Intel FIT 11.6.20.1221 in a 5.00 MB RAR archive, from the 11.6 branch of the ME System Tools. The Flash Image Tool is used to load an existing SPI flash image, inspect its regions and ME settings, substitute a clean ME firmware and generate a rebuilt image. Repair technicians then write the result to the SPI chip with a programmer to clear ME corruption. Because FIT branches are not interchangeable, confirm the board runs 11.6 ME firmware, ensure the image size matches the chip, and keep the original dump.
The button opens the matching file on RM Schematics, or a source page if it is not catalogued there yet. The original attachment is from @mfittool. Enginerys does not host this file.
How to open a .rar file
Compressed archive — the usual wrapper for a schematic + boardview pair or a BIOS + EC set.