Problem Statement
Do you like our logo?
Looking normally at the image in my hex editor, I found more than one IEND. So, it means that this image contains more than one image. Let's cross-check.
$ strings Youmaynotseeme.png | grep "IEND" | wc -l
13
$ strings Youmaynotseeme.png | grep "IHDR" | wc -l
13
So, we got 13 IEND and 13 IHDR chunks in the main datastream, and this means that our PNG main datastream has 13 PNG datasteams inside it.
I wrote this python script to split the original image further into 13 PNGs.
Looking through these 13 images obtained, all are same to original image but one, which contains the flag.
Flag: DCTF{61c9183bf4e872b61d71697891e0a4451eff0b07bcd3373d4aac94aa74baccb9f}