cyberfox Posted April 26, 2014 Share Posted April 26, 2014 Is there any way we can test a modded BIOS without flashing? a) with vmware or with boot with some USB and re-loading a BIOS from there. Anything that can be achievable with interrupt table reloading? c) I remember that in PCI storage card there was always a possibility to hijack BIOS with PCI card firmware. Because the firmware optionally injects some x86 code that can be executed by the CPU. There is technically no privilege mode restriction there. Virtually anything is possible (including but not limited to chain loading another firmware). With this theory - since my USB taps into the PCI bus, is it possible to use a OTG to push a modded BIOS in memory? This BIOS addressing/loading must be relocated to RAM (read-write) segment. If that is possible then a RaspberryPi can do the job. Quote Link to comment Share on other sites More sharing options...
lovelyallan Posted April 26, 2014 Share Posted April 26, 2014 its probably easier to just flash the bios... if it doesnt work as intended just flash backof course dont flash just any random ones... Quote Link to comment Share on other sites More sharing options...
cyberfox Posted April 27, 2014 Author Share Posted April 27, 2014 Trying with vmware or virtualbox could be real useful (at least for someone noob like me) to check that I am not flashing a random BIOS. Quote Link to comment Share on other sites More sharing options...
cyberfox Posted April 27, 2014 Author Share Posted April 27, 2014 Looks like there is a way here which I could not make it to work.VBoxManage setextradata MyVM "VBoxInternal/Devices/pcbios/0/Config/BiosRom" "c:\mybios.rom"ref: https://www.virtualbox.org/ticket/1929 Quote Link to comment Share on other sites More sharing options...
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