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

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DETECTION OVERVIEW

New External IoT Connection

Risk Factors

Internet of Things (IoT) devices are common targets for attackers because of well-known vulnerabilities such as weak default passwords, unsecured and outdated services, and exploitable firmware. Some IoT devices can be easily compromised and converted into an entry point into the network. Any indicator of unusual outbound connections from an IoT device should be examined before it facilitates critical and costly attacks.

The system might change the risk score for this detection.

Category

Command-and-Control
Next in Command-and-Control: New Local DNS Server Activity

Attack Background

IoT devices such as internet-connected phones, printers, and cameras can be an attack vector for gaining access to a network. Adversaries can choose from a variety of techniques to compromise IoT devices, from brute force attacks to unknown (zero-day) exploits. After gaining control of an IoT device, the attacker can maintain command-and-control (C&C) communication with the victim and pivot to other internal network devices. The malicious C&C communication often occurs over common protocols, blending in with normal traffic.

Mitigation Options

Quarantine the device while checking for indicators of compromise

Regularly apply firmware updates to reduce the number of vulnerabilities that can be exploited

Ensure updates are legitimate by installing over a secured channel and performing firmware integrity checks when possible

Implement network segmentation and the principle of least privilege on accounts to minimize the damage caused by a compromised device

Review authentication methods and enforce policies for secure credential creation, strong authentication practices, and multi-factor authentication

Strengthen the security of IoT devices by updating default or weak passwords, blocking exposure to the internet, closing unused ports, and enhancing physical security

MITRE ATT&CK ID

Associated content

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