef/, a valuable tool in solving these sort of challenges. I would recommend playing with it a bit as it can be super useful than trying to mess with multiple online tools. You can also build ‘recipes’ which slot in together which is really nice.

I wish you luck! If you find the answer, please enclose it using the spoiler tags when you reply.

Difficulty: Intermediate

anon79434934 · February 17, 2019, 10:29pm

“Uncle Pry”

On a serious note, i am disappointed you didn’t name yourself “uncle ben” now that you had the chance.

pry0cc · February 18, 2019, 10:02am

Good job dude! Would you be able to export the recipe you used if you used Cyberchef, or the script or even the method you used to decrypt it?

pry0cc · February 18, 2019, 12:58pm

Awesome man! I’m so glad somebody else had a good time with it, I thought it was just the coolest, best-hidden secret when I saw it. And nobody seems to know about it.

anon1115000 · February 18, 2019, 1:23pm

ProTip™️: The URL keeps state via URL params so you can just link directly to it

Right click and Open in New Tab

pry0cc · February 18, 2019, 1:38pm

That awkward moment you can’t click spoiler-tagged links.

EDIT: You can use open in new tab.

pry0cc · March 18, 2019, 11:51pm

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