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Identify machine infected with Cryptowall


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#1 ableinc

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Posted 03 October 2014 - 09:55 AM

     I have a small network with about 15 workstations connecting to a server.  They have mapped drives to shared directories on the server.  Something infected with Cryptowall is encrypting files in the shared directories.  We are having trouble identifying which machine is infected and doing the encrypting.  I am looking for ideas on how to identify the infected machine.  I have tried using Process Monitor from sysinternals and looking through the logs to see who is touching the affected files but I did not have much luck.  I looked at Openfilesview from NirSoft but it does not show the user who has the file open.  The manage open files console in Windows does show the user but does not give a real time view or save a log.  Is there something specific in the network traffic I could look for in Wireshark?  Open to any ideas.

 

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#2 quietman7

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Posted 03 October 2014 - 11:33 AM

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

Reading that Guide will help you understand what CryptoDefense does and provide information for how to deal with it and possibly decrypt/recover your files. At this time there is no fix tool for CryptoWall.

There is an ongoing discussions in this topic where you can ask questions and seek further assistance.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. Doing that will also ensure you receive proper assistance from our crypto malware experts since they may not see this thread. To avoid unnecessary confusion...this topic is closed.

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