4 Ways GreyNoise Improves SOC Outcomes

Every organization connected to the internet faces the same background noise: automated exploitation attempts, vulnerability scanning, and credential abuse hitting the perimeter around the clock. The hard part isn't seeing the traffic, it's answering three questions fast enough to matter. What's hitting us? What's getting through? And what's already talking to adversary infrastructure?

GreyNoise continuously observes scan and attack activity across the internet, classifies the source IPs by behavior, and delivers that intelligence into your SIEM. The point isn't more data. It's separating the opportunistic noise, the stuff hitting everyone, from activity that might actually be aimed at you. Here are four ways SOC teams are putting that distinction to work.

1. Reduce alert volume and surface potentially targeted threats

Detections on perimeter scans and attacks are noisy by nature. Most alerts off edge devices aren't real threats, so they get ignored or suppressed. The alerts worth investigating are in there but they're just buried under scanning noise that hides anything resembling a targeted threat.
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Filter your firewall and WAF logs down to inbound internet traffic, then match source IPs against GreyNoise and exclude the known mass scanners. Prioritize what's left by source-IP volume. Stripping out opportunistic scanning means analysts triage far fewer events, and the detection logic that remains has room to surface traffic more likely to represent targeted reconnaissance or attack activity.
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Fewer alerts, better signal-to-noise. Every remaining alert comes from an IP GreyNoise has never observed scanning the internet, which is a much stronger indicator of potential targeted reconnaissance.

2. Detect allowed inbound traffic from known-malicious hosts