Intel FIT 11.8.65.3606 in a RAR archive of 16.6 MB, far bigger than other 11.8 builds here, which suggests additional content packed alongside the tool; the name does not say what. The Flash Image Tool loads an SPI flash image, lists its regions, permits editing of ME and descriptor parameters and builds a new image, typically to restore a clean ME region. Inspect the archive contents first, use the tool only with matching 11.8 ME firmware, and keep the original chip dump before programming.
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.