A new multi-platform backdoor malware named ‘SysJoker’ has emerged in the wild, targeting Windows, Linux, and macOS with the ability to evade detection on all three operating systems.
Source
New SysJoker backdoor targets Windows, macOS, and Linux

A new multi-platform backdoor malware named ‘SysJoker’ has emerged in the wild, targeting Windows, Linux, and macOS with the ability to evade detection on all three operating systems.
Source