Splunk SIEM Overview

Overview

Every internet-facing device is constantly bombarded by scanners, bots, and automated tools — generating thousands of false-positive alerts that overwhelm SOC teams and bury real threats.

The GreyNoise App for Splunk seamlessly integrates GreyNoise's massive dataset of internet intelligence directly into your Splunk environment. By correlating your internal network traffic with GreyNoise's real-time data, you can instantly distinguish between targeted attacks and opportunistic internet background noise. This allows analysts to ignore harmless scanners and focus investigations on true, targeted threats.

Key Capabilities

  • SPL-Native Threat Hunting: Query GreyNoise directly from Splunk SPL using four native commands — no context switching required.
  • Pre-Built Visual Dashboards: Three ready-to-use dashboards covering environment overview, IP query history, and live threat investigation.
  • Advanced Risk Scoring & CIM Integration: Fully CIM-mapped with native Splunk ES support for Adaptive Response Actions and automated Risk Score adjustments.
  • Local Threat Feeds: Daily GreyNoise indicator ingestion into local lookup tables for zero-latency correlations without API calls.
  • Automated Background Scanning & Caching: Continuously cross-reference active IPs against GreyNoise data with configurable caching to preserve API quota.

Benefits for the SOC Team

Without GreyNoiseWith GreyNoise
Analysts review every single inbound alertKnown safe services and scanners are auto-suppressed
No context on who is hitting the perimeterEvery IP is enriched with classification, tags, actor, and CVE data
Manual IP research takes 30-45 minutes per shiftZero manual research — verdicts delivered automatically

Overview Video