28 Nov

PicoCTF 2013 – In Hex, No One Can Hear You Scream

Points: 90

Text: While flying through the outskirts of the Ripley system, you notice a distress signal from one of the outer moons. It appears a ship has crash-landed near a 16-sided pyramid. The lone survivor, a docx file, tells you that a malicious programmer has embedded an egg in his chest and he’s afraid that it’s going to hatch. He offers his assistance if you can help find the egg.

Solution: In this challenge we have to get a key out of a docx file. A docx file is basically a zip file, we can see this when we open it in a hex editor

We can open the docx file as an archive, the key is located in kane.docx\word\media\key.png

Flag: docx_why_not_docz

For other challenge write-ups from this CTF see the overview.

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