How To Verify Download Checksum Windows 10 Extra Quality

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Astri Hirons

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Jan 25, 2024, 10:05:32 AM1/25/24

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This produces a hash that is shorter than what I need. I tried different algorithm names, but I still cannot match the posted checksum. Since this is the first time I try this, my assumption is that I am doing something wrong. Perhaps I should specify a different algorithm (not "md5" or "sha1") - but which checksum algorithm generates a 64-char value?

how to verify download checksum windows 10

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Since this is the first time I try this, my assumption is that I am doing something wrong. Perhaps I should specify a different algorithm (not "md5" or "sha1") - but which checksum algorithm generates a 64-char value?

I'm on a Windows machine and I want to run a checksum on the MySQL distribution I just got. It looks like there are products to download, an unsupported Microsoft tool, and probably other options. I'm wondering if there is a consensus for the best tool to use. This may be a really easy question, I've just never run a checksum routine before.

for sure the certutil is the best approach but there's a chance to hit windows xp/2003 machine without certutil command.There makecab command can be used which has its own hash algorithm - here the fileinf.bat which will output some info about the file including the checksum.

I have to utilize the offline compiler to receive updates for Visual Studio 2017 Professional. Is there a way to verify the hash value or some sort of checksum before installing? I can't seem to find any available hash values on the Microsoft website.

Modified:
We suggest you could use '-verify' argument to check if offline installation files are either missing or invalid. It will read some important metadata in the offline cache supplied. The commnad: "vs_professional.exe --layout --verify".

Basically, FCIV calculates MD5 or SHA-1 hash values for files and outputs them either to the screen or to an XML file. It can also compare files to those checksums saved in XML and tell you if anything differs or is missing. A demo is worth a lot of words, so let's see it in action!

-wp means we're saving only the file names in the XML file, not their full path
-sha1 specifies to calculate a SHA-1 hash on each file. The default is MD5.
-xml means output the checksums to an XML file, in this case the G:\hashdb.xml that follows it.

-v means we're now in verification mode, so it will verify checksums in the current directory against those in the XML file
-sha1 again specifies we're using the SHA-1 hash
-xml is the file we're comparing our calculated checksums against

Others may raise the point that both the MD5 and SHA-1 checksums both suffer from collision vulnerabilities and there are better alternatives out there that this application doesn't support. They're totally correct, but it's also important to remember that we're using these checksums to detect changes, not for cryptography or protecting secrets. Any form of verification is better than none, and for my purposes FCIV has proven to be very helpful.

In reality, Web of Trust is kind of hard to implement; since the trusted entity is relative to anyone, this raise a question on how to securely transfer the trusted entity signature verifying public key to your computer.

The SHA256SUMS file contains checksums for all the available images (you can check this by opening the file) where a checksum exists - development and beta versions sometimes do not generate new checksums for each release.

Depending on your platform, you may or may not need to download the public key used to authenticate the checksum file (Ubuntu and most variants come with the relevant keys pre-installed). The easiest way to find out if you need the key is to run the authentication command:

If you get no results (or any result other than that shown above) then the ISO file does not match the checksum. This could be because the ISO has been altered, or it downloaded incorrectly - either way you should download a fresh ISO from a known good source.

- Underneath links to download Malwarebytes, could you provide a checksum (or link to a checksum) so users can check the file hasn't been tampered with? Also instructions explaining what checksums are and how to check them would be useful for less tech-savvy users.

I'm not 100% sure but the checksum for CCLeaner and Mint would probably have been the same one as the file was built and served from their own systems. If that were the case the checksum would not matter as it would match what their website said but we get where you're coming from on this.

Additionally, the file's digital signature, plus countersigning, may be sought & examined. This holds true for the executables, drivers and DLLs that constitute the modules and other internal files within the installed product. Independently you may also verify the digital signature(s) through the use of Microsoft's Sysinternals' Sigcheck, Windows File Explorer and other methods.

I'm not 100% sure but the checksum for CCleaner and Mint would probably have been the same one as the file was built and served from their own systems. If that were the case the checksum would not matter as it would match what their website said...

I may have misunderstood what I've read online about both breaches, but I thought that in both cases the hackers had replaced legitimate files with malicious versions, in which case I don't understand why the checksums would have matched. And even if what you're saying is correct, some sites use GPG to ensure that users know that the checksum files were definitely created by the software developer/company in question and not the hackers.

That's probably the case and while I do use VirusTotal, I often comes across false positives. When I do, I contact the AV/AM companies in question and ask them to check if their "hit" is a false positive. Most of the time it is and I get a reply saying so. Some companies just ignore me though for reasons I fail to understand. Even VT will tell you that just because a file is not detected as malware by every scanner on VT, it doesn't necessarily mean the file is clean. It could be, but it's also possible that it's some type of malware that isn't yet detected by any of the scanners on VT. Conversely, just because scanners on VT identify a file as maware doesn't mean it is, it could be a false positive. This is the problem with any AV/AM product. And why I consider checksums vastly superior.

Of course, but I'm a horse that DOES want to drink. Just because many users won't check checksums (even when their usefulness is explained) is no reason to not provide checksums for people who ARE willing to check them, is it?

With regards to a checksum printed on a webpage vs the checksum of a download, if a malicious third party were able to hack into the hosting servers, it is very likely they could just as easily (if not more so, since hosting servers are likely more guarded/secured against outside attacks/intrusions) hack the webpage where the checksum is printed and just change it, making the checksum of the file being downloaded appear to be legitimate even if it is not.

"With regards to a checksum printed on a webpage vs the checksum of a download, if a malicious third party were able to hack into the hosting servers, it is very likely they could just as easily (if not more so, since hosting servers are likely more guarded/secured against outside attacks/intrusions) hack the webpage where the checksum is printed and just change it, making the checksum of the file being downloaded appear to be legitimate even if it is not."

Well couldn't Malwarebytes simply make the page that lists all the checksums for the various downloads read-only and put an internal warning system in place if anyone tries to alter the permissions of the page from read-only and tries to change any of the checksums? Also any page that displays checksums should be very strongly secured against intrustion. And as I said before, many companies (especially those that create Linux software) use GPG so that users know that the checksum is legit and hasn't been tampered with. I'm sure people could think of additional ways to ensure the valdity of checksums, e.g. if someone accesses a page that lists checksums then all those checksums could be internally checked against a record of them on a Malwarebytes computer that doesn't have internet access and a message could be displayed that says "These checksums confirmed correct as of [date], [time]".

Digital signatures are superior to checksums because they are more versatile and more secure against tampering. If an installer or any of its contents have been altered in any way by a third party it breaks the digital signature and the installer itself would no longer be digitally signed. You wouldn't need to install the application or run the installer to know that it is invalid. Windows would tell you the moment you tried to execute it that the installer you're trying to run is not digitally signed. That alone provides verification that the installer is legitimate.

As for safeguarding the page with the checksums printed, you're talking about a public facing website which must allow for a large amount of traffic from various sources. They also need to be able to edit the page any time a new version is released, so making it read-only isn't a solution. Anyone who can get into the backend of the site hosting the page with admin permissions would be able to edit it, and in fact I believe this is how CCleaner and others had their files infected in the first place. The use of checksums would not have prevented it. Companies must simply guard their digital signatures carefully and restrict access to their signing machines, and this is what Malwarebytes and others do, and so far there have been no instances where any of their files were maliciously manipulated, altered or replaced, even though malicious hackers have tried many times to infiltrate or DDoS Malwarebytes' servers.