Ransomware: id-3509099450_[mk.goro@aol.com].0oxr4

UPDATE 6/8/2017: This is a CRyPTON Variant, see below.

A new variant of Dharma CryptON (CryptON 36 variant, to be precise), seems to have hit a server;  here are some of the details I’ve been gathering.

Ransom Note

A file named ### DECRYPT MY FILES ###.txt is placed in each directory where encrypted files are located with the following content.


To decrypt your files you need to buy the special software – «Nemesis decryptor»
You can find out the details / buy decryptor + key / ask questions by email: mk.goro@aol.com
Your personal ID: 3509099450

Encrypted Files

Encrypted files have the following appended: .id-3509099450_[mk.goro@aol.com].0oxr4

Registry Entry

An interesting Registry entry is observed:

Windows Registry Editor Version 5.00


Google search for any parts of .0oxr4 comes up short as well as any of the information in the Registry key HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\KJ8CvJIB1H5nRcJZ


Searching for the email mk.goro@aol.com indicates this may be a ransomware that can be decrypted, according to ID Ransomware website.  However, I have found nothing that works for decrypting.

I have attached two sample files, an original Informant SNMP zip file pulled from a backup as well as the encrypted file.

Still a work in progress…

Update: 6/8/2017

From: https://www.bleepingcomputer.com/forums/t/632389/dharma-ransomware-filenameemaildharmawalletzzzzz-support-topic/page-99

Any files that are encrypted with the newest variant of CryptON (Cry9, Cry36, Cry128, X3M, Nemesis) will have a random 5 character hexadecimal extension appended to the end of the encrypted data filename (i.e. .id-1163283255_[liukang@mortalkombat.su].08c85, .id-1163283255_[mk.baraka@aol.com].830s7) and leave files (ransom notes) named ### DECRYPT MY FILES ###.txt.

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.

This is a cry36 variant and apparently not decrypted at this time, see: https://support.emsisoft.com/topic/27231-cry9-invalid-crypton-file-pair/?page=4#comment-171791

8 thoughts on “Ransomware: id-3509099450_[mk.goro@aol.com].0oxr4

    1. Rich Kreider Post author

      Hi Petr,

      Not yet as far as decryption. I’ve been monitoring a couple forums to see if/when there is a decryption tool. The server was restored from backup, but I did keep an infected state image for further analysis if needed.


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