A 17.4 MB ZIP package called Mfit 21, apparently the Intel Flash Image Tool belonging to the Management Engine version 21 toolset. No device or motherboard is named, so treat it as a utility rather than a dump for a particular board. It is used to build or modify complete SPI images, including the flash descriptor, ME region and BIOS, for example when cleaning ME before reflashing. Match the tool generation to the ME version of the chipset, and always keep a backup of the original flash.
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 @sbiosworldchannel. Enginerys does not host this file.
How to open a .zip file
Compressed archive that every operating system opens without extra software.
Back up your own chip before writing any dump, and match the full board number and revision. Flashing guide →