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ransomware file with extension b431. Help


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#1 limasalv

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Posted 23 December 2016 - 11:14 AM

My client has been infected by a ransomware and has encrypted all my word files with an extension never heard.

The extension is b431

 

Which removal (decrypt) tool do you suggest me?

 

Thank you very much 

Sal


Edited by limasalv, 23 December 2016 - 11:15 AM.


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#2 Demonslay335

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Posted 23 December 2016 - 01:11 PM

Cerber renames files with a random 4 character hexidecimal extension, with a particular pattern. Upload a ransom note and sample file to ID Ransomware for confirmation.

 

If it identifies Cerber, there is no way to decrypt the files - it will link you to more information.


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.


#3 quietman7

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Posted 23 December 2016 - 04:29 PM

Expanding on what Demonslay335 said...any files that are encrypted with Cerber v4x/v5x will be renamed (encrypted) with 10 random characters followed by a random 4 character extension appended to the end of the encrypted data filename (i.e. 1xQHJgozZM.b71c) and leave files (ransom notes) named README.hta, README.html as explained here. Any files that are encrypted with Cerber v5x will also include a few new changes as explained here.

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.When or if a solution is found, that information will be provided in this support topic and you will receive notification if subscribed to it. In addition, a news article most likely will be posted on the BleepingComputer front page.

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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