Intel FIT build 11.8.50.3460, distributed as a 5.07 MB RAR, one of the earlier 11.8 Flash Image Tool versions in this collection. FIT lets you open a BIOS dump taken from the SPI chip, see the region layout and ME configuration, replace the ME region with clean firmware and produce a ready-to-flash image. It belongs to Intel's ME System Tools. Later 11.8 builds may be preferable for newer ME firmware, so match versions where possible, verify the output size and keep the original read as a fallback.
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.