Welcome to the DEVs git Capture the Flag (CTF) competition!
If you can read this, then you've probably already done most of the setup, but please read the next section to make sure.
To make sure that Git is installed, run the following command in your terminal:
git --versionYou should get back something like git version 2.32.0.
If you cannot run this command, please install git on your machine.
If you don't want to bother running the installation, consider using an online tool like repl.it to setup a bash environment, or clone the repository from GitHub.
Make sure that you have signed up for a GitHub account. This is required for the CTF (and probably for your degree at some point).
For Challenge 9, you'll need to be a collaborator on the GitHub repo. In order to get this, do the following:
- Send an email to
devs.ctf@gmail.comfrom the email tied to your GitHub, and include your GitHub username in that email. - Accept the invitation email that GitHub sends you.
You'll also need the ability to link your machine to your GitHub account. The easiest way to do this is:
- Clone the repository using HTTPS:
git clone https://github.com/<username>/<repo_name>.git - When pushing code, it will prompt you for your GitHub username and password.
Note that if you've setup two factor authentication, you'll probably have to clone using SSH and then setup your SSH keys. See here for a step-by step guide for how to do this.
The CTF challenge will be run online at this website.
The CTF will only start after the presentation, so the questions won't be live until then.
There will be DEVs exec team members walking around, who can help with any questions that you may have.
Additionally, there are the resources from the slides, and anything you can find on Google.
You are welcome to work in teams, but then you'll have to figure out how to split the prize.
Some CTF challenges will offer hints for how to complete them. These hints will often come at a cost (points), but sometimes they are free, so it is worth checking.
A hint costs half the amount of points that completing the challenge would give you. e.g. an "Easy" challenge gives you 2 points, and it's hints will cost you 1 point.
A flag is simply a random string of 16 uppercase characters, e.g. JWGDXBBHNSGDKMBL (this isn't a valid flag, unfortunately).
The flags are hidden around this git repository, and the challenges describe how to earn these flags.
Flags must be captured in order to earn points. The flags are captured by copy-and-pasting them into the appropriate field on the CTF website. Each challenge has a unique flag, so you'll have to complete each challenge in order to get the flags.
Capturing flags will grant you points, which give you a standing on the leaderboard.
The different challenges have different difficulty levels, which correspond to different amounts of points
- The 6 "Easy" challenges are worth 2 points each
- The 5 "Medium" challenges are worth 4 points each
- The 3 "Hard" challenges are worth 8 points each
1st place: Google Home Mini
2nd place: DEVS Hoodie
3rd place: DEVS T-Shirt
Challenges consist of 1 or more files:
- A
README.mdfile that describes the challenge - A flag, matching the pattern described above
- Additional files that are part of the challenge
Each challenge is on its own git branch, where challenge number x will be on branch challenge/x
The very first challenge! If you can read this file, you can complete the challenge already.
Simply copy the flag below and put it into the CTF platform to get your first point!
YXEZPSELMPYQJKWJ
The first real challenge: checkout the challenge/1 branch and view the README.md file.