# Full WriteUp
Full Writeup on our website: [http://www.aperikube.fr/docs/xiomara_2018_re1/](http://www.aperikube.fr/docs/xiomara_2018_re1/)



The binary is a .NET executable. We can easily extract source code with ILSpy.

The flag is ciphered with an XOR algorithm but key’s length is very small.

I wrote a small python script which performs a brute force attack to recover the flag.

Original writeup (http://www.aperikube.fr/docs/xiomara_2018_re1/).