flags are stepic

CHALLENGE DESCRIPTION

SOLUTION

We can view the source code of the web, we notice that the file’s name of the flags in xx.png format, but only 1 with xxx.png

Download it and try to analyze with exiftool, strings, binwalk, zsteg, stegsolve but nothing useful here.

Look at the name of challenge, we can see stepic, do some research about it

So stepic is actually a tool to analyze just like zsteg, stegsolve...

stepic -d -i [file]