- Download the quick_heal.mkv file.
- Play video frame by frame and take the QR code parts.
- Combine all the QR code parts into one picture.
- Scan the QR code and receive the first part of a flag (VishwaCTF{S3cur1ty.S1mpl1f13d).
- Cut the audio line from the video.
- Reduce noise and other additional layers. Leave the Morse signal only.
- Decrypt audio Morse code and obtain the second part of a flag (.5NJ0Y,C0UP0NS}).
Flag: VishwaCTF{S3cur1ty.S1mpl1f13d.5NJ0Y,C0UP0NS}.