Questions tagged [bios]

Basic Input/Output System (BIOS) is a software that is stored on a non-volatile ROM chip on the motherboard and BIOS is the first code run by a PC when powered on.

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Does a TPM chip simply replicate the BIOS function of checking platform integrity?

According to Wikipedia, The primary scope of TPM is to assure the integrity of a platform. In this context, "integrity" means "behave as intended", and a "platform" is ...
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72 views

Could a workplace install a custom bios that gives them access to the system?

This might be the wrong place to ask this, and if so please point me in the right direction. Anyway, a family member works at a public institution where laptops are provided to the staff, which ...
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Restricting what hard drive can be used with a given machine

I have a machine running CentOS 7 with a removable hard drive. I want to restrict what hard drive can be used with the machine i.e. the machine can only be used with one disk and nothing else. I've ...
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102 views

Is it safe to download BIOS firmware from any place online?

Considering that all modern motherboards have code signature procedures in place like it is mentioned here: Is it possible for malware to be in the BIOS or in hardware? I was wondering is it safe to ...
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47 views

(When) Is it a security concern if BIOS/UEFI uses/reserves much RAM?

BIOS, UEFI and hardware's firmware ROMs are not very comforting sources for concern. On a system that I administer, a large amount of main system memory (9 of 512GB) is unavailable. Next to the ...
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Investigating HP sure start triggering security warnings

The following question belongs more to the HP forums but unfortunately I am not gaining any traction there. Please move the question to another SE if its off topic for this community. Recently I've ...
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21 views

Are 2FA options available when booting into your laptop? [duplicate]

Are there any 2FA methods that can be used when accessing the BIOS or booting into your Hard Drive? If not now then what about the future?
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140 views

Can a BIOS password along with a HDD password prevent evil maid attacks?

By definition evil maid attacks involve altering a device in an undetectable way. So if I lock the BIOS, set the HDD to boot first and put a HDD password will this prevent it? Access to the computer ...
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314 views

Is a BIOS password enough to prevent someone from hacking into my laptop if they have physical access?

Would my laptop be secure against physical access if I set up a bios password and full disk encryption ? If not then is there any way to secure your laptop from someone with physical access? How hard ...
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433 views

Can I trust a used motherboard purchased from a seller in China? [duplicate]

The ASUS motherboard in an older PC I own failed. I purchased a replacement from a vendor on eBay, shipped from China (Shenzhen). Only after receiving the motherboard did it occur to me to wonder ...
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74 views

How to detect software and hardware impairment? [closed]

How can I know if a pc has a backdoor in bios, and how to know if there is an hardware malicious impairment?
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206 views

Can BIOS virus/malware be used to steal data?

Since a BIOS isn't connected to the internet, even if your BIOS is infected with a malware (say you used a usb to flash it but with files that wasn't from the official motherboard manufacturer's site)...
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How can your BIOS be infected or hacked and Can a BIOS virus be used to “steal data”? [duplicate]

I know that BIOS can get virus but it's very rare, but it seems to me it's pretty impossible or improbable for a virus to creep into your BIOS via normal computer use. Let's say I'm using windows 10, ...
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44 views

Is it (easily) possible to deactivate a TPM in order to update the BIOS?

My assumption is that a BIOS update, while having a TPM activated, would render the computer unusable so that I could trash it unless I can revert the changes to the BIOS. 1) Is it possible to ...
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442 views

Is it safe to disable SATA ports in the BIOS to isolate the corresponding hard drives from malware?

I have three SATA hard drives that I use every day. Suppose I disable the corresponding SATA ports of these hard drives through my BIOS, add another storage device to my PC, install another instance ...
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Access SATA disk disabled in BIOS

If a remote hacker or a malware gains full root/admin rights on a system, is there any way to access another SATA disk that has been hardware connected but disabled in BIOS ? I am not sure if the ...
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250 views

Used laptop with potential BIOS/SSD firmware malware

I bought a used laptop and I'm concerned about the integrity of the firmware on the hardware and bios. I realize these types of malware are very rare. 1) My question is that if I assume that the BIOS ...
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2answers
117 views

Can you trust your computer devices to be safe to use if they have been in the hands of potential hackers? [duplicate]

Suppose you lose the bag containing your laptop along with its accessories or while travelling the police confiscate all your computer devices, can you safely use all the devices again if you format ...
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1answer
60 views

Can website exploit kits contain bootkits?

