A breach can remain undetected within networks for weeks, months or even years. This time gives hackers the luxury of lateral movement within a network, meaning they can acquire better credentials, compromise more systems and search for the most profitable and most damaging information. Traffic monitoring tools could very well be the next big thing in network security, protecting networks against cyber-attacks and helping even if a breach has already happened. They can identify malware that has to communicate back to hackers somehow, and new monitoring tools have emerged that can identify that traffic.”]
Source: https://www.csoonline.com/article/2887266/new-weapons-offer-hope-against-advanced-cyber-attacks.html