Cybersecurity Built for Red Hat Linux

Kernel-Level Security for Critical Infrastructure

Other security solutions monitor user space or network activity. We monitor one level down, at the core of the system—file system calls—to catch attacks where they happen: at the file level.

In partnership with:

Why Sentricore?

With over 30,000 new vulnerabilities disclosed yearly, and 25% of them found below the user space—and for this, you need comprehensive kernel monitoring.

Don’t be blind to attacks!

No Blind Spots

While others monitor file system activity at a higher level, SentriCore provides visibility into the underlying *file system calls—the true source of malicious activity—below the user space and network activity that traditional systems rely on.

Proactive Security

Ensure comprehensive security from day one with our pre-built MITRE ATT&CK rule templates, providing immediate protection against known threats. Tailor your defenses to your specific needs by creating custom rules.

Massively Faster Threat Detection

Our granular policy engine detects attacks at the file system call level, reducing the noise of false positives.

Seamless Integration

SentriCore integrates effortlessly with leading SIEM tools like Splunk, Sumo Logic and Microsoft Sentinel, amplifying your existing security investments.

Automated Security Operations with Ansible Automation Platform

Streamline deployment, management, response, and remediation of SentriCore across your Red Hat environment with Ansible Automation Platform.

AI is Increasing Attack Frequency

Attacks targeting Linux systems are on the rise, with a 130% increase in exploit attempts in the last year alone. Is your kernel protected?

What Makes Cyber Castle Different?

File-Centric Threat Detection

We focus on file system call activity—where cyberattacks ultimately aim—unlike competitors that prioritize network or process monitoring or wait until the file is accessed.

File System Call Monitoring

Unlike EDR, FIM, and DLP solutions that focus on file system activity, SentriCore monitors the underlying file system calls. This granular visibility is critical for securing OT environments, detecting and preventing threats before they can impact sensitive operational data.

Deterministic, Rule-Based Security

Our approach doesn’t rely on anomaly detection or probabilistic models—it delivers consistent, predictable protection for OT systems against known attack patterns.

Low System Overhead

The lightweight rule engine ensures minimal performance impact, making it ideal for high-performance OT workloads, legacy industrial systems, and critical infrastructure.

Immediate Deployment, No Guesswork

Pre-defined policy rule templates allow rapid implementation, ensuring out-of-the-box security for Red Hat environments and mission-critical OT applications.

Legacy Red Hat Support

We protect industrial and OT systems running RHEL 7.6 back to version 5—even versions Red Hat no longer supports.

“They see the attack succeed. We see the attack attempt.”

Tim Reilly, Cyber Castle Founder & CEO

The Full Picture of Linux Threats

Understanding the attack surface in both user and kernel space is crucial for comprehensive Linux security. To truly protect your critical systems, you need visibility into the core of your operating system – the lower level of the kernel.

Beyond Monitoring, Automated Response

Powered By Red Hat Ansible Automation Platform

Kernel-level monitoring is essential for securing any Linux environment, but effective response is equally crucial. SentriCore, integrated with Ansible, empowers you to take automated action—even in challenging environments like air-gapped, intermittently connected, and distributed systems. This allows for critical responses, such as instantly disabling a compromised user, regardless of network connectivity.

Critical Infrastructure Requires Kernel-Level Monitoring

Air-Gapped Systems: Even systems that are isolated from external networks can be vulnerable to insider threats or malware introduced via removable media. Kernel-level monitoring provides an essential layer of defense within these secure environments.
Intermittently Connected Systems: Devices with sporadic network access, such as remote sensors or mobile equipment, may not be consistently protected by traditional security tools. Kernel-level monitoring ensures continuous security, regardless of connectivity status.
Remote Systems: Managing and securing distributed Linux systems can be challenging. Kernel-level monitoring provides centralized visibility and control, enabling you to detect and respond to threats across your entire infrastructure.

