Threat Hunting

Needle in the haystack. Found

Quickly identify anomalous behavior and catch targeted threats

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Overview

Effective threat hunting isn't just about finding more data, it’s about finding the right data. GreyNoise empowers your hunt team to adopt the PEAK Framework by correlating your internal traffic against our real-time map of internet-wide mass scanning.

By using GreyNoise to filter out opportunistic probes, benign scanners, and botnet noise, you reveal the statistically significant anomalies that represent targeted attacks. Stop chasing false positives and focus on the signals that actually threaten your perimeter.

How GreyNoise
Helps You Hunt Smarter

Focus effort on highest risks

Eliminate time-consuming research of benign and opportunistic scanning, allowing hunters to focus on infrastructure actually used by threat actors.

Supports threat research and hypothesis development

Hunters can use GreyNoise to conduct threat research, validate assumptions, and explore attack vectors in order to develop hypotheses.

Correlate isolated incidents

GreyNoise helps threat hunters link isolated incidents to larger campaigns by mapping attacker infrastructure and patterns, connecting logged IPs to those exploiting relevant vulnerabilities.

How GreyNoise Maps to the PEAK Hunting Framework

Explore Available Fields

Filter by category & search available IP fields and their uses with GreyNoise.
Categories
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NAME
Description & Use
Exploitation Activity Threat IP Count (10d)
Total number of threat IPs GreyNoise observed scanning or exploiting this vulnerability in the last 10 days.
Exploitation Activity Threat IP Count (1d)
Total number of threat IPs GreyNoise observed scanning or exploiting this vulnerability today.
Exploitation Activity Threat IP Count (30d)
Total number of threat IPs GreyNoise observed scanning or exploiting this vulnerability in the last 30 days. Useful for long-term prioritization and trend analysis.
Exploitation Details
Exploitation-related details pertaining to attack vector category, EPSS score (Exploit Prediction Scoring System), available exploits, and KEV (Known Exploited Vulnerabilities) registration. Guides whether to prioritize based on real-world attacker use.
Exploitation Details Attack Vector
The method attackers use to exploit the vulnerability (e.g., network, local, adjacent). Helps assess exposure across internet-facing vs. internal assets.
Exploitation Details EPSS Score
EPSS score (Exploit Prediction Scoring System) associated with the exploitation.
Exploitation Details Exploit Found
Indicates whether a working exploit is publicly available. Confirms attacker capability and should increase remediation priority.
Exploitation Details Registered in KEV
Whether exploitation has been registered in the KEV (Known Exploited Vulnerabilities) database.
Exploitation Stats
Statistical data about exploitation, including number of exploits available, and number of threat actors and botnets exploiting the vulnerability.
Exploitation Stats Number of Available Exploits
Total number of exploits available (public + commercial).
Exploitation Stats Number of Botnets Exploiting Vulnerability
Total number of botnets exploiting the vulnerability.
Exploitation Stats Number of Threat Actors Exploiting Vulnerability
Total number of known threat actors exploiting the vulnerability.
First Seen
Date the IP was first observed by GreyNoise. Indicates activity lifetime.
HTTP Cookie Keys
HTTP cookie keys observed in scanning activity. Useful for identifying web scanners/exploit kits.
HTTP Host
HTTP Host headers observed. Provides web attack targeting clues.
HTTP MD5
MD5 hash of observed HTTP payloads. Useful for malware identification.
Last Seen Timestamp
Exact date and time the IP was last observed. Enables timeline reconstruction in investigations.
Mobile
Indicates if the IP belongs to a mobile/cellular network.
Name
Display name of the tag. Analyst-facing label for quick recognition.
Organization
Organization responsible for the IP. Adds enrichment for attribution.
Organization Count
Count of IPs linked to each organization. Useful for assessing exposure by provider.
Port
Port observed in scanning activity. Useful for identifying targeted services.
Protocol
Protocol (e.g., TCP/UDP) used in scanning activity. Adds layer-4 context.
RDNS
Reverse DNS value for the IP. May reveal hostnames tied to services or campaigns.
RDNS Parent
Parent domain of the reverse DNS. Useful for clustering infrastructure.
Recommended Block
Indicates whether IPs with this tag should be blocked. Supports automated policy decisions.
References
References (e.g., CVE pages, docs) supporting the tag. Provides analyst enrichment sources.
Region
State/province where the IP is registered. Adds sub-country geolocation context.
SSH Key
SSH keys observed from traffic. Can reveal attacker tooling or campaigns.
Sensor Count
Number of distinct sensors that saw the IP. Higher values indicates wider scanning footprint.
Sensor Hits
Total number of events GreyNoise sensors recorded from this IP. Indicates activity volume.
Single Destination
True if the IP only scanned one country. Suggests targeted reconnaissance.

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