New SysJoker Espionage Malware Targeting Windows, macOS, and Linux Users

A new cross-platform backdoor called “SysJoker” has been observed targeting machines running Windows, Linux, and macOS operating systems as part of an ongoing espionage campaign that’s believed to have been initiated during the second half of 2021.
“SysJoker masquerades as a system update and generates its [command-and-control server] by decoding a string retrieved from a text file hosted on