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
HTTP Method
HTTP methods used (e.g., GET, POST). Provides context on attacker request.
HTTP Path
Web paths targeted during scanning (e.g., /robots.txt, /admin). Reveals reconnaissance goals.
HTTP Request Authorization
Authorization headers observed in HTTP requests. May reveal brute-force attempts.
HTTP Request Cookies
Cookies included in HTTP requests. Adds context on reconnaissance or exploit attempts.
HTTP Request Headers
Headers used in HTTP requests. Useful for tool fingerprinting.
HTTP Request Origin
Origin IPs or addresses set in HTTP headers. May indicate spoofing.
HTTP Useragent
User-Agent strings observed. Useful for identifying attacker tools or crawlers.
Hassh Fingerprint
Fingerprint hash of SSH client behavior. Helps identify SSH attack tools.
Hassh Port
Port associated with observed SSH behavior. Adds protocol context.
ID
Unique tag identifier.
ID
Unique identifier for the record. Used to track and reference the vulnerability consistently across systems and reports.
IP
The observed IP address itself. Primary entity to investigate or correlate across alerts.
Intention
Tag’s intent classification: benign, malicious, suspicious, or unknown. Adds risk context.
JA3 Fingerprint
JA3 TLS fingerprint of client behavior. Useful for identifying attack tools, actors, botnets, and campaigns.
JA3 Port
Port associated with observed JA3 TLS activity.
Last Seen
Last date the IP was observed by GreyNoise sensors. Indicates recency of activity.
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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