# Full WriteUp
Full Writeup on our website: [https://www.aperikube.fr/docs/tamuctf_2019/cooper/](https://www.aperikube.fr/docs/tamuctf_2019/cooper/)
-------------# TL;DR
Copper was a network/crypto challenge. It was necessary to intercept and modify exchanges between a client and a server in order to execute commands and retrieve the flag.