Zipped embedded controller firmware, judging by the ec prefix, with 105 in the name likely denoting its version. No board, model or brand is stated, so the name alone cannot tell you which machine it belongs to. At under 50 KB it matches the small size of typical EC code, which handles power-on, charging, keyboard and fans. Write it only to the matching EC chip or EC flash region after confirming compatibility, and read the existing contents first so the board can be restored.
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 @vinafix_bios. 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 →