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.zzzzz randsomeware found on PC and NAS (synology 213+)


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#1 leonardus56

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Posted 02 December 2016 - 01:18 PM

HI there,

 

Today I received a note from a colleague of mine who accidentally clicked on a file which had been sent to him as an attachment to an email.

On his pc he has two fixed network connections to a NAS with loads of photos. You can already guess it: randsomeware problems. Also automatically on the NAS. More than 49,000 photos and many powerpoints and documents have become inaccessible. Many files have got  the extension zzzzz and others have been changed into htm pages. What did we do? We re-imaged the pc, we immediately deleted the NAS from the network and switched it off. But unfortunately the damage had already been done. Does anyone have an idea as to how we could repair these files again? Is there already a tool for this?

A search on google hasn't had any results so far.

 

Thanks for thinking along with us. Greetings from Holland.

 

Leo



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#2 woody188

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Posted 02 December 2016 - 01:24 PM

This is the latest Locky ransomware variant. I'm not aware of any decryptor so a backup is necessary to restore the files. We had this one today too and I was able to capture the DLL's used to encrypt the files:

 

File:     ultpkV.343
Size:     196608
MD5:      0BCC2B239182C73FCE76C930454596AC
Compiled: Wed, Nov 30 2016, 15:50:44 - 32 Bit DLL
Scan Date:   2016-12-02 10:48:13
Detections:  41/56
 
File:     ultpkV.34
Size:     196608
MD5:      60D5BA522A5623BC56CDEAE10AFD0DB3
FileType: 34 File
Scan Date:   2016-12-02 14:05:14
Detections:  2/55
 
These will be in your %TEMP% folder. Our ingress was also email: TEMP1_SKMBT_C43663447879245.ZIP\UPU7P1X-1943.VBS
The zip file name mimics the default file naming for popular scan to email applications from copier vendors.


#3 quietman7

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Posted 02 December 2016 - 01:25 PM

Any files that are encrypted with Dharma Ransomware (a new variant of CrySiS) will have an .[<email>].dharma, .[<email>].wallet or .<email>.zzzzz extension appended to the end of the encrypted data filename and leave files (ransom notes) named README.txt, README.jpg as explained here.

The .zzzzz variant is a spoof of Locky Ransomware but the original filename is not renamed like the real Locky...see here.

Unfortunately, there is no known way at this time to decrypt files encrypted by Dharma variants without paying the ransom. Our crypto malware experts who analyze these infections suspect another cyber criminal forked the code and generated their own keys which were not part of the leaked master decryption keys for the original CrySiS variants.

There is an ongoing discussion in this topic where you 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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