Challenges

'Perhaps I shouldn't have followed that rabbit?' you wonder as you fall in a seemingly bottomless hole. Luckily, there is some music to kill the time.

https://www.youtube.com/watch?v=5NQzmGYWk6w

https://imaginaryctf.org/r/0201-rabbithole.py nc 67.159.89.33 18000

You thought we were done with the phobias?

https://imaginaryctf.org/r/5937-enc.py

I forgot not only my password, but also my username... Again...

https://like-it-or-not.031337.xyz/

Our company thought that keeping our moving target defense software closed source would deter hackers, sadly the controller was easily discovered. I was able to convince the board to implement an encryption and even make the software public, to show malicous actors our confidence in moving target defense and our software. I even implemented passwords and signing keys!

https://imaginaryctf.org/r/1829-server.py http://67.159.89.33:9002/

I forgot not only my password, but also my username...

https://forgotten-name.031337.xyz

There's always a method to my madness :rooDevil:

https://method.max49.repl.co/

My friend doesn't think you can display the contents of a file without cat. Can you prove him wrong?

nc 67.159.89.33 15000 https://imaginaryctf.org/r/7FF4-app.py

I wanted to create my own VM for once. Luckily I know that printf is turing complete and can use that as interpreter so I don't have to write one myself! (Not intended to be pwned)

See the attached hello world program for an example. Enter %1$254s%9$hhn to turn on debug mode.

nc spclr.ch 1390 https://imaginaryctf.org/r/45B3-interpreter https://imaginaryctf.org/r/CA7A-helloworld.txt https://imaginaryctf.org/r/7728-interpreter.c

I made this program that seems to be pretty unoptimized... Could you optimize it for me? I'm sure it would go quicker if you optimized it.

https://www.max49.cf/cdn/unoptimized.py

Truly a reversing challenge, in more ways than one.

https://imaginaryctf.org/r/4E36-aibohphobia

Can you rotverse my file?

https://imaginaryctf.org/r/69D8-rotversing.py

I just wanted my picture to be save, so I encrypted all the RGBA values with AES-ECB using a random string... Then, I didn't see it coming, I forgot that string. At least I remember that it was exactly 1000 pixels wide.

https://imaginaryctf.org/r/00C4

Have you seen how volatile bitcoin is? Anyway, we arrested the bad guy and got a memory dump of the pc. We need the flag. I think he stored it in a file called 'flag.txt'. Not sure what folder, but that's enough.

https://imaginaryctf.org/r/183D

Here's a picture of some nice colors! These colors also happen to make up the flag! If only there was something about these colors that we could use to retrieve the flag :rooThink: ... (If the flag you get looks a little off, try a different tool (if you choose to use one))

https://www.max49.cf/cdn/colors.png

BagelBot is the greatest gambling bot ever to be made. It's so good, that BagelBot is giving everyone 1,000 free bagels when to anyone when they initialize a profile with b.bal to celebrate its release! Try it out by dming the bot b.help to see a list of commands! (I promise this is less guessy than ImaginaryBot v2)

discord bot: <@880196505477206027> bot invite: https://discord.com/api/oauth2/authorize?client_id=880196505477206027&permissions=0&scope=bot https://github.com/max-49/BagelBot

just cat the flag

https://imaginaryctf.org/r/C79A-flag

Welcome to Round 14! DM flags to me to get points, and rise up on the leaderboard! Have fun and enjoy Round 14!

ictf{Round_14_but_easier_challenges!}

Oh no, roo discovered the Fisher-Yates shuffle and decided the shuffle all my good advice. Please help me restore everything so that I know what I learned about classical cryptanalysis?

Note: The solution will give you instructions on how to get the flag, there will be no ictf{} in the plaintext directly.

• https://imaginaryctf.org/r/BDB3-shuffled.py
• https://imaginaryctf.org/r/6C23-out.txt

I made sure that there are no more overflows in my secure flag store! Now you will never get my flags!

nc spclr.ch 1240 https://imaginaryctf.org/r/372D-vuln-v2.c https://imaginaryctf.org/r/A6E0-vuln-v2

I made the safest flag store in the world!

nc spclr.ch 1300 https://imaginaryctf.org/r/681A-vuln.c https://imaginaryctf.org/r/293C-vuln