Posted on : 15 Mar, 2022, 09:48:33 AM

What is SIEM and How Does it Work

What is SIEM and How Does it Work


SIEM or Security Information and Event Management is advanced software that focuses on enhancing the security understanding and awareness of an IT environment by incorporating security event management (SEM) and security information management (SIM). SIEM solutions strengthen threat compliance, detection, and security incident management by gathering and analyzing real-time and historical security event sources and data.

SIEM technology aggregates security alerts, log data, and events into a centralized platform for providing real-time analysis to monitor security. Security operation centers (SOCs) invest in SIEM software to streamline visibility across the environments of an organization, investigate log data for incident response to data breaches and cyberattacks, and adhere to federal and local compliance mandates.

How Does SIEM Work?

The core function of SIEM is to manage and detect threats. A SIEM supports the incident response abilities of a SOC or Security Operations Center, including threat investigation, detection, threat hunting, and remediation and response activities. A SIEM gathers and combines data from event sources across an organization’s security and IT framework, including networks, firewalls, antivirus security, and host systems devices. It completes the analysis of the data collected across network, endpoint, and cloud assets against advanced analytics and security rules for identifying potential security issues within a firm.

When an event or incident is identified, categorized, and analyzed, SIEM works on delivering notifications and reports to the appropriate stakeholders within the organization. Additionally, a SIEM enables regulatory compliance requirements by delivering auditors a view into their organization's status compliance through reporting capabilities and continuous monitoring.

The Evolution of SIEM Software

SIEM has been around for over 15 years, but modern SIEMs have evolved from their original counterparts. Amrit T. Williams and