Malware Evasion Encyclopedia is broken into different categories of information that a malware will use to detect if it is running under a virtualized environment. Malware may check if it’s running under virtualized environments such as VirtualBox and VMWare. Check Point Research says the value of sharing with the community is greater than the risk of malware authors using the encyclopedia. The encyclopedia is just the ‘face for a GitHub account with all the info. Anyone may submit pull requests and add his own technique if he spots one so the encyclopedia can be a valuable tool.
Source: https://www.bleepingcomputer.com/news/security/new-evasion-encyclopedia-shows-how-malware-detects-virtual-machines/