Proactive threat-hunting is the process of actively searching for unknown threats in the network, rather than waiting for alerts or indicators of compromise. Some of the important reasons for performing proactive threat-hunting activities are:
To uncover unknown threats that may have evaded detection by existing security tools or controls, and to mitigate them before they cause damage or data loss.
To create a new security baseline that reflects the current state of the network, and to identify any anomalies or deviations from the normal behavior or activity.