Download the "Virus TI Installer 5.1.7.00 for macOS" from Virus.info. The file should save as "Virus TI Software Suite 5.1.7.00.pkg". Rename the file as "virus.pkg".
Open a terminal and run the following command to copy the firmware binary to your local path:
$ pkgutil --expand-full virus.pkg virus_pkg
$ ls "virus_pkg/Core_components.pkg/Payload/Library/Application Support/Access Music/Virus TI/Common"
Virus Control.bundle firmware.bin
$ cp "virus_pkg/Core_components.pkg/Payload/Library/Application Support/Access Music/Virus TI/Common/firmware.bin" virus-ti-firmware.bin