All instructions are in this github repository. However the hosted lab environment is on Pluralsight.com. It is free and you can create a free account at the following link:
Clicking "Create Your Free Account"
To launch the lab environment:
Once logged in search:
Defcon 32 Workshop: Dissecting and Defeating Ransomware's Evasion Tactics
Click the link to open up the lab page.
and start the lab.
It will take ~10min or less to fully start, so you want to do that soon!