• the chall.jpeg.zip can be unzipped using unzip chall.jpeg.zip

• the result is a jpeg image that contains a png image

• this can be seen by running binwalk -e chall.jpeg.

• to extract the data, I’ve used binwalk --dd '.*' chall.jpeg

• the resulted image is a QR code that I’ve found easy to read with zbarimg 1B16B (1B16B = filename)

NOTE: the tool can be installed on Debian based distros with apt install zbar-tools

• After reading the QR data, we’re given the flag.

zbarimg 1B16B

QR-Code:DCTF{394a6{REDACTED}b07f0}
scanned 1 barcode symbols from 1 images in 0.03 seconds