Week 3

QR CyberChef Challenge

Description

Follow these steps to uncover the hidden flag using CyberChef:

1. Open CyberChef (link below)

2. Drag the provided QR code into the input field (download it in your laptop first).

3. Add 'Parse QR Code' to extract data. This step helps us read a QR code and extract the information from it.

4. Add 'From Base64' from the operations. This step turns special text (Base64) into another format.

5. Add 'From Binary' from the operations. This step changes a code made of 1s and 0s (Binary) into regular words.

6. Add 'XOR' with key: supersecret. Here, we will mix our information using a supersecret word to keep it safe.

7. Add 'From Hex' to convert the output. This step converts special numbers (Hex) into regular words.

8. Add 'Caesar Box Cipher' with Box Height: 3. We’ll arrange our text into boxes that are 3 rows high to create a secret message.

9. Find the flag in the output. Follow the steps carefully to reveal the secret flag.

 Links

• https://gchq.github.io/CyberChef/
• https://cyber.kent.ac.uk/events/CyberFirst/Girls_Development_Day_20241008/qrcode.png

Last Updated
2026-03-06 15:17:26