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What is the key

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#1 Mark_Joe


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Posted 03 December 2017 - 06:27 PM

Hello guys,
I have interests about analyzing ransomwares and get the key,

but yesterday I couldn't get the key from this ransomware, who has an idea?

I use dnspy with analysis

for download


With kind regards

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#2 Demonslay335


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Posted 04 December 2017 - 01:39 AM

Were your files encrypted by this? Looks like it uses the extension ".mrcyber".


It uses a random string generator for the password, it isn't just static or anything. It may be decryptable, but will have to be bruteforced using an encrypted file and it's original. Also, it technically generates a new password per file, so there's a bit more work to be done even if you get the password for one file.


Also, the encryption routine itself really reminds me of JobCrypter.


*Edit: Upon further inspection, it may actually be nearly impossible to decrypt too many files. Not only is the password generator called for every file (which is never saved anywhere), it also just appends a global variable each time... so with each new file to encrypt, the password just gets longer as passwords are appended to each other into infinity...

Edited by Demonslay335, 04 December 2017 - 01:52 AM.

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 Mark_Joe

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Posted 04 December 2017 - 02:24 AM

Acctully no my friend gave me the ransomware from 1 year, and yesterday I found it again and tried to analyse it

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