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
ASN
Autonomous System Number routing the IP. Helps group malicious infrastructure.
ASN Count
Count of IPs grouped by ASN. Supports ASN-level threat analysis.
Actor
Known or attributed owner/operator of the IP (e.g., research org, ISP, hosting provider). Useful for attribution.
Actor Count
Aggregated count of IPs per actor. Supports statistical analysis of actors.
Bot
Flags whether the IP is part of known botnet activity. Helps detect automated scanning or malware distribution.
CVE
List of CVEs the IP has scanned for or attempted to exploit. Critical for vulnerability triage.
CVEs
CVEs tied to the tag behavior. Critical for identifying exploitation of known vulnerabilities.
Category
High-level network type (e.g., hosting, ISP, enterprise).
Category Count
Aggregated count of IPs per category (hosting, ISP, etc.). Highlights infrastructure trends.
City
Registered city of the IP. Useful for geolocation context and pivoting.
Classification
GreyNoise’s judgment of the IP’s intent: benign, malicious, suspicious, or unknown. Most useful filter for triage.
Classification Count
Aggregated count of IPs per classification. Useful for threat landscape analysis.
Created At
Date the tag was first added. Indicates when this behavior was first observed.
Description
Human-readable explanation of what the tag represents. Adds analyst context.
Destination ASNs
List of ASNs targeted by the IP. Helps show which networks are being scanned.
Destination Cities
List of cities where scanning traffic was observed. Useful for geo-targeting analysis.
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.

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