Hackvent 2024: Hidden Easy

[HV24.HE] Grinch's Secret

This hidden was discovered while solving the day 23 challenge: [HV24.23] Santa's Packet Analyser

Solution

We take the image from the Day 23 challenge, which contains the Ogham pattern, and upload it to Aperisolve to uncover any flags hidden using steganography.

We inspect the RGB channels isolated by bits:

We notice that the LSB of the blue channel contains some additional text in the top-left corner, which is our daily flag:

Flag:

HV24{0h_w0w_y0u_4lm0st_m1ss3d_th1s_h1dd3n_fl4g}