Intel FIT version 11.8.79.3722 packed as a 5.53 MB RAR. The Flash Image Tool is Intel's utility for building SPI flash images, letting a repair technician load an existing dump, inspect its region map and Management Engine configuration, insert a clean 11.8 ME firmware and save a new binary. The resulting file is written with an external SPI programmer. Before flashing, double-check that the board's ME firmware belongs to the 11.8 branch and that you have saved a full copy of the chip's original contents.
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.