Can a website exploit kit theoretically contain a bootkit (it flashes your UEFI/BIOS)?
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94 views

Should i update the BIOS

I was reading about BIOS vulnerabilities and rootkits that have flashed malicious code to the BIOS in order to maintain access after a factory reset/operating system install or a hard drive ...
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397 views

BIOS password hash

Is it possible to find the BIOS password hash in a BIOS dump and decrypt it? For instance, a person could use flashrom Live CD to dump the BIOS with flashrom -r but how would you find the BIOS ...
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1answer
525 views

BeagleBoneBlack, TPM and uBoot

I'm using BBB in my project. I need to prevent any changes to the software running on it. I've been reading about uBoot and TPM. But if I understand everything correctly, this can't be implemented ...
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1answer
853 views

Requiring hardware key at boot-up on normal laptop

I am sure that a question like this already exists and has probably been answered. I just couldn't find any results (probably due to my inability to word my question correctly). We use laptops at ...
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Multi-Boot & BIOS Attack Vector Risks For Bitcoin Wallet Storage

I'm trying to emulate a cold storage computer for crypto assets with a multi-boot computer. If I have multi-OS boots & the 'cold storage' boot is never connected to the internet when it is booted,...
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30k views

Can a virus destroy the BIOS of a modern computer?

In the late 1990s, a computer virus known as CIH began infecting some computers. Its payload, when triggered, overwrote system information and destroyed the computer's BIOS, essentially bricking ...
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4answers
183 views

Volatile memory only computer?

I was wondering, is it possible to create a fully volatile computer, with no permanent memory at all (not even in the BIOS), that will be loaded on each boot from a read only live CD? Such that in ...
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1answer
293 views

badBIOS reflashing

This is not a has-badBIOS-pwn3d-me post, so don't worry about any paranoid rants. Having read a thorough analysis/debunking of the alleged evilware, I certainly understand that the technology badBIOS ...
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619 views

What bios passwords & settings are important to set on a Thinkpad X1 laptop?

I am just booting my new X1 for the first time, and went into the bios to set a bios password. I discovered a slew of security settings: Supervisor password Lock UEFI BIOS Settings (enabled/disabled) ...
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110 views

using sha256 to check for boot tampering

Consider the following machine: Dual Boots to two OSes, OS "A" and OS "B" OS "A" is trusted The bios is trusted. The root partition of OS "A" is encrypted OS "A" doesn't support secure boot OS "B" is ...
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2answers
956 views

How could malware survive hard disk drive format without residing in the firmware?

For example could it "trick" most partitioning/disk utility tools that it was successfully wiped, but with the malware still existing? Kinda similar to what would happen if you attempted to "clean" ...
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1k views

Potential UEFI malware from Virus Total .rom scan

I dumped my firmware on my Macbook with Darwin Dumper and uploaded the .rom file to Virus Total and it showed a huge amount of bad PE32 images (File detail tab), all of which seem to be detected by ...
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3answers
313 views

Is knowing the BIOS password of help in hacking a computer *remotely*?

