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Xorist variant which Emisoft's Decryptor can't decrypt


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#1 nirualc

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Posted 03 July 2017 - 04:02 AM

Hi, first of all thank you for all the information here and all the effort clearly behind it!

 

Now to the problem: My server was hit with a malware encrypting a lot of files. ID Ransomware identified is as Xorist and I tried the tool made by Emisoft with a couple of files (orig and encrypted) but even though the tool said it found a key, decryption was not successful.

 

The ransomnote 'HOW TO DECRYPT FILES.txt' says:

---

YOUR SYSTEM IS LOCKED AND ALL YOUR DATA HAS BEEN ENCRYPTED.

DON'T WORRY YOUR FILES AS SAFE.

TO RETURN ALL THE NORMALLY YOU MUST BUY THE DECRYPTOR PROGRAM.

PAYMENTS ARE ACCEPTED ONLY THROUGH THE BITCOIN NETWORK.

YOU CAN GET THEM VIA ATM MACHINE OR ONLINE





THE PRICE FOR DECRYPTOR SOFTWARE IS 1 BTC

BTC ADRESS : 13erqqbBFUaVLyLPwm3dUhApG4xAVQd5Ei

VERRY IMPORTANT !

DO NOT TRY TO SCAN WITH ANTIVIRUS YOU RISK LOSING YOUR DATA .

For more information : secure2017@tuta.io    (24/7)

Subject : SYSTEM-ID:20172018

---

 

The extensions of the encrypted files vary a bit, examples:

 

.BLACK_MAMBA_Files@QQ.COM

.blocked@blocked.cc.BLACK_MAMBA_Files@QQ.COM

.blocked@blocked.cc.blocked@blocked.cc.BLACK_MAMBA_Files@QQ.COM

 

I have samples of an unencrypted file and its encrypted version which I can upload (the form says to wait for a sample to be requested).

 

Thanks a lot in advance!
nirualc



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#2 quietman7

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Posted 03 July 2017 - 05:57 AM

.BLACK_MAMBA is the latest version of Xorist and has already been reported.

There is an ongoing discussion in this topic where victims can post comments, ask questions and seek further assistance. Other victims have been directed there to share information, experiences and suggestions.Rather than have everyone with 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...it includes experiences by experts, a variety of IT consultants, end users and company reps who have been affected by ransomware infections. To avoid unnecessary confusion, this topic is closed.

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