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I need something on the level of packet filtering. so even someone is trying to open a file it will block.
The virus/malware rensome got through the trend micro which is installed on every workstation and server.
When I ran malwarebyts it found lots of spyware. so the trend micro isn't very efficient.
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Ramin
Malwarebyts is very good but the most important thing is Backing UP the data on a regular basis.
John
Packet filtering is pretty much ineffective against normal email which is what ransomware uses. Spam filtering is much more effective
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McKnife
Alonig1, with such a small crowd of computers, you should definitely look at application whitelisting: https://technet.microsoft.com/en-us/library/hh831534(v=ws.11).aspx it stops viruses from being executed even when your virus scanner doesn't recognize it. If you have questions about the functionality, feel free to ask.
The best defense for this is a really good Spam Filter.
Once opened you need top brand Anti Virus, but sometimes people clicking on strange email may still cause problems.
Train your users.