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Supposed CryptoWall infection, but no trace of the virus?


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#1 hrabbot

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Posted 01 October 2014 - 08:19 AM

I'm attempting to clean a work computer of a CryptoWall infection for another user.  Only the contents of a personal SD card was encrypted, with all files on the machine itself being safe and sound.  This does not add up to me.  I can't find any trace of the virus itself with a Malwarebytes scan with updated database, and I don't see any file list registry entries consistent with this malware.

 

My assumption was that the infection occurred at home, encrypting his SD card contents, and then transported to work, where everything is actually fine.  I mentioned this to him, but he insists the SD card has been in the machine for a very long time.  The encrypted files all have a modified date of 9/22/14.

 

Are there other steps I should take to root out this virus before declaring the machine clean?



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#2 quietman7

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Posted 01 October 2014 - 12:56 PM


A repository of all current knowledge regarding CryptoWall is provided by Grinler (aka Lawrence Abrams), in this tutorial: CryptoWall and DECRYPT_INSTRUCTION Ransomware Information Guide and FAQ

There is also a lengthy ongoing discussion in this topic: CryptoWall - new variant of CryptoDefense. Rather than have everyone start individual topics, it would be best (and more manageable for staff) if you posted any questions, comments or requests for assistance in that topic discussion.

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#3 hrabbot

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Posted 01 October 2014 - 01:05 PM

Thank you for your response.  I posted in the thread you referenced.



#4 quietman7

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Posted 01 October 2014 - 01:10 PM

You're welcome and good luck.
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