Reading Time : 1min

TJCTF 2022 Spongebob

TJCTF 2022 Forensics spongebob

File: image.png download

Challenge/Competition: TJCTF 2022 - spongebob

Challenge Discription: TJCTF is really cool and spongebob thinks so too. So cool in fact...wait a minute, isn't the meme usually 4 squares???

File

we got this png image file.

As mentioned in discription fourth square of the meme is hidden. but we can see a little bit of it.

I found out that its size in the header was not defined correctly.

To Adjust that I am going to use a software called “TweakPNG”
lets open this image in the software.

now right click on IHDR chunk and edit the chunk.

In the popup window change Height from 778 to 1000 and press OK.

go to File>Save As… and save the file with any name.

Now here we have our complete Image visible with flag.

tjctf{such_pogg3rs_ctf}