XLoader is being offered on an underground forum as a botnet loader service that can recover passwords from web browsers and some email clients. XLoader emerged last February and has grown in popularity, advertised as a cross-platform (Windows and macOS) botnet with no dependencies. Researchers say that X loader is stealthy enough to make it difficult for a regular, non-technical user to spot it. The malware is likely to be more prevalent given that it targets the two most popular operating systems.
Source: https://www.bleepingcomputer.com/news/security/xloader-malware-steals-logins-from-macos-and-windows-systems/