Air Gapped

Intermittently Connected

Remote

Understanding Linux Attack Vectors

User Space

Web browser: Firefox, Chrome
Text editor: Vim, Nano
System utilities: ls, grep, top
User Applicaitons: Games, Offices suites
Shell: bash, zsh
Libraries: glibc, OpenSSL

Buffer OverflowsSQL Injection
Cross-site Scripting (XSS)
Files System Vulnerabilities
Denial of Service (DDoS)
Application Exploits

Attacks Applications and User Data

System Call Interface

Kernel Space

Process Management: fork, execve, wait
Memory Management: malloc, free, mnap
File System: open, read, write, close
Network Stack: socket, bind, connect, send recv
Device Drivers: Keyboard, Mouse, Network card
Security: Access control, Authentication
Hardware Abstraction

Memory CorruptionDriver VulnerabilitiesSystem Call HijackingDirty Cow VulnerabilitiesKernel Exploits

Attacks Entire System

“Most Linux security solutions focus on network traffic or process execution or file system events. But attacks are ultimately about data—stealing, corrupting, or encrypting it. That’s why Cyber Castle monitors the critical file system call activity that indicates malicious activity.”

Tim Reilly, Cyber Castle Founder & CEO

Limitations of User Space Monitoring Alone

Restricted Access: User space applications have limited access to system resources and hardware. They can’t see or interact with critical low-level activities happening within the kernel.
Incomplete Visibility: This limited access creates blind spots, leaving your system vulnerable to sophisticated threats that operate at a deeper level.
Evasion Potential: Malware can hide from user space monitoring by manipulating information or operating below its level of access.
Performance Overhead: Context switching between user and kernel space can create performance bottlenecks and cause you to miss critical events.

Advantages of
Kernel-Level Monitoring

Unrestricted Access

Gain complete visibility into system resources, hardware interactions, and low-level operations.

Comprehensive Insights

See the full picture of system activity, including threats hidden from user space.

Enhanced Performance

Eliminate context switching overhead for more efficient and effective monitoring.

Early Detection

Detect threats at their source, before they can escalate and cause damage.

Evasion Resistance

Make it significantly harder for malware to hide its activities.

HOW IT WORKS

Automated Red Hat Linux Security, From Kernel to Cloud

Gain unparalleled visibility and control with the only policy-based solution that extends data security monitoring to the kernel level, fortifying your critical infrastructure.

Deep Kernel Visibility

Cyber Castle provides unparalleled visibility into your Linux system call activity.
Full integration with the Red Hat portfolio (RHEL, Ansible, OpenShift, etc.) ensures comprehensive security across your Red Hat environment.
Backwards compatibility with older Linux distributions (CentOS, Alma, Rocky, Fedora) protects your legacy systems.
Support for both traditional and modern workloads secures your entire infrastructure.

Real-time Threat Detection and Response

Reduce mean time to detection (MTTD) and mean time to remediation (MTTR) with automated threat detection and response.
Minimize false positives and streamline security operations for maximum efficiency.
Integrate seamlessly with leading SIEM, SOAR, and XDR platforms (Splunk, Microsoft Sentinel, CrowdStrike, etc.) to amplify your existing security investments.

Built for the Cloud & Easy Deployment

Cloud-first design with support for all major cloud providers (AWS, Azure, Google Cloud, IBM).
Easy deployment with pre-configured policy templates for compliance standards like NIST and MITRE ATT&CK.
API-driven integrations provide end-to-end visibility and control across your hybrid and multi-cloud environments.

Compliance and Standards

NIST FIPS 140-2 certified and compliant, meeting stringent security requirements for sensitive data.
Adherence to the MITRE ATT&CK framework ensures comprehensive protection against known tactics and techniques.

Who We Serve

Our solutions are designed to protect data within critical infrastructure, specifically OT, ICS, and SCADA systems. We serve organizations in essential industries, including energy, healthcare, finance, manufacturing, and government, where data is the primary target.

If you rely on Red Hat Linux and need a data-centric, deterministic approach to security, Cyber Castle is your trusted partner.

Energy and Utilities

73% of IT security professionals who work in utilities say they’ve experienced a public security breach.

Civilian and Defense

79% of nation-state attackers target government agencies, non-government organizations, and think tanks.

Transportation

78% of ICS facilities are not yet protected using MITRE ATT&CK industry standard framework.

Healthcare and Life Sciences

239% increase of large breaches involving hacking over the last four years.

Financial Services

74% of attacks compromise personal user data.

Manufacturing

32.43% largest segment of attacks in the market.