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Recent Writeups


Sequel Sequel

07/24/2022

I must confess I have never connected to a sequel database in a gui before.


Button

07/24/2022

How do we deal with lots of html.


Ogre

07/19/2022

Portainer is a nice web ui for doing things with docker.


Flagbot

07/19/2022

Discord Bot exploitation is rare but it exists.


vsCaptcha

07/10/2022

captcha looks solvable programatically. oh no deno


Survey

07/10/2022

ez


HSGTF

07/08/2022

tldr we should organize our past ctf conversations better.


Tunnels

06/10/2022

Catch b40m1k3


OTP

06/10/2022

the one-time pad (OTP) is an encryption technique that cannot be cracked Wikipedia


Markdown++

06/10/2022

Parsers are fun especially when they're buggy (ahem ahem ahem DOMPurify).


Hacking

06/10/2022

Help Eljmike organize his hacking contest!


Hacking Part 2

06/10/2022

Eljimike is back at it again with his weird hacking contests. Can you help him this time?


Eunectes Murinus

06/10/2022

Oh look it's a python compiled file that guards a flag. Can we decompile?


Baby-RSA

06/10/2022

random useless information


Parity

05/12/2022

Check your parity.


Dreams

05/11/2022

Sometimes I want to just stay in my dreams.


Secure Horoscope

05/08/2022

Our horoscope developers have pivoted to a more security-focused approach to predicting the future. You won’t find breaking into this one quite so easy!


Oracle

05/08/2022

An oracle is a black box in a Turing machine. You can run it but how do you inspect it?


Oil Spill

05/08/2022

Darn, these oil spills are going crazy nowadays. It looks like there's a little bit more than oil coming out of this program though...


Internprise Encryption

05/08/2022

Our new intern Dave encrypted all of our important company files with his homemade "military grade encryption scheme" to try and improve company security...


Bit Flipping Machine

05/08/2022

We just made a machine that can remotely flip bits to change the memory contents of enemy computers. You are tasked with demonstrating the power of this machine...


morse-code

03/29/2022

Morse code is well known. Can you decrypt this?


credstuff

03/29/2022

We found a leak of a blackmarket website's login credentials. Can you find the password of the user cultiris and successfully decrypt it?


basic-mod2

03/29/2022

A new modular challenge!


basic-mod1

03/29/2022

We found this weird message being passed around on the servers, we think we have a working decryption scheme.


Operation Orchid

03/27/2022

Sleuth kit on disk image


Wizardlike

03/16/2022

Do you seek your destiny in these deplorable dungeons? If so, you may want to look elsewhere. Many have gone before you and honestly, they've cleared out the place of all monsters...


Unpackme.py

03/15/2022

Can you get the flag? Reverse engineer this Python program.


Patchme.py

03/15/2022

Can you get the flag? Run this Python program in the same directory as this encrypted flag.


file-run2

03/15/2022

Another program, but this time, it seems to want some input. What happens if you try to run it on the command line with input "Hello!"?


file-run1

03/15/2022

A program has been provided to you, what happens if you try to run it on the command line?


Bloat.py

03/15/2022

Can you get the flag? Run this Python program in the same directory as this encrypted flag.


Safe Opener

03/15/2022

Can you open this safe? I forgot the key to my safe but this program is supposed to help me with retrieving the lost key. Can you help me unlock my safe?


GDB Test Drive

03/15/2022

Can you get the flag? Here's the test drive instructions: