ExtraHop named a Leader in the 2025 Forrester Wave™: Network Analysis And Visibility Solutions

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DETECTION OVERVIEW

Request to Unknown Public DNS Server

Risk Factors

To help secure the network, workstations are often configured to communicate with approved DNS servers. DNS-based attacks include redirecting traffic to malicious domains or beaconing to a command-and-control server through a DNS tunnel. Misconfigured clients, mobile devices, or guest devices on your network might communicate with unknown public DNS servers. The impact to a business can be low, but this activity should be examined before it enables critical and costly attacks.

Category

Hardening
Next in Hardening: SMBv1 Connection

Attack Background

Mitigation Options

Configure all workstations to send queries to an internal DNS server that filters or blocks suspicious domains

Associated content

Announcing The Forrester Wave™: Network Analysis And Visibility Solutions, Q4 2025

Network analysis and visibility solutions remain underrepresented in enterprises. Find out why in this preview of a new Wave report.

Report

ExtraHop® Named a Leader in First-Ever Gartner® Magic Quadrant™ for Network Detection and Response — ExtraHop

ExtraHop® Named a Leader in First-Ever Gartner® Magic Quadrant™ for Network Detection and Response

News

Detections

Visit this resource for more information.

Docs

The 2025 ExtraHop Global Threat Landscape Report: The Alarming Reality of Threat Actor Dwell Time and Deeper Network Access — ExtraHop

This analysis exposes the critical link between an organization's lack of internal visibility and the escalating cost of compromise, demanding an urgent re-evaluation of how core business assets are protected.

Blog

ExtraHop RevealX MITRE ATT&CK Coverage 2024 — ExtraHop

Learn why you need to be wary of the claims certain network detection and response providers make about their coverage against the MITRE ATT&CK framework.

Blog

MITRE ATT&CK - Network Detection & Response with RevealX — ExtraHop

Learn how NDR from RevealX helps security teams detect and investigate more adversary TTPs in the MITRE ATT&CK framework than rule-based tools.

External
Periodic Table of Use Cases

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