Let's assume that a hacker knows the BIOS password of a computer, but can only connect to the computer over a network (Internet). The attacker has no physical access to the computer. Is knowing the ...
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53 views

If you buy a used hard drive or CPU, how to guarantee it doesn't have anything installed or running on it [duplicate]

Say you buy a used hard drive, or a computer (wondering about both cases, something that is just a drive for storage, and something that is an actual running chip). I am not interested in whether or ...
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372 views

Explain how a BIOS/UEFI infection may compromise the security of the Operating System [closed]

Explain how a BIOS/UEFI infection may compromise the security of the Operating System.
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1answer
138 views

Dumping BIOS and USB bootloader

Edward Snowden suggests to have the bootloader on a USB stick to prevent evil maid attacks and to dump the BIOS, hash it and compare it everytime. Is using Tails from a USB stick means the bootloader ...
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0answers
155 views

Can maliciously modified ACPI AML be executed without a reboot?

ACPI tables contain ACPI Machine Language, or AML, which is executed by an interpreter in the kernel at boot. Certain ACPI tables, such as the DSDT, are necessary to support hardware ACPI events such ...
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1answer
158 views

Is it risky to install a theft-protection system?

I recently bought a Dell laptop and found out that Dell recommends to install a theft-protection system called LoJack. It is a system installed on the BIOS; if the laptop is stolen, it is possible to ...
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3answers
435 views

Can BIOS/UEFI change OS code?

I know that the OS is the boss of programs (once OS is loaded). Is BIOS/UEFI the boss of the everything before OS is loaded? Can an OS be a sitting duck for any BIOS/UEFI related malware? In other ...
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1answer
409 views

Feasibility of infecting notebook BIOS with virus?

I bought my computer in 2011. From 2011 to 2015 the computer was accessible to a cousin of mine who is a developer. He doesn't work with IT security, but has more than a decade of experience ...
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1answer
245 views

Verifying that the CRTM is read-only for the purpose of trusted computing

When using a TPM to provide integrity measurements for a system via SRTM, the trusted computing base is reduced to only the TPM and CRTM. The CRTM is a component of the BIOS (specifically the ...
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Can BIOS malware be installed from OS?

Can an OS vulnerability be exploited to install BIOS/UEFI/firmware malware (such as a keylogger)? I know BIOS is a "deeper" level than the OS. I know firmware based keyloggers exist. I know they can ...
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2answers
532 views

Never believed BadBios…but do now…is there help? [closed]

After lengthy efforts to remove multiple malware issues off of 6 laptops, the strange behaviour is an accurate depiction of "badBios", something I never believed true. My current experiences have ...
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4answers
1k views

Redirect malware in BIOS or MBR can't remove it

I bought a brand new Dell Inspiron 15 7567 laptop factory sealed and new. I booted it up went through the install process and finally logged in. Opened the edge browser and went to Youtube to play ...
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265 views

Can a running kernel be protected by underlying rings, BIOS etc?

I mostly found examples the other way around: compromising the OS e.g. through a compromised BIOS or Intel ME. But are there known examples where stuff runs underneath the kernel and can be used to ...
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1answer
526 views

How would I secure my bios?

How would I fully secure my bios password/other settings from being reset/breached by pulling the battery out or by other means?
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11k views

Does adding a password to BIOS prevent malware from infecting it?

I'm looking into ways of hardening a computer's security. One of the things is the BIOS. Does adding a password to the BIOS prevent malware from infecting it? I have seen this article: Protecting ...
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3answers
9k views

How secure is Secure Erase option in BIOS?

I have been exploring data security lately and came across HDD data recovery. I now know that a format simply deletes the "pointers" to files and directories and that data is still there. The only way ...
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1answer
361 views

How to reset the BIOS without access to the motherboard? [closed]

I'm working on a pentest project (with permission of course). I'm trying to get the local hash on a computer so that I can crack it and use it as a skeleton key for other computers (all computers have ...
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1answer
1k views

How BIOS password stored internally?

Is password hashed before saving to CMOS? Which hash algorithm is used? How much storage is dedicated for passwords? What is about passwords of SSD with AES? Does BIOS save it inside drive (just ...
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1answer
142 views

What is the most secured UEFI publicly available?

It is very scary to know that spywares were installed on some largely commerciallized laptops at the BIOS level. Example: Lenovo ThinkPad spyware What UEFI would you recommand to have in order to ...