Spotting unusual activities in your system is crucial for preventing a cyber attack or at least stopping it from causing too much damage. However, it takes an experienced eye to spot a change in the system that might be caused by an external or even internal threat.
How to Investigate Unusual Activities on Your Network – NIST Cybersecurity
The First Steps to Adopting NIST Guidelines

The NIST framework is one of the most recommended sets of guidelines that aim to help users to protect their business infrastructures from cybersecurity threats. The framework consists of a variety of guidelines that will not only help you deal with the consequences of a cyberattack but also prevent security incidents in the first place.