Apple has just released an update to XProtect for all supported versions of macOS, bringing it to version 5311. As usual, Apple doesn’t release information about what security issues this update might add or change.

This version adds eight new detection rules, for MACOS.BANSHEE.MA, MACOS.BANSHEE.MA2, MACOS.SOMA.GEGO, MACOS.POSEIDON.B, MACOS.TIMELYTURTLE.FUNA, MACOS.TIMELYTURTLE, MACOS.TIMELYTURTLE.INDRBYSE and MACOS.TIMELYTURTLE.INDR. Banshee, Poseidon and TimelyTurtle are new names in XProtect’s Yara rules.

You can check whether this update has been installed by opening System Information via About This Mac, and selecting the Installations item under Software.

A full listing of security data file versions is given by SilentKnight and SystHist for El Capitan to Tahoe available from their product page. If your Mac hasn’t yet installed this update, you can force it using SilentKnight or at the command line.

If you want to install this as a named update in SilentKnight, its label is XProtectPlistConfigData_10_15-5311

Sequoia and Tahoe systems only

This update has already been released for Sequoia via iCloud. If you want to check it manually, use the Terminal command
sudo xprotect check
then enter your admin password. If that returns version 5311 but your Mac still reports an older version is installed, you may be able to force the update using
sudo xprotect update