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Unknown Ransomware encryption without modification of file types


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#1 ruskata

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Posted 05 July 2016 - 01:01 PM

Hey guys and girls!

I have found this incredibly useful forum in my nervous travels around the virtual space last hours and have great hopes in you..


An important PC was attacked and successfully encrypted by a unknown cryptovirus. It doesn't change the files, just encrypts them. It uses some onion website via tor to remain anonymous. The Identify Ransomware tool provided by a member on this awesome website detects it as once some Russian something like EDS2 then JobCrypter, but when i check them, they look completely irrelevant...

 

I have gathered 3 types of files that should help you hep me... I will be forever grateful for every second you spent reading/trying to help, so I will try to be very short and up to the point.
 

Here are the 3 types of files I managed to gather and find important:

  1. Two files - before and after encryption. They are called "encrypted.txt" and "original.txt". I chose this file since it is very short and should be easier to identify? I have large files... I'll just create a new folder with larger files! Like 3-4MB just in case it is easier with more encrypted / original info;
  2. The 3 types of "README" files that are spread everywhere around the system;
  3. KEY files and one more that have been created just before the srpeading of README files start. I guesss those are important!

Here are the files:

https://www.dropbox.com/sh/fssddl8zrlikhpd/AADA7KsBEEUN2HGsnC94orlea?dl=0

 

I have erased the personal ID i got, just in case they can track us and wipe the system.

 

Can you help me identify what kind of ransomware it is?

 

If you can help me with decryption, that would be a dream... Any help is most welcome! I am stuck...

 

THANK YOU FOR SPENDING YOUR TIME TO HELP ME! I AM FOREVER GRATEFUL NO MATTER THE RESULT!



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#2 Amigo-A

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Posted 05 July 2016 - 01:49 PM

ruskata

ID Ransomware

By simply uploading a ransom note, and/or an encrypted file (preferably both for best results), the site will use several techniques to help identify what ransomware may have encrypted the files. This includes assessing the ransom note name, file name patterns of the encrypted file, and in some cases, even byte patterns in the encrypted file itself.


My projects: Digest "Crypto-Ransomwares" + Anti-Ransomware Project (In Russian) + Google Translate Technology

Have you been attacked by a Ransomware? Report here. Знаете русский язык? Пишите мне на русском. Помогу. 


#3 ruskata

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Posted 05 July 2016 - 01:56 PM

Hi Amigo-A,

I wrote about that, but I understand you for not reading completely or me not explaining properly.

That website was used by me and it gave me twice different results and both of them are irrelevant - they are completely different from what it is. Once it was JobCrypter and another time Russian EDA2, both of them are not the right one in my opinion - I used decryptors and it didn't work or the files were not in the same format (actually mine look exactly the same as original files, just encrypted without changing name or file type).

 

Thank you for your help!!!


Edited by ruskata, 05 July 2016 - 02:00 PM.


#4 Demonslay335

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Posted 05 July 2016 - 02:13 PM

From the wording and the look of the Tor site, it seems like one of the newer variants of CryptXXX to me, which is not decryptable I'm afraid. That is a bit odd that there was no extension added and the ransom note is simply called "README.txt"; usually they will add an extension at least, the newer one adds a random 5-character extension per victim.

 

JobCrypter and the Russian EDA2 would be identified by the generic "README.txt", but they both have extensions that would have been added. In this case, I believe they are a false-positive.


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.


#5 ruskata

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Posted 05 July 2016 - 02:50 PM

They ask for 2.4 BTC, which is kinda OK. Do you think paying them will help at all?



#6 Demonslay335

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Posted 05 July 2016 - 02:52 PM

You are never guaranteed to receive your files back after paying - these are criminals afterall. CryptXXX has also been plagued by broken decrypters that do not work, there are plenty of testiments from victims on this in the CryptXXX 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.


#7 quietman7

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Posted 05 July 2016 - 04:33 PM

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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