Build 558 did not simply fix bugs; it introduced architectural shifts that are still relevant today.
Policies determine how the antivirus behaves.
✅ Yes, if:
❌ No, if:
Build 558 requires specific configurations to function optimally.
Several specific improvements distinguish Build 558 from its predecessors (e.g., Build 526 or 556):
Symantec Endpoint Protection 14.3 (Build 558), released on May 5, 2020, introduced several significant security and management enhancements designed to modernize endpoint defense.
A standout feature of this specific build is the integration of the Antimalware Scan Interface (AMSI). This allows third-party application developers to request real-time scans of dynamic script-based malware, such as PowerShell, JavaScript, and VBScript, before they are executed. If the Symantec client identifies malicious behavior during the AMSI call, it triggers an "Access Denied" verdict and stops the script from running. Key Features of Build 14.3.558.0000
Enhanced AMSI Support: Protects against dynamic scripts and "living-off-the-land" attacks by routing third-party script scan requests directly to the Symantec Endpoint Protection client.
Azure Integration: Includes a new Virtual Machine Wizard for Azure, simplifying deployment in cloud environments.
Performance Optimization: Features a reduced client size and more efficient memory usage compared to previous 14.x versions. symantec endpoint protection 14.3 build 558
Core Security Layers: Continues to provide foundational protection including Antivirus, Firewall, and Intrusion Prevention.
Simplified Client Deployment: For managed environments, administrators can use the Symantec Endpoint Protection Manager to configure and push this specific build to client machines.
Detailed installation guidelines and build-specific fixes for this version can be found on the Broadcom Support Portal.
Configuring Symantec Endpoint Protection to Communicate ... - IBM
The standout feature of Symantec Endpoint Protection (SEP) 14.3 Build 558 (the initial 14.3 release) is the Antimalware Scan Interface (AMSI) integration, which allows the software to block dynamic script-based malware from third-party applications like PowerShell, JavaScript, and VBScript. Key Features of Build 14.3.558
Enhanced Script Protection: Uses Windows AMSI to scan user-provided scripts in real-time, blocking malicious behavior before execution.
Scan Process Separation: The antivirus scan now runs as a separate service from the main non-security service, improving memory efficiency and stability.
Microsoft Edge Support: Added browser intrusion prevention support for Edge, applying IPS signatures to inbound and outbound traffic.
Simplified Exceptions: You no longer need to manually exclude "known risks"; the policy focus shifts to SONAR behavioral-based exclusions.
SQL Server 2019: First version to introduce official support for Microsoft SQL Server 2019 databases. Important Release Notes Release Date: May 5, 2020. Build 558 did not simply fix bugs; it
Management Requirement: To update clients to this build, the Symantec Endpoint Protection Manager (SEPM) must also be upgraded to version 14.3.
Deployment: Includes a client-only patch for easier upgrading of existing endpoints. Comparison with Newer Versions
While 14.3.558 was a major step, Broadcom TechDocs shows that later "Refresh Updates" (RU) added critical capabilities: 14.3 RU1: Enhanced parsing for Excel-based threats. 14.3 RU3: Support for Windows 11 and Windows Server 2022.
14.3 RU8: Introduction of Adaptive Protection and enhanced EDR.
💡 Key Takeaway: Build 558 is best known for fixing the performance "overhead" of previous versions by decoupling the scan process from the management agent. If you'd like, I can: Provide the system requirements for this specific build.
Check if there are newer patches available for the 14.3 branch. Help with troubleshooting an upgrade from version 14.2. Client only patch Endpoint Protection 14.3 (14.3.558.0000)
Symantec Endpoint Protection 14.3 Build 558: A Comprehensive Review
Symantec Endpoint Protection (SEP) is a leading security solution designed to protect businesses from various types of cyber threats. The latest version, SEP 14.3 Build 558, offers a range of advanced features and enhancements to provide robust protection for endpoints, networks, and data. In this article, we will delve into the details of SEP 14.3 Build 558, exploring its key features, system requirements, installation process, and benefits.
Overview of Symantec Endpoint Protection
Symantec Endpoint Protection is a comprehensive security solution that provides multi-layered protection for endpoints, including laptops, desktops, mobile devices, and servers. It combines the power of Symantec's antivirus, anti-malware, and firewall technologies with advanced threat detection and prevention capabilities. SEP helps organizations protect their sensitive data, prevent cyber attacks, and ensure compliance with regulatory requirements. Host Integrity (Firewall):
What's New in SEP 14.3 Build 558
SEP 14.3 Build 558 is a significant update that offers several new features, enhancements, and bug fixes. Some of the key highlights of this build include:
Key Features of SEP 14.3 Build 558
SEP 14.3 Build 558 offers a range of key features that make it a robust endpoint security solution. Some of the notable features include:
System Requirements for SEP 14.3 Build 558
To ensure smooth installation and operation of SEP 14.3 Build 558, the following system requirements must be met:
Installation Process for SEP 14.3 Build 558
The installation process for SEP 14.3 Build 558 is straightforward and can be completed in a few steps:
Benefits of SEP 14.3 Build 558
SEP 14.3 Build 558 offers a range of benefits for organizations, including:
Conclusion
Symantec Endpoint Protection 14.3 Build 558 is a comprehensive security solution that provides robust protection for endpoints, networks, and data. With its advanced features, such as improved threat detection and prevention, enhanced behavioral analysis, and increased visibility and control, SEP 14.3 Build 558 is an ideal solution for organizations looking to improve their security posture and reduce the risk of cyber attacks. By understanding the key features, system requirements, installation process, and benefits of SEP 14.3 Build 558, organizations can make informed decisions about their endpoint security needs and take steps to protect their sensitive data and assets.