Consumer ME firmware region, version 15.0.23.1706, built for the LP (low-power) PCH at stepping B and marked as a production release. The EXTR label means it was extracted from a firmware image rather than supplied as a clean stock region. Its 2.99 MB size is only the ME portion, so it must be inserted into a complete BIOS dump at the ME region offset before an SPI programmer can write it. Check that the board really uses an LP chipset, since H and LP images are not interchangeable, and save the original flash 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 @sm_intel_repository. Enginerys does not host this file.
How to open a .bin file
A raw, byte-for-byte image of a flash chip: the main BIOS / UEFI, the embedded-controller (EC) firmware, or both.
Back up your own chip before writing any dump, and match the full board number and revision. Flashing guide →