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RSA4096 cryptosystem


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#1 decrypt belgium

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Posted 06 April 2016 - 08:51 AM

Hi, we have a customer who was infected with encryption - RSA4096

 

I have a correct and a corrupt version of a file I can send (I've send tho Nathan - don't know if he is still active?)

 

Does someone has any experience with this?

 

 

 



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#2 Demonslay335

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Posted 06 April 2016 - 09:22 AM

TeslaCrypt likes to lie about using RSA-4096, so that is most likely what you are dealing with. TeslaCrypt 3.0 and 4.0 do not have a solution at this time, as even though they lie about using RSA-4096, they use an equally strong encryption and key protection system (layers of AES256 + SHA256 + ECDH). Having an original file does not help since it has been confirmed to use AES encryption, which is impervious to a plain-text attack.

 

You can read more in the following help topic.

 

For confirmation, you may upload a ransom note and encrypted file to the website in my signature. It will also guide you to the appropriate support topic.


logo-25.pngID Ransomware - Identify What Ransomware Encrypted Your Files [Support Topic]

ransomnotecleaner-25.png RansomNoteCleaner - Remove Ransom Notes Left Behind [Support Topic]

cryptosearch-25.pngCryptoSearch - Find Files Encrypted by Ransomware [Support Topic]

If I have helped you and you wish to support my ransomware fighting, you may support me here.


#3 decrypt belgium

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Posted 06 April 2016 - 09:32 AM

Hi Demon,

 

thanks for your answer - I did check the ransom note and encryted file with your ID Ransomware webiste - which confirmed me that there is currently no solution.

I also uploaded them on BC for further analyse. Still crossing the fingers on a solution...



#4 quietman7

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Posted 06 April 2016 - 04:46 PM

Since the infection is TeslaCrypt 3.0 or 4.0...rather than have everyone start individual topics, it would be best (and more manageable for staff) if you posted any more questions, comments or requests for assistance in the above support topic discussion. Doing that will also ensure you receive proper assistance from our crypto malware experts since they may not see this thread. To avoid unnecessary confusion...this topic is closed.

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