soal

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

launch istance

The same files are accessible via SSH here:
ssh -p 63102 ctf-player@atlas.picoctf.net
Using the password 1ad5be0d. Accept the fingerprint with yes, and ls once connected to begin. Remember, in a shell, passwords are hidden!

hint

• QR codes are a way of encoding data. While they’re most known for storing URLs, they can store other things too.
• Mobile phones have included native QR code scanners in their cameras since version 8 (Oreo) and iOS 11
• If you don’t have access to a phone, you can also use zbar-tools to convert an image to text

solve

wget https://artifacts.picoctf.net/c_atlas/2/challenge.zip

ssh -p 63102 ctf-player@atlas.picoctf.net
# pass: 1ad5be0d

• ketika login ternyata terdapat sebuah code qr
• https://qrcoderaptor.com/
  • picoCTF{p33k_@_b00_b5ce2572}

flag

picoCTF{p33k_@_b00_b5ce2572}