What is Agentless Detection in modern XDR systems?

Agentless detection refers to the ability to detect threats on devices without installing a dedicated security agent. In modern XDR systems, agentless detection uses network access, system queries, or integrations to collect security data from endpoints. Agentless scanning helps organizations extend threat detection coverage, especially for unmanaged or unsupported devices.

Why do some environments require agentless detection?

Not all devices in an organization can support security agents. Some systems operate as unmanaged, restricted, or temporarily connected devices. This creates visibility gaps in threat detection because security teams cannot continuously monitor certain endpoints.

Common scenarios where agentless detection in XDR is required include:

• Devices that do not allow third-party agent installation
• Short-term or unmanaged endpoints connecting to the network
• Legacy systems with compatibility limitations

How does agentless scanning work in XDR?

Agentless scanning allows XDR platforms to collect security data without deploying software on the endpoint.

• Establish remote access or integration – The XDR platform connects to endpoints using network protocols, APIs, or system credentials.
• Collect system and security data – Information such as running processes, system configurations, and potential vulnerabilities is retrieved.
• Analyze collected data – The platform evaluates the data to identify suspicious activity or security risks.
• Generate alerts or findings – Any detected issues are reported for further investigation.

Unlike continuous monitoring, agentless detection typically works through periodic scans or on-demand data collection.

Where agentless detection fits in XDR strategy

Agentless detection in XDR is not a replacement for agent-based monitoring. Instead, it complements it by extending visibility to devices that cannot be monitored continuously. Agent-based scanning provides deeper and real-time telemetry, while agentless scanning helps ensure that no device remains completely unmonitored. A combined approach improves overall threat detection coverage across the environment.

How Hexnode XDR supports endpoint monitoring

Effective agentless scanning requires security teams to identify which devices they actively monitor and which they do not. Maintaining visibility across endpoints is essential for identifying gaps in coverage.

Hexnode XDR helps administrators track endpoint activity, monitor device status, and review detected threats. This helps security teams maintain control over managed devices and identify areas that require additional monitoring.

FAQs

1. What is agentless scanning?

Agentless scanning is a method of collecting security data from devices without installing a software agent on them.

2. Is agentless detection as effective as agent-based detection?

It provides limited visibility compared to agent-based monitoring, which offers continuous and deeper telemetry.