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A file’s hash value is a signature for that file that uniquely identifies it. If a file’s contents change, its hash value will also change. You can use the hash value of a file to know whether it has been modified or altered. You can also cross-check the hashes of a suspicious file online to see if it’s a malicious file. Windows 7 does not have any native way to show or calculate a file’s hashes. But you can use the freeware HashTab tool to add a File Hashes tab in the file properties dialog.

After installing  HashTab in Windows, all you have to do is right-click on any file and choose Properties from the context-menu. In the File Properties dialog, you would see an extra tab File Hashes which shows the that file’s hash values using multiple hashing algorithms. By default, it shows the hashes using CRC32, MD5 and SHA-1 functions.

file hashes tab 0 Add File Hashes Tab in File Properties in Windows 7 [How To]

If you want to customize which hash functions should be used to calculate the file hashes, then you can click on the little Settings link shown in the tab. In the HashTab Settings window, you can choose  from over 14 different  hash functions like MD2, MD3,  MD5, SHA256, SHA512, Adler32, RIPEMD-256 and more. You can also choose to show the hashes in uppercase letters or lowercase letters.

file hashes tab 1 Add File Hashes Tab in File Properties in Windows 7 [How To]

Are wondering how you can use a file’s hash value to find out if it’s a malicious file? Its easy. First of all open the file properties dialog for a file you want to check. Select the File Hashes tab, right-click on the SHA-1 hash and choose to Copy it. Now visit the VirusTotal site in your browser, paste the hash value you copied in the search field and click on the Search It button. The VirusTotal site would immediately show you a list of scan results indicating if that file is malicious or not.

file hashes tab 2 Add File Hashes Tab in File Properties in Windows 7 [How To]

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download64 Add File Hashes Tab in File Properties in Windows 7 [How To]

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 Add File Hashes Tab in File Properties in Windows 7 [How To]

About Sudesh

Sudesh has always been curious about computers and technology. Loves to play with both Windows and Linux. Likes to help people solve their computer problems. Has written technical articles and tutorials for some websites including MintyWhite.

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Comments

  • http://electroninx.bravehost.com/ sunshinekhan

    I think it would be better if there could be a detail in the explorer window itself, like size or date modified. A tip to do that would be a thumbs up!

  • Saddam

    Thanks for sharing this useful post.I use windows 7.Now i get a new idea.


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