Do I need to upgrade my Security Deluxe package?

Hi,

Ours is a small office of 4 systems. We are using the Norton Security Deluxe package. I have a concern to clear.

Recently, I came across a random video blog about the botnet attacks and malware. http://www.storagepipe.com/blog/DDoS-Bitcoin-Brute-Force-Malware/ We hosted our servers on Linux servers hoping that would be safe. But the video says otherwise. And, we use the bitcoin payment system for the international trade. 

This prompted us to check our cyber security. I would like to know whether the current plan would suffice for protection against malware and botnet attacks. Need your suggestion.

Thanks.