Don’t Let Your Team Drown in Netflow | Cybersecurity Blog | Grey Noise
Summary: GreyNoise describes the operational difficulty of using netflow data, whether collected from your own devices, pulled from cloud provider flow logs, or purchased from netflow providers, citing the sheer volume of data and the limited detail in flow logs alone. The post recommends establishing a network baseline, correlating flows with firewall alerts and threat intelligence, and using GreyNoise's sensor network data as a first-pass filter to remove opportunistic and mass scan activity.
What you should know: The volume of flow data is large enough that malicious activity can be missed even after baselines and correlated alerts are in place, and organizations buying commercial netflow data and pairing it with Censys or Shodan to find C2 beacons still face a large amount of data to sift through.
Read the original at GreyNoise Blog ↗
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