corCTF 2021


CTF Archive.

Welcome to corCTF 2021

The first CTF organized by the Crusaders of Rust (aka Starrust Crusaders), an American and European collegiate team.

Challenge categories include pwn, rev, crypto, web, and misc.

Infra sponsored by g.co/cloud. Thanks to Binary Ninja by Vector35, Hack The Box, Trail of Bits, and Check Point Software for prize sponsorships.

Original Date: Sat, 21 Aug. 2021, 00:00 UTC — Mon, 23 Aug. 2021, 00:00 UTC
Original URL: https://ctf.cor.team/
CTFtime Entry: corCTF 2021
Organizing Team: Crusaders of Rust



Challenges

I made a chain of blocks!

Use flagCheck to input the flag you get from the challenge to get the actual flag

Author: EhhThing

Connect with SSH

Link your SSH key, then connect with: ssh hacker@pwn.college

My friend Hevr thinks I can't code, so I decided to prove him wrong by making a restricted shell in which he is unable to play squad. I must add that my programming skills are very cache money...

Use flagCheck to input the flag you get from the challenge to get the actual flag

Author: 0x5a

Connect with SSH

Link your SSH key, then connect with: ssh hacker@pwn.college

well uh... this is what you get when you make your web guy make a rev chall

Use flagCheck to input the flag you get from the challenge to get the actual flag

Author: Strellic

Connect with SSH

Link your SSH key, then connect with: ssh hacker@pwn.college

The ducks at your local pond picked up reverse engineering as a hobby thanks to their recent acquisition of the Snowman decompiler. In order to join their quacker group, you must quack their quackme!

Use flagCheck to input the flag you get from the challenge to get the actual flag

Author: FizzBuzz101

Connect with SSH

Link your SSH key, then connect with: ssh hacker@pwn.college

Warmup your crypto skills with the superior number system!

Author: Quintec

Connect with SSH

Link your SSH key, then connect with: ssh hacker@pwn.college

I heard 4096 bit RSA is secure, so I encrypted the flag with it.

Note: Please use source_patched for running the challenge and getting pwn.college flag. source binary is original source and source_patched is made for it to work with pwn.college.

Author: qopruzjf

Connect with SSH

Link your SSH key, then connect with: ssh hacker@pwn.college

lcg's can't be broken with only 2 outputs right

Author: willwam845

Connect with SSH

Link your SSH key, then connect with: ssh hacker@pwn.college

Can you sign my message for me?

Author: qopruzjf

Connect with SSH

Link your SSH key, then connect with: ssh hacker@pwn.college

To keep up with the latest trends CoR is introducing a quantum bank for all your secure banking needs. Unfortunately no one on CoR actually knows how quantum computing works, least of all me...

Author: Quintec

Connect with SSH

Link your SSH key, then connect with: ssh hacker@pwn.college

Kind of hungry... guess I'll make some fried rice. NOTE: The server has a time limit of 5 minutes.

Use /challenge/source_patched.sage.py file to run the challenge

Author: qopruzjf

Connect with SSH

Link your SSH key, then connect with: ssh hacker@pwn.college

Do you believe in the heart of the cards?

Author: qopruzjf

Connect with SSH

Link your SSH key, then connect with: ssh hacker@pwn.college

30-Day Scoreboard:

This scoreboard reflects solves for challenges in this module after the module launched in this dojo.

7-Day | 30-Day | All-Time

Rank Hacker Badges Score