picoCTF General Skills Guide

Lets Warm Up

Name: Lets Warm Up
Description: If I told you a word started with 0x70 in hexadecimal, what would it start with in ASCII?
Author: Sanjay C/Danny Tunitis
Tags: Easy, General Skills, picoCTF 2019
Challenge from: picoCTF 2019
Hints:
1. Submit your answer in our flag format. For example, if your answer was 'hello', you would submit 'picoCTF{hello}' as the flag.

Theory

According to the description, to get the flag we have to convert the hexadecimal `70` to text, it's just a single letter. This is pretty easy because we can just use any hex to text converter online.

Solution

Let's input the 70 to a hex to text converter, we'll remove the 0x part because the part that defines that it's hexadecimal is not needed:

HEXADECIMAL TO TEXT (online converter)

INPUT: 70

OUTPUT: p

Now let's put it in the usual pico flag format and submit it:

Submit Flag: picoCTF{p}

Check: Correct!

There we go! That's the flag.

I rated this level as "good"! :3