Corona Renderer is a new high-performance CPU-based (un)biased photorealistic renderer for 3D Studio Max.
Version 1.7 is still in development and the crack may not be released for some time afterward. So here is the latest version to tide us over until that time.
Be sure to read the Readme.txt file especially if you have a prior version of Corona Renderer installed.
Crack appears to be the work of MSI from the forums. Passed scan via Malware bytes and I did not have any problems with being nagged for activation upon rendering my test scene. Provided you follow the directions in the Readme file you should be good to go.