How to recover Exchange server?

This is using MS Exchange Server 2013 on MS Hyperv VM. This is the only one combined-role Exchange server. This server was found invaded by ramsonware since 5 Oct, and after much investigating, we found that it is quite certain to say that it if beyond repair. There were a daily routine backup using Veeam backup and replication, but we suspect that all the backup images for the past 2 weeks are also encrypted by ramsonware (certain files and folders). Are we able to rebuild the same exchange server by running the exch setup file?

Or else what would be the best way in order to get the exchange server back into operations.

Thanks in advance.