Unzip the challenge (pass: cyberdefenders.org), analyze samples, and find the key. Each key looks like an email address and ends with @flare-on.com
the FireEye Labs Advanced Reverse Engineering (FLARE) team created and released the FLARE On Challenge to the community. The purpose of the challenge is to hire smart individuals interested in reverse engineering in their security blue team. They have created this series of binary challenges to test reversing skills.
This year proved to be the most difficult challenge they produced, with the lowest rate of finishers.
WARNING! Some of these challenges may be malicious. Exercise extreme caution when executing unknown code. Be safe and perform the analysis inside of a virtual machine.
With each challenge, you will find a Message.txt file that you must read to better understand what you need to do.