Intel FIT 12.0.49.1536 supplied as a 6.25 MB RAR. The Flash Image Tool lets a technician take an SPI image read from the board, inspect regions and ME options, replace the Management Engine firmware with a clean one and save a rebuilt binary for flashing with a hardware programmer. It is part of Intel's ME System Tools package for the version 12 branch. Note that an identically sized archive in this collection is labelled 11.0.49.1536, so check the version inside before use, and always save the original dump first.
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.