Security information and event management (SIEM) is a solution for threat detection, risk prevention, and cyber security best practices. According to IBM, the average cost of a data breach is now $3.4 million, and experts say the cost of cybercrime is reaching $6 trillion annually, and that number continues to grow. New methods to breach systems are always evolving, and so are the efforts to proactively prevent them. In this guide, we’ll delve into what SIEM is, how it works, major benefits, and what to look for in a modern SIEM solution.
SIEM stands for Security Information and Event Management, and is essentially security software that aggregates logs and event data generated by all users, servers, networking devices, and firewalls in order to monitor and analyze all security-related events in an organization’s infrastructure.
Similarly referred to as SIM or SEM, these have often been used interchangeably.
In recent years, SIEM has become a combination of SIM and SEM, and the general term describing everything from event log management and analysis, to actioning and reporting on security events.
The first process is collecting event data that is generated by host systems, security devices, and applications throughout an organization's infrastructure and aggregating them into a centralized platform. Learn more about event sourcing
The SIEM software then detects and categorizes the data so that it can easily recognize security incidents and events (malware, security attacks, password resets, unauthorized access).
The ability for SIEM to be efficient and correct at matching logs and events generated by multiple sources, resolve duplicates, false positives is important. When security incidents happen, the stakeholders who manage the IT infrastructure will want the simplest and most accurate set of information that they can act on.
SIEM solutions offer dashboard interfaces, notifications, alerts and reports that are made available depending on the conditions, rules and events.
Security operations in the organization would action upon these notifications and also rely on the analysis and reporting capabilities of SIEM to learn and make their systems more secure.
In order to stay ahead of threats, risks, and attackers, modern SIEM software moves beyond simple log data to include advanced analytics.
Through artificial intelligence and machine learning, the best SIEM solution should include advanced analytics so your organization can stay ahead of attackers.
Legacy SIEM offerings used to assume that all the enterprise infrastructure was hosted within the company. Today, companies are quickly shifting to cloud, multi-cloud, and hybrid cloud infrastructures. The right SIEM solutions must be able to function across any infrastructure with full flexibility.
With the right data collected across the organization, possible security threats would be flagged and actioned upon before breaches happen. Threat detection, intelligence of false positives all help the company be prepared.
When incidents do happen, the data, event and activity correlation will help provide lessons and learnings which can be fed back into the SIEM solutions for better prevention of future breaches.
The first step to resolve a security incident is to be alerted as soon as possible and then quickly respond. IT departments benefit from an SIEM solution that can detect fraudulent, anomalous behavior quickly from across the organization.
The ability to aggregate and analyze logs and events from all devices, users, applications and servers help surface issues quicker and help the organization focus on their work and not the fear of intruders and breaches. They also serve to keep the company compliant and support forensics investigations.
Most organizations have agreed to varying degrees of regulation and compliance to keep certain information private and protected. Other regulations require tracking of who has access and when. SIEM solutions help organizations have both a real-time and historic view of access to data and stay compliant.
The nature of security incidents is that a lot of damage can be done in a short period of time. The ability for the right people across departments to be alerted and play an active role in isolating, containing, stopping the incident benefits everyone.
When different parts of the business have the same access and visibility to data, there is more cooperation to corporate wide goals of security and compliance.
Security breaches cost companies millions of dollars. Prepared IT organizations put SIEM high in priority because preventing security incidents and reducing downtime allows your organization to focus on revenue generating goals.