Description
I’ve gotten bored of handing out flags as text. Wouldn’t it be cool if they were an image instead?
You can download the challenge files here:
- challenge.zip
The same files are accessible via SSH here:
ssh -p 55235 ctf-player@atlas.picoctf.net
Using the password 6dd28e9b. Accept the fingerprint
with yes, and ls once connected to begin. Remember,
in a shell, passwords are hidden!
Solution
Here is a better formatted version of this writeup on picoCTF Solutions website.
To get the file: wget https://artifacts.picoctf.net/c_atlas/3/challenge.zip, then unzip challenge.zip. Note: The files are also accessible with the provided ssh in the description. Use cd home/ctf-player/drop-in to get to flag.png.
Once there you can open the image and use a phone to scan the QR code and get the flag. Although it could also be done in Linux with zbar-tools.
First install the package with sudo apt install zbar-tools then to use it run this command:
zbarimg flag.png
Flag: picoCTF{p33k_@_b00_a81...}