Endpoint Detection and Response (EDR)

Affordable EDR for Modern, Legacy, and Cloud Systems

Endpoint detection and response (EDR) provides continuous visibility into device and host activity to help organizations detect threats, manage cybersecurity risk, respond to attacks, and support compliance. That visibility is increasingly important as cloud adoption, distributed infrastructure, AI and automated attacks, and expanding attack surfaces change how and where organizations defend their systems.

Servers, workstations, virtual machines, cloud instances, containers, container hosts, legacy systems, and OT endpoints still run applications, process data, and execute the activity defenders need to protect. EDR and host-based security provide visibility into what is running, what is vulnerable, what changed, and what a system is doing.

Leading endpoint security systems combine intrusion detection, antivirus and antimalware, CVE and vulnerability detection and management, file integrity monitoring (FIM), and compliance scanning. Since being able to act on detected events is critical, effective EDR must also provide application control, endpoint firewalling, security logging, compliance controls, and automated response.

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Endpoint Detection and Response Controls for Security and Compliance

EDR can bring multiple security controls and sources of endpoint intelligence together to improve detection, investigation, response, and compliance.

Endpoint firewall: Controls endpoint network access and communications to support segmentation, least privilege, and containment.
Application control: Uses application allowlisting and blocklisting to control which applications and processes can run on protected systems.
Antivirus and antimalware: Identifies and blocks malicious software and suspicious activity that reaches the endpoint.
File integrity monitoring (FIM): Continuously monitors critical files and systems for unauthorized or unexpected modifications and provides valuable information about what changed.
CVE detection and vulnerability management: Identifies known vulnerabilities across endpoints so organizations can understand exposure and prioritize remediation. A software bill of materials (SBOM) and CVE correlation can provide deeper visibility into affected software components and associated vulnerabilities.
Automated and active response: Uses predefined rules and security events to rapidly respond to detected threats, reducing reliance on manual intervention.
Audit and log controls: Collects and analyzes endpoint security events to support investigations, auditing, reporting, and continuous compliance monitoring.
SIEM: Centralizes security event information and provides a graphical interface for monitoring, investigation, analysis, and reporting.
SOAR: Connects security information with orchestration and automated workflows to accelerate threat response.

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Agent-Based and Agentless EDR

Agent-based EDR typically provides the deepest endpoint visibility and the most direct detection, security control, and response capabilities because monitoring occurs on the protected system itself. This can provide detailed information about files, processes, vulnerabilities, applications, and other endpoint activity.

But an agent is not appropriate for every system. Legacy and end-of-life systems may have compatibility or resource limitations, while sensitive OT and industrial environments may need to minimize software changes.

Agentless endpoint security provides another approach for monitoring systems where installing an agent is impractical or undesirable. Supporting both approaches allows organizations to apply endpoint security according to the operational requirements of each environment rather than leaving difficult-to-protect systems unmonitored.

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EDR for Security and Compliance

EDR is also an important source of the continuous monitoring, vulnerability information, file integrity data, security logs, audit evidence, and response capabilities organizations need for cybersecurity compliance.

These controls can support security programs associated with NIST SP 800-53, NIST SP 800-171, CMMC, ISO/IEC 27001, NERC CIP, 10 CFR 73.54, PCI DSS, and other requirements.

For operational technology (OT) and industrial control system (ICS) environments, host-based and agentless security monitoring can also contribute to programs aligned with NIST SP 800-82, IEC 62443, NERC CIP-010, and related industrial cybersecurity guidance and OT compliance.

Atomic OSSEC EDR: Endpoint Security from Detection Through Response

Atomic OSSEC brings endpoint detection and response, server security, cloud workload protection, and continuous security and compliance monitoring together in one platform. Its capabilities include antivirus and antimalware, intrusion detection, real-time FIM, CVE detection, and vulnerability management. Application control, endpoint firewalling, active response, audit controls, SIEM, SOAR, and extensive security integrations provide additional layers of protection and management

Just as importantly, Atomic OSSEC is designed for diverse environments. Organizations can protect modern and legacy systems across on-premises, cloud, hybrid, air-gapped, and OT environments using agent-based or agentless monitoring as appropriate.

For organizations that need broad endpoint security without the cost and complexity associated with many enterprise EDR platforms, Atomic OSSEC provides an affordable EDR and compliance solution built to protect systems new and old.

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Endpoint Detection and Response (EDR) FAQs

What is endpoint detection and response (EDR)?

Endpoint detection and response (EDR) is a cybersecurity approach in which an organization continuously monitors endpoints for suspicious activity, security threats, and indicators of compromise. EDR combines endpoint visibility, threat detection, investigation, and automation and response capabilities to help organizations identify attacks, understand what occurred, and contain or remediate threats.

What capabilities does Atomicorp endpoint detection and response software include?

Atomic OSSEC provides endpoint detection and response capabilities including antivirus and antimalware protection, host-based intrusion detection, vulnerability detection and management, real-time file integrity monitoring (FIM), endpoint firewalling, application control, security monitoring, log analysis, and automated response, and many additional security and compliance management capabilities. It supports modern, legacy, cloud, on-premises, hybrid, and air-gapped environments, with both agent-based and agentless monitoring options.

How can EDR support security and regulatory compliance?

EDR can provide many of the technical controls and security evidence organizations need to support regulatory compliance. Continuous security monitoring, FIM, vulnerability detection, logging, audit trails, intrusion detection, and automated response can help organizations identify security issues, document activity, and demonstrate that important systems and data are being monitored and protected.

Atomic OSSEC supports security and compliance programs associated with NIST SP 800-53 and SP 800-171, CMMC, PCI DSS, ISO/IEC 27001, HIPAA, NERC CIP, and other cybersecurity requirements. For operational technology (OT) and industrial control system (ICS) environments, its monitoring, FIM, vulnerability detection, logging, and other security controls can also support programs aligned with NIST SP 800-82, IEC 62443, NERC CIP-010, 10 CFR 73.54, and related critical infrastructure and industrial cybersecurity requirements.

How does EDR support cloud security and compliance?

EDR extends security monitoring and threat detection to cloud servers, workloads, and hybrid environments, helping organizations maintain visibility as systems move beyond the traditional network perimeter. Atomic OSSEC supports cloud security posture and compliance through vulnerability detection, file integrity monitoring, intrusion detection, malware protection, security logging, automated response, and compliance monitoring across cloud, on-premises, and hybrid infrastructure.

How does EDR support defense in depth and zero trust security?

EDR provides an endpoint security layer that complements network, identity, application, and cloud security controls as part of a defense-in-depth strategy. EDR can also work alongside a web application firewall (WAF) to add application-layer protection for web applications and APIs. With a multiplatform EDR solution such as Atomic OSSEC, organizations can extend endpoint security across a broader mix of operating systems, servers, cloud workloads, and modern and legacy environments.

For zero trust security, EDR provides continuous endpoint visibility, threat detection, and the ability to enforce security controls and respond automatically to detected threats. In Atomic OSSEC, capabilities such as application control, endpoint firewalling, vulnerability management, file integrity monitoring, and automated response can support least privilege, limit attack paths, and reduce the impact of compromised systems.

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