Hi, I have updated the bios of my lenovo x270 to the latest official version and it has changed the Mac Address of the internal network card and now the wired network does not work.
Does anyone know how I could reset the Mac I had before updating (I have it noted).

I was thinking about dumping with some software, making the change in a hex editor and flashing again, but I can't find a clear guide on how to dump and flash this Lenovo model.
Thank you.​