XDR: The solution to block all attacks

XDR, an Essential Technology Today

To handle the volume, velocity, and variety of data, Extended Detection and Response (XDR) technologies are required to collect and process security data at scale across hybrid IT environments. SIEM platforms have fulfilled this role for many years, but marketers have coined a new term: XDR, which closely mirrors SIEM capabilities (in fact, it is fundamentally the same concept). Furthermore, because EDR solutions cannot process data beyond Windows, Linux, and other endpoints, XDR provides a framework to explain that data sources are being gathered beyond these endpoints. XDR is therefore the natural evolution of EDR.

XDR Definition: What Is Extended Detection and Response?

Extended Detection and Response (XDR) is a new holistic approach to threat detection and response that delivers comprehensive protection against cyberattacks, unauthorized access, and malicious activities. According to Gartner, XDR is "a SaaS-based security threat detection and incident response tool that natively integrates multiple security products into a cohesive security operations system that unifies all components." In reality, there is nothing fundamentally new here: it essentially performs the role of a SIEM, augmented with endpoint, Windows, and Linux log data to justify the new terminology.

Key Benefits of Extended Detection and Response (XDR)

XDR enables organizations to move beyond traditional detection controls by delivering a streamlined, holistic view of threats across the entire technology landscape. XDR provides actionable, real-time threat intelligence to achieve superior, faster outcomes. The 3 main benefits of Extended Detection and Response (XDR) are:

• Enhanced protection, detection, and response capabilities
• Increased staff productivity
• Reduced total cost of ownership (TCO) for effective security threat detection and response.

The XDR solution promises to consolidate multiple point products into a single, cohesive, unified platform for security incident detection and response.

What Is the Difference Between XDR and Traditional SIEM?

Traditional SIEM platforms are a foundational pillar of Security Operations Center (SOC) technologies. They collect log data from dozens or hundreds of security tools, correlate events, and generate actionable alerts. While traditional SIEMs have limited detection scope, "next-generation" SIEMs are augmented with UEBA and threat intelligence. In such scenarios, they can outperform XDR platforms. As a result, the boundary between modern SIEM and XDR is extremely narrow.

To simplify: an XDR typically integrates an EDR component, enabling immediate remediation. However, certain SIEM platforms—such as Reveelium, for example—are also fully capable of executing remediation workflows.

Behind this complex jargon, the cybersecurity industry has often overcomplicated straightforward concepts:

• The more data ingested from diverse sources (whether via SIEM or XDR), the stronger the security posture,
• Incident remediation can be executed directly by endpoint agents (EDR),
• Event management is frequently orchestrated via a SOAR (which will be addressed in a future article).

It is important to remember that optimal protection relies on multi-layered detection engines: Correlation, UEBA, and Threat Intelligence. In this domain, marketing claims are seldom fulfilled.

How Are XDR and SIEM Connected?

XDR can complement traditional SIEM solutions by bridging critical operational gaps:

Interaction with security tools: not only pulling event data, but also activating defensive capabilities to respond to incidents (remediation).

What Is the Difference Between EDR and XDR?

XDR is the logical evolution of Endpoint Detection and Response (EDR) solutions into a primary incident response platform. Before examining their differences, let us review their commonalities:

EDR vs. XDR: Key Similarities

Both EDR and XDR solutions are designed to replace traditional, reactive cybersecurity approaches. Consequently, EDR and XDR share several key characteristics, including:

A proactive approach:

Traditional security solutions typically focus on detecting and remediating active threats. EDR and XDR solutions strive to prevent security incidents through deep telemetry collection, advanced data analytics, and threat intelligence to identify threats before execution.

Rapid threat response:

Both EDR and XDR support automated threat detection and response workflows. This enables organizations to minimize the cost, operational impact, and collateral damage of a cyberattack through rapid containment and remediation.

Threat Hunting: Threat hunting drives proactive security operations, allowing analysts to uncover and remediate latent vulnerabilities or stealthy threats before attackers can exploit them. EDR and XDR provide deep visibility and seamless data access, significantly accelerating threat hunting efforts.

