## p1ng (Forensics, 121p)

###ENG
[PL](#pl-version)

We are given interesting file, that looks like regular png file.


Though your browser may or may not support it. Because (surprise!) it's not regular png file - it's so called APNG file (animated png). After we discovered it (using tweakpng) we tried to unpack all the frames with available tools. Unfortunately, no ready-to-use program was able to unpack this image (i'm not sure why). So we hacked something in PHP, using stackoverflow of course:

```php

Original writeup (https://github.com/p4-team/ctf/tree/master/2016-09-09-asis-final/p1ng).