Hexable writeup.

SUMMARY.md

@@ -25,6 +25,7 @@
   * [Fzz Buzz 2 \[200 points\]](/programming/fzz-buzz-2-200-points.md)
   * [Match Me \[300 points\]](/programming/match-me-300-points.md)
 * [Reverse Engineering](reverse-engineering.md)
+  * [Hexable \[25 points\]](/reverse-engineering/hexable-25-points.md)
   * [Useless Python \[50 points\]](/reverse-engineering/useless-python-50-points.md)
   * [Phunky Python II \[115 points\]](/reverse-engineering/phunky-python-ii-115-points.md)
   * [Hex QR \[200 points\]](/reverse-engineering/hexqr-200-points.md)

reverse-engineering.md

@@ -2,7 +2,7 @@
 
 This category challenges your deductive ability to use a program's behavior and output to figure out its input, thus reversing the original behavior of the program. The reverse engineering challenges for this contest are:
 
-* Hexable \[25 points\]
+* [Hexable \[25 points\]](/reverse-engineering/hexable-25-points.md)
 * Phunky Python I \[30 points\]
 * [Useless Python \[50 points\]](//reverse-engineering/useless-python-50-points.md)
 * [Phunky Python II \[115 points\]](//reverse-engineering/phunky-python-ii-115-points.md)

reverse-engineering/hexable-25-points.md

@@ -0,0 +1,22 @@
+# Hexable - 25 points
+
+I tried to hide a flag sneakily, can you find it? [Download](https://github.com/EasyCTF/easyctf-2017-problems/blob/master/hexable-autogen/hexable)
+
+### Solution
+
+The challenge file was a small executable of 235 bytes:
+
+```
+$ file hexable
+85b33e8a48a9e129d23c20483b4b12cd1d199708_hexable: ELF 32-bit LSB executable, Intel 80386, version 1 (GNU/Linux), statically linked, stripped
+```
+
+[strings](https://en.wikipedia.org/wiki/Strings_%28Unix%29) was lucky and found a flag in plaintext.
+
+```
+$ strings -a hexable
+Can you find the flag?
+easyctf{PT4z0pqN1xQuXm}
+```
+
+### External Writeups