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black block ransomware


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#1 khk10

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Posted 28 August 2017 - 12:01 AM

my customer got hit with this ransomware.  he ended up paying the ransom.  they sent him the tool and key but after "decryption" all the files seem to be corrupt.

 

from anyones experience is there a way to repair the headers on these files?

 

unfortunately their backups were hit too.



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#2 Daniel_Boringcliffe

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Posted 28 August 2017 - 03:13 AM

Does he have shadow volume copies ? He can also try recuva, maybe it'll help. 

 

So why did he pay ? Chances are always very unlikely that he'll get the files back once encrypted.



#3 quietman7

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Posted 28 August 2017 - 08:53 AM

Is .blackblock the file extension appended to your encrypted data files? If so I believe it is a Globe Ransomware variant....see here.
Did you find any ransom notes and if so, what is the actual name of the note?
Did the cyber-criminals provide an email address to send payment to? If so, what is the email address?

Did you submit any samples of encrypted files and ransom notes to ID Ransomware for assistance with identification and confirmation? Uploading both encrypted files and ransom notes together provides a more positive match and helps to avoid false detections.


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#4 khk10

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Posted 28 August 2017 - 12:22 PM

The extension was .aleta and the email was black.block@qq.com

#5 quietman7

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Posted 28 August 2017 - 02:45 PM

Any files that are encrypted with BTCWare Ransomware will have the [<email>].btcware, [<email>].cryptobyte, [<email>].cryptowin, [<email>].theva, [<email>].onyon, [<email>].xfile, [<email>].master, [<email>].blocking, [<email>].encrypted, [<email>].aleta or [<email>].gryphon extension appended to the end of the encrypted data filename and leave files (ransom notes) named #_HOW_TO_FIX_!.hta, READ ME.txt, #_README_#, !#_RESTORE_FILES_#!.inf, !#_READ_ME_#!.hta, !#_DECRYPT_#!.inf, !## DECRYPT FILES ##!.txt.

.aleta is based on the latest AES-256 version of the BTCWare Ransomware family which uses a different RSA-1024 key and is not decryptable unless you have the private AES key from the criminals...there is no way to bruteforce the key for any version after .onyon. Read Demonslay335's comments in Post #398 and Post #409. If possible, your best option is to restore from backups.

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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