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Djvu ransomware decryption of photos


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i can repair my encrypted image by sending them both my camera sample file and changed extension to .jpg ransomware encrypted file they give me a perfect decrypted pic. but the price are very high is there any way that i can find encryption key by comparing both encrypted and decrypted image file than i can decrypt my all photos is there any way for that? Help me out here plz

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17 hours ago, Vaibhav2912 said:

is there any way that i can find encryption key by comparing both encrypted and decrypted image file than i can decrypt my all photos is there any way for that?

That only works for older variants. If I remember right, near the end of August 2019 they switched to using RSA encryption, which isn't vulnerable to that sort of attack.

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17 minutes ago, GT500 said:

That only works for older variants. If I remember right, near the end of August 2019 they switched to using RSA encryption, which isn't vulnerable to that sort of attack.

18 hours ago, Vaibhav2912 said:

https://www.jpeg-repair.org/

In this site i can repair my encrypted image by sending them both my camera sample file and changed extension to .jpg ransomware encrypted file they give me a perfect decrypted pic but the prise are very high is there any way that i can find encryption key by comparing both encrypted and decrypted image file than i can decrypt my all photos is there any way for that? Help me out here plz

 

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25 minutes ago, GT500 said:

That only works for older variants. If I remember right, near the end of August 2019 they switched to using RSA encryption, which isn't vulnerable to that sort of attack.

How that site can repair that encrypted files can Repair jpg.

    Edited by GT500
    Fixed post.
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    4 minutes ago, Vaibhav2912 said:

    How that site can repair that encrypted files can't we use that method?

    Because the entire file isn't encrypted. Only a small portion of the beginning of the file is encrypted, thus making it impossible for anything to open the file. JPEG/JPG files can technically be repaired, however it requires someone to manually repair each file by hand. There's no known automated method of repairing JPG files that will work for STOP/Djvu encrypted files.

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    Ok i can repair my jpg on

    1 minute ago, GT500 said:

    Because the entire file isn't encrypted. Only a small portion of the beginning of the file is encrypted, thus making it impossible for anything to open the file. JPEG/JPG files can technically be repaired, however it requires someone to manually repair each file by hand. There's no known automated method of repairing JPG files that will work for STOP/Djvu encrypted files.

    I can repair some of my .heroset files on that site and also i cant recover on emsisoft decryption tool it's shows error of new variant like that but still there is the site where i can repair this jpg.

    Yas i can understand what you say about rsa encryption but how can they repair that's the pont also my files are encrypted in july before rsa encryption started

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    Just now, Vaibhav2912 said:

    how can they repair

    I already explained that.

    Certain files can be repaired. Many video and audio file formats for instance are repairable with special software. JPG files are technically repairable as well, however as I said it can't be automated, and must be done manually one JPG file at a time. Anyone who would do that for you would charge you a lot of money to do it, and considering the specialized knowledge it would require I doubt very many people could do it.

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