Steganography
A member of the staff is trying to send a message to an accomplice. He used a communication channel that every HeroCTF staff member has access to. Therefore, he had to hide it in plain sight. Can you find it?
Format : Hero{flag}
Author : Log_s
When the HeroCTF made it's annoucement, it was done using a nice animated GIF. It was published on twitter and linkdin.
If you look carefully at the animation on both sides, you could notice that a column of bits are a little bit clearer.
Buy playing the video for a few seconds, you will notice another clearer column of bits. They are the same : it's a loop.
There are 4 differents lines, that reapeat them selfs.
Let's copy the unique part, both horitontally and vertically.
You might have to change the order depending on the line you started with.
01001000011001010111001001101111011110
11011000100011000101101110001101000111
00100111100101011111011100110011001101
10001101110010001100110111010001111101
Let's put this is cyberchef and decode it.
Hero{b1n4ry_s3cr3t}