Create 095-brachiosaurus.md

Author: Eleng555

095-brachiosaurus.md

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+# 95 - Brachiosaurus
+
+*Written by Michael Zhang, Writeup by MegaAbsol*
+
+## Problem
+
+Here's something a bit harder.
+
+<img src = "http://www.easyctf.com/problem_data/brachiosaurus/brachiosaurus.jpg"></img>
+
+## Hint
+
+Is this jpg really a jpg?
+
+## Solution
+
+Since this seems to be a steg problem, we open it in a hex editor. I used HxD. Scroll to the bottom of the file, and we see lots of "not suspicious" strings, as well as PK's (50 4B). PK is a zip file. We find the first instance of "PK" in the plaintext, and copy everything from there. We take the copied text and make it into a zip file. Looking into our new zip file, we see a "not suspicious" folder filled with .SHORT.OUT files, from 1-25. There also is a "whatAFineKeyThisIs" file. This seems like something, so we look into it.
+
+In this file, it says:
+
+    my favorite numbers are seven and three.
+    gaf cnrvp qnjkfs hz zfufqgffq
+    
+The bottom seems suspicious, and looks like some kind of cipher. Plugging it into [quipqiup](http://quipqiup.com/), we get
+    the lucky number is seventeen
+
+We then look into file 17. It seems like a bunch of meaningless text, but when we CTRL+F "answer," we find:
+    ANSWER4Y0UREFF0RTSISC1PH3RSANDKRYPT0
+
+## Flag
+
+C1PH3RSANDKRYPT0