When choosing a SIEM solution, businesses should consider organizing a workshop, either internally or alongside a SIEM partner, to define and agree on the project scope and timeline. To determine the deployment’s scope and timeline, you must identify, and more importantly prioritize, an initial list of use cases to dictate what the necessary log sources may be. It is also essential to agree upon a timeline for deployment to ensure the SIEM security aligns with the business’s goals.
The four key questions to consider in the process of choosing a SIEM solution are;
- WHAT applications to focus on?
- HOW to respond when threats are detected?
- WHERE are the most critical threats to your environment?
- WHY are these the most critical threats, and what is the impact of a breach?
Determine your business-critical data sources
Once you have a handle of the ideal project scope, you can then identify log sources within the scope to determine how to obtain the relevant data needed. For example, firewalls, intrusion detection systems, and antivirus software serve as prime data sources for SIEM security use cases. But there are many more, including routers, web filters, domain controllers, application servers, databases, and other digitally connected assets. It is crucial that you prioritize the sources included to ensure the SIEM provides the desired data to support the selected use cases.
Identify the high priority events and alerts
When it comes to protecting an organization against insider and external threats, security teams face an ever-growing list of security events that need to be analyzed and acted upon. To break through the noise, SIEM software can be used to make events and data more insightful. Still, businesses must first determine their high priority events and how to derive them from applications and devices within the infrastructure. This way, security teams can use the SIEM to spend more time on incidents and alerts that may be more critical to the business and its data.
Pinpoint your key success metrics
A successful SIEM implementation aligns with your business goals. Key success metrics must be determined before deployment to ensure maximum ROI. For example, reducing data theft or improving how businesses detect potential breaches or insider threats may be metrics to establish. But there are many others. Companies must determine what success means for them and how SIEM security use cases can be used to achieve it.