# Athackcon CTF 2021

## [Github](https://github.com/Diefunction/tcc-ctf)

A Github repository that contains all challenges.

## Environment setup on Ubuntu

### Requirments

* Install docker-engine
* Install docker-compose

Install Docker and docker-compose.

```bash
# Update apt package index
sudo apt update
# Allow apt to use repository over HTTPS
sudo apt install \
    apt-transport-https \
    ca-certificates \
    curl \
    gnupg \
    lsb-release
# Add Docker's official GPG key
curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo gpg --dearmor -o /usr/share/keyrings/docker-archive-keyring.gpg
# X86_64 / amd64
echo \
    "deb [arch=amd64 signed-by=/usr/share/keyrings/docker-archive-keyring.gpg] https://download.docker.com/linux/ubuntu $(lsb_release -cs) stable" | sudo tee /etc/apt/sources.list.d/docker.list > /dev/null

# Update apt package index
sudo apt update

# Install the latest version of docker engine and containerd.
sudo apt-get install docker-ce docker-ce-cli containerd.io

# Download docker-compose version 1.29
sudo curl -L "https://github.com/docker/compose/releases/download/1.29.2/docker-compose-$(uname -s)-$(uname -m)" -o /usr/local/bin/docker-compose

# Apply executable permissions to the binary
sudo chmod +x /usr/local/bin/docker-compose

# Add user to docker group
sudo usermod -aG docker $(whoami)
```

Reboot the machine.

```
sudo reboot
```

Install git.

```bash
sudo apt install git
```

Clone the repository.

```bash
git clone https://github.com/Diefunction/tcc-ctf.git
```

After cloning the repository change the current directory to the repository directory.

```
cd tcc-ctf
```

Builds Docker images from Dockerfiles.

```
docker-compose build
```

Create and start containers

```
docker-compose up
```

## Challenges

| Name                                                                        | IPAddress      | Flag                  |
| --------------------------------------------------------------------------- | -------------- | --------------------- |
| [Trust](https://blog.diefunction.io/ctf/technology-control-company/trust)   | 127.0.0.1:8000 | /usr/src/app/flag.txt |
| [Config](https://blog.diefunction.io/ctf/technology-control-company/trust)  | 127.0.0.1:8001 | /flag/flag.txt        |
| [Extend](https://blog.diefunction.io/ctf/technology-control-company/extend) | 127.0.0.1:8002 | /usr/src/app/flag.txt |
| [Poison](https://blog.diefunction.io/ctf/technology-control-company/poison) | 127.0.0.1:8003 | /usr/src/app/flag.txt |