Does updating bios remove infection
“As part of our commitment to provide technology that can preserve the integrity of devices we rely upon, we have developed a simple module for the CHIPSEC framework that can be used to verify the integrity of EFI firmware executables on potentially impacted systems.” The tool works by comparing the current UEFI to a known good copy residing on a whitelist.The firm recommends generating an EFI whitelist after purchasing a system or when you are sure it has not been infected.
Some viruses reside in the master boot sector of your hard drive, and load simultaneously with the operating system.
If it doesn't, you've got a master boot record virus. They'll claim your system is infected, and direct you to a fake virus removal website, or threaten to encrypt your hard drive if you don't turn over some sort of information.
Treat these threats with respect – your computer software is replaceable. BIOS, and other "firmware" viruses, may also infect devices that you wouldn't otherwise expect, like routers, or Bluetooth headsets.
Virus scanning software only goes over the operating system accessible areas of the hard drive.
Many can scan the Master Boot Record sectors of a hard drive. The only way to detect a BIOS virus is by trial and error and deduction.
The dump contains details on tools for exploiting zero-day vulnerabilities, including malware that can infect the firmware of computer systems, remaining invisible to the host operating system and even able to survive a hard disc reformat and OS reinstall.