> For the complete documentation index, see [llms.txt](https://blog.diefunction.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://blog.diefunction.io/ctf/technology-control-company/athackcon-ctf-2021.md).

# 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 |


---

# Agent Instructions
This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com.

## Querying This Documentation
If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter, and the optional `goal` query parameter:

```
GET https://blog.diefunction.io/ctf/technology-control-company/athackcon-ctf-2021.md?ask=<question>&goal=<endgoal>
```

`ask` is the immediate question: it should be specific, self-contained, and written in natural language.
`goal` is optional and describes the broader end goal you are ultimately trying to accomplish on behalf of the user. GitBook uses it to tailor the answer towards what is most useful for that goal.

The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.