XDR

What is XDR?

XDR (Extended Detection and Response) is an approach to threat detection and response that integrates telemetry data from multiple layers of security infrastructure into a single platform. Unlike EDR, which focuses exclusively on endpoints, XDR correlates events from endpoints, network, email, cloud and applications, creating a more complete picture of an incident.

The key value of XDR lies in automatic event correlation. A single EDR alert may not look threatening, but combined with a suspicious login from an unknown location and unusual network traffic, it reveals an APT in the lateral movement phase. XDR automatically connects these signals and presents the analyst with a ready incident for investigation.

The XDR market splits into two approaches. Native XDR (offered by a single vendor, e.g. Microsoft, Palo Alto Networks, Trend Micro) integrates the vendor’s own security products. Open XDR (offered by vendors such as Stellar Cyber, Exabeam) integrates tools from different vendors through APIs and standard data formats.

Why does it matter?

SOC teams are overwhelmed by the volume of alerts generated by independently operating security tools. XDR addresses this problem by reducing alert noise and automating event correlation. For organisations without a large analyst team, XDR can significantly reduce mean time to detect and respond to incidents (MTTD and MTTR).

Related topics

• EDR
• SIEM
• SOC