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Dharma (.cezar) ransomware infection

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#1 Papagut


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Posted 21 January 2018 - 07:19 PM

Hi there, 


It seems I have a ransomware infection. More or less all my files have been renamed like this: 




The ID is what I am asked to put into my email subject line in the ransom note, I am assuming that it is unique to me. When I look at the file type, it is .java


I have tried a few things: restore points and shadow volumes appear to be deleted, and I tried a couple of decrypters, but both were unsuccessful. I have multiple windows 10 machines and one old server, which is where I think the infection originated. I have a backup, but something appears wrong with that too. 


Since my e-mail operates through my old server, e-mail will not reach me for now. I will check back at this topic regularly until it is restored. 


So, this is my unfortunate starting point, any help you can provide will be very much appreciated, 



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#2 quietman7


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Posted 22 January 2018 - 07:41 AM

Any files that are encrypted with Dharma (CrySiS) Ransomware will have an id-<8 random hexadecimal characters>.[<email>] followed by the .dharma, .wallet, .zzzzz, .onion, .cezar (.cesar), .arena, .cobra or .java extension appended to the end of the encrypted data filename.
.id-01234567.[gladius_rectus@aol.com].cezar (.cesar)
Dharma (CrySiS) will leave files (ransom notes) with names like README.txt, README.jpg, Hello my vichtim.txt, Your personal data are encrypted!.txt, FILES ENCRYPTED.txt, Files encrypted!!.txt, info.hta.

Unfortunately, there is no known method to decrypt files encrypted by the .zzzzz, .cezar (.cesar), .arena, .cobra and .java variants of Dharma (CrySiS) without paying the ransom. If possible, your best option is to restore from backups, try file recovery software or backup/save your encrypted data as is and wait for a possible solution at a later time.

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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