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CryptoWall presence?


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I just found and deleted two "HELP_DECRYPT.PNG"  files on my business file server. Both were on shared drive root.

I have no anti-virus on my file server. What I did is I search for crypto*.* on this file server, and found nothing.

I also install Malwarebytes and did a "Threat Scan", nothing were found.


Our ~250 business desktop computers all have ESET Endpoint Antivirus installed.


No files seems to be encrypted so far. How is it possible? What should I do?



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Unfortunately, if ESET was not installed on the server and no logs are available for analysis, it's impossible to tell what happened if you are positive that nobody was browsing the web or reading email on the server. You can send me the output from running ESET Log Collector (hxxp://kb.eset.com/esetkb/index?page=content&id=SOLN3466) to make sure that ESET is configured for maximum protection.

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