Some software producers display the MD5 sum of the kits on their download page. Make sure that the files you are downloading dont get corrupted while fetching them from their website. If there are differences in hashes, then most likely, these files get corrupted during download. If the malicious file is already known and detected by other vendors, it will be named similarly for consistency reasons. BitDefender malware researchers inspects the malware sample and run it in a virtualized environment. If not, it is assigned a name, as suggested by the CARO naming convention.”]
Source: https://www.bitdefender.com/blog/hotforsecurity/malware-trivia-episode-3/