If you suspect that your BIOS is infected (BadBIOS?), I could only suggest doing a hardware ISP flashing with one of the flashrom-supported programmers (i.e. green PCB ch341a) and a test clip like SOIC8 (to be able to attach to a chip without any soldering) while the board is turned off of course. This should be the most reliable. Before flashing a new known good BIOS image that you might obtain i.e. by extracting from a manufacturer's update utility, please dump the previous contents with a programmer: so that you'll be able to recover from it just in case, and maybe even look through it for any hard evidence of a BIOS virus to share it with the community (if that's really true, could be quite interesting for research purposes). Also I copy this message to a flashrom mailing list, in case someone else could also advise you.
On Wed, Apr 7, 2021 at 2:05 PM Rahngue NGARIERA <youeto...@gmail.com> wrote: >> >> Hi Mike. I didn't mention it in my previous email, but I used also flashrom >> 0.9.6 on Ubuntu 14.4 Which failed on both Probe and Read with "Hardware >> sequencing was requested but the flash descriptor is not valid. Aborting". >> While using version 0.9.4 (on DOS) I did both Probe and Read. As You said, >> the 2 chips FlashRom 0.9.4 found (AT25DF081A and AT26DF081A) are the same >> and one chip. And checking on the main board I did see that chip. It's >> AT26DF081A. I did try to read on FlashRom 0.9.4 (on DOS) using the -c >> parameter with AT26DF081A first (as in -c AT26DF081A) but that failed. Then >> just to see, I tried to read with -c AT25DF081A ( since 0.9.4 was seeing two >> chips). But it also failed. I'm sending you again the Probe log and the Read >> logs using FlashRom 0.9.4 : READ1.TXT (AT25DF081A) > > and READ2.TXT (AT26DF081A). > > FlashRom 0.9.6 (Ubuntu14.4) and FlashRom 1.2 (on DOS) both failed whether > reading or probing even with -c AT26DF081A ( -c AT25DF081A) with the same > message at the end saying that flash descriptor is invalid. > This Dell system I want to read from, I think, has its bios infected. When > It comes to bios, I prefer to operate from DOS: I think it's safer and maybe > help avoid any action from the virus. > Please Mike, what do I do for FlashRom to successfully read this chip? > I need to confirm if this bios chip is infected. > Thanks for your help, > Etonam. -- Best regards, Mike Banon Open Source Community Manager of 3mdeb - https://3mdeb.com/ _______________________________________________ flashrom mailing list -- flashrom@flashrom.org To unsubscribe send an email to flashrom-le...@flashrom.org
