In this blog

  1. Introduction
  2. What is SIEM?
  3. Managed SIEM
  4. SIEM vs Managed SIEM
  5. In summary
Photo of Harvina Bains

Harvina Bains

Security Blogger

18th April 2023

Creating a SIEM system for your business can be a tricky task, particularly when deciding whether to build it in-house or outsource to a managed SIEM service. In this blog, we’ll explore the options and explain how outsourced SIEM can make your security setup easier and more efficient in the long run.

What is SIEM?

First conceptualised in the early 2000s, Security Information and Event Management (SIEM) combines log monitoring and event management systems to detect and respond to security threats in real-time. A SIEM tool collects and analyzes security event data from sources such as firewalls, servers, and network devices, to identify security incidents and provide actionable insights to security teams.

SIEM solutions typically include:

  1. Log collection: SIEM log monitoring collects logs from different sources and correlates them to identify security incidents.
  2. Event management: SIEM monitoring services analyse the collected logs and events to identify security incidents and allows businesses to take necessary actions.
  3. Threat detection: SIEM threat intelligence uses behavioural analysis to detect security threats and vulnerabilities.
  4. Reporting: SIEM security logs generate reports to help organisations meet compliance requirements and provide insights into security incidents.

By doing all the above, SIEM solutions help stay ahead of potential cyber threats by quickly identifying suspicious activity and providing context for any necessary remediations. This helps organisations to protect sensitive data and systems from unauthorised access.

SIEM threat intelligence is essential for businesses looking to maintain a robust security posture and defend against the ever-evolving landscape of cyber threats. However, it can be complex to manage a SIEM platform and it requires a high level of expertise to operate effectively. This is where the difference between an outsourced managed SIEM service and unmanaged (in house) SIEM comes into play.

SIEM managed service

Managed SIEM is a security service that provides all the benefits of SIEM without the burden of managing the technology. SIEM service providers use a team of security experts who handle everything from deployment and configuration to maintenance of the SIEM infrastructure. Managed SIEM providers usually include 24/7 monitoring, alerting, and a basic level of incident response, ensuring that any security issues are promptly addressed.

Managed SIEM services also include additional security features such as threat intelligence and compliance reporting. The benefit of outsourcing to a managed SIEM provider is that it allows your organisation to focus more on core business activities, knowing that your security is taken care of by seasoned professionals.

Managed SIEM services offer several benefits, such as:

  1. Expertise: Managed SIEM providers have experienced security analysts who are trained to manage and analyse security-related data, helping to reduce alert fatigue.
  2. 24/7 monitoring: SIEM service providers monitor security-related data 24/7, providing organisations with continuous visibility into their security posture.
  3. Rapid response: SIEM platforms can contextualise security information on your behalf to reduce false positives and help you quickly respond to genuine security incidents. They’ll provide actionable remediation advice on the steps needed to eliminate threats.
  4. Cost savings: Managed SIEM services eliminate the need for organisations to invest in dedicated security personnel and infrastructure.

In-house vs Managed SIEM

When deciding between an unmanaged or managed SIEM solution your organisation should consider the following:

  1. Resources: Does your organisation have the resources and expertise to deploy a SIEM platform and manage it 24/7 in-house? If not, a managed SIEM service may be a better option, especially if you don’t already have your own SOC team.
  2. Budget: Implementing and maintaining a SIEM solution in-house can be expensive. SIEM monitoring services are often a more affordable solution to managing security operations internally, as you are avoiding the overhead of having your own security team and the large investment required to deploy and maintain a SIEM solution.
  3. Control: Does your organisation require complete control over SIEM monitoring? If so, an in-house SIEM solution may be the better option, however many managed SIEM providers will still give you access to granular log search capabilities and will work with you to adapt your service to the needs of your business.
  4. Scalability: What are the growth ambitions of your business? Managed SIEM solutions are easily scalable, allowing businesses to adjust their security needs and capacity as your environment grows.
  5. Compliance: Managed SIEM services can help your business meet compliance requirements, such as PCI DSS, ISO 27001 and HIPAA, by providing continuous security monitoring and reporting. Many vendors will also retain your logs for a certain period of time for compliance purposes.

In summary

SIEM is an effective solution for managing security events and incidents. While deploying and managing a SIEM platform yourself is a credible option if you have your own SecOps team, it will still require a significant investment in time, resources and expertise to manage effectively. Outsourcing everything to a SIEM provider is a much more affordable and scalable alternative, as your organisation will get access to a dedicated team of security experts who will oversee the platform on your behalf. You can get back to managing other areas of your business and get alerted if there is a genuine security risk that requires your attention.

Ultimately, the choice between an outsourced SIEM service and managing it yourself will depend on your organisation’s specific needs, resources, and budget, but with cyber attacks becoming increasingly sophisticated, businesses need to consider SIEM as a critical part of their security strategy.

Photo of Harvina Bains

Harvina Bains

Security Blogger

Share this article

Protect your business from cyber attacks

With Defense.com Managed SIEM, your network will be monitored 24/7/365 for suspicious activity, helping to identify threats and prevent breaches. We’ll help you quickly improve your security posture with our fully managed service.

Related resources