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.
Fire-Eye pleased to announce the conclusion of the fifth annual Flare-On Challenge. The numbers are in and we can safely say that this was by far the most difficult challenge we’ve ever hosted. We plan to reduce the difficulty next year, so it may be that the 114 people who solved this year’s challenge solved not only the most difficult Flare-On to date, but the most difficult Flare-On there ever will be.
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.