EDR vs. XDR: Key Differences

Despite their common traits, EDR and XDR take distinct architectural approaches to cybersecurity. Here are 2 key differences between EDR and XDR:

Scope of Focus: EDR focuses exclusively on endpoint protection, providing deep visibility and threat prevention for individual host machines. Conversely, XDR adopts a broader scope, integrating endpoint security with cloud workloads, email security, network telemetry, and other controls—much like a SIEM.

Integration Architecture: EDR solutions can deliver best-in-breed endpoint protection, requiring organizations to integrate them manually with existing point solutions. XDR is architected to natively unify threat visibility and incident management within a single platform, substantially streamlining an organization's security architecture.

How Does It Differ from Managed Detection and Response (MDR)?

Managed Detection and Response (MDR) is endpoint security delivered as a service. This managed service operates EDR security technologies on behalf of organizations, covering 24/7 detection and response. Typical service scopes include:

Continuous monitoring
Threat hunting
Threat and alert prioritization (SOAR)
Managed investigation services
Guided response
Managed remediation

The primary advantage of an MDR service is its ability to rapidly identify threats and mitigate their impact without requiring dedicated in-house staff. This is especially vital given the global shortage of skilled cybersecurity professionals and the persistent talent gap, particularly in securing cloud-native assets and architectures.

EDR, MDR, XDR: In Summary

EDR serves as the foundational threat detection and monitoring tool for Windows and Linux endpoints. Traditional antivirus, while necessary, now catches only around 4% of modern attack techniques. EDR covers slightly over 40% of MITRE ATT&CK techniques. The solution deploys software agents or sensors on endpoints to capture telemetry, which is then transmitted to a centralized platform for analysis.

MDR is essentially an EDR deployed as a turnkey managed service. It oversees endpoint security operations, focusing on threat mitigation, eradication, and remediation through a dedicated team of seasoned security analysts.

XDR expands EDR capabilities beyond endpoints to ingest telemetry from firewalls, proxies, DNS, and more. The XDR platform scales across the entire enterprise infrastructure, centralizing ingestion, analysis, and pipeline workflows across existing security tools to enhance visibility into stealthy, advanced threats while orchestrating unified response actions.

In doing so, XDR functions much like a SIEM. When procured as a managed service, XDR also delivers direct access to expert threat hunting, threat intelligence, and digital forensics specialists.

Which Solution Should Your Organization Select?

Every organization has distinct IT security requirements. With cybersecurity being mission-critical, selecting a security platform that provides appropriate coverage tailored to your specific organizational risk profile is paramount.

Choose an EDR solution if your organization

• wants to improve its posture and level of endpoint security beyond antivirus.
• has an Infosec team capable of acting on alerts and recommendations generated by the EDR solution.
• is in the early stages of developing a comprehensive cybersecurity strategy and wants to lay the foundation for a scalable security architecture.

Choose an MDR or MSSP solution if your organization

• does not have an in-house cybersecurity team
• lacks a mature detection and response program capable of rapidly remediating advanced threats using existing tools or resources.
• wants to acquire new capabilities and enhance maturity without hiring additional staff.
• struggles to bridge skills gaps within the IT team or to attract highly qualified, specialized talent.
• requires proactive protection that stays ahead of the latest threats targeting organizations.

Choose XDR or Next-Generation SIEM if your organization

• wants to enhance advanced threat detection capabilities
• aims to accelerate cross-domain analysis, investigations, and threat hunting from a single console.
• experiences alert fatigue caused by a fragmented or siloed security architecture.
• wants to accelerate response times to security alerts and threats.
• aims to maximize the return on investment of its entire security toolset.

To understand the detection capabilities of these different technologies, explore the insights in our study: Who is the winner? The MITRE Matrix-based ranking of the best protection technologies

In conclusion, the approach that provides maximum protection remains the deployment of a UEBA TH SIEM coupled with an EDR.

Discover the ITrust XDR solution

Backed by 15 years of cybersecurity expertise, ITrust provides a unified XDR solution capable of covering 90% of MITRE ATT&CK threats. As a result, your teams enhance both operational efficiency and overall performance. Prevent, detect, and respond to advanced threats through automation, machine learning, and Threat Intelligence.