STM32CubeWB firmware package contains the firmware binary files which may be needed at the firmware update steps of this activity. The files that you need are:
–Firmware Upgrade Services (FUS) upgrade firmware. The file name is stm32wb5x_FUS_fw.bin
–Bluetooth LE Stack binary file. The name of the file is: stm32wb5x_BLE_Stack_full_fw.bin
You can download the package from the product page which is explained in the Step 2 of this cookbook.