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+++
author = "Maik de Kruif"
title = "Challenge 0 - AdventOfCTF"
date = 2020-12-02T17:20:28+01:00
description = "Challenge 0 of AdventOfCTF."
tags = [
"AdventOfCTF",
"challenge",
"ctf",
"hacking"
]
categories = [
"ctf",
"hacking",
]
+++
- Points: 1
## Description
Do you remember the flag in the teaser website?
## Solution
Use the Wayback Machine to get the teaser page.
<https://web.archive.org/web/20201112020839/https://adventofctf.com/>
When taking a look at the source we find the following comment:
```html
<!-- Ceasar worked on this you know. Tk9WSXtIRVlfMVNfVGgxU19AX0ZsYTk/fQ== -->
```
If we then use `base64` to decode this string we get `NOVI{HEY_1S_Th1S_@_Fla9?}`.
```bash
> echo "Tk9WSXtIRVlfMVNfVGgxU19AX0ZsYTk/fQ==" | base64 -d
NOVI{HEY_1S_Th1S_@_Fla9?}
```
This flag can then be submitted for the [challenge](https://ctfd.adventofctf.com/challenges#0-1).