What a SIEM does and when an SMB should consider one
A SIEM collects and analyses security events across systems. Start with the detection and investigation gaps, then decide how the service will be operated.
The cover image is an AI-generated editorial illustration. Screens and documents are illustrative concepts.
Security information and event management, SIEM, collects and analyses events from different systems. It can support detections, investigations and a shared view of activity across endpoints, identities, applications and network services.
Whether an SMB needs one depends on its systems and requirements. Employee count is not a reliable substitute for that assessment.
Start with the questions you cannot answer
List important incidents and identify the evidence needed to investigate them. Can you trace a privileged sign-in to a cloud change? Can you connect a suspicious application action with the account and device behind it?
Compare those needs with existing collection and detection. EDR provides endpoint visibility, but identity, application and network coverage depends on the wider setup. Do not assume that installing an endpoint sensor covers every sign-in or SaaS event.
A SIEM can help connect relevant sources. It cannot analyse data that was never collected or interpret an application event accurately without suitable parsing and context.
Separate retention from detection
Keeping logs and detecting threats are related tasks, but they are not identical. A requirement to retain information does not automatically require a SIEM or a full year of immediately searchable data.
Write down the applicable contract or policy, the sources it covers and the required access time. Determine retention from that requirement and the investigation need. Avoid treating a generic compliance label as a universal duration.
Protect the logs themselves with access controls and appropriate integrity measures. Decide who can view sensitive information and how it will be removed when no longer required.
Include the people and maintenance
Connectors, parsers and detection rules need maintenance as systems change. Someone must investigate alerts and decide what to do. Price that work alongside storage and ingestion.
Falcon Next-Gen SIEM is CrowdStrike’s offering for bringing third-party data into its security workflows. Existing Falcon use may help the integration case, but the actual source coverage and operating cost still need evaluation.
Before procurement, produce a source list, a set of detection use cases, retention requirements and an owner. The next-generation SIEM guide explains what to examine in the product claims and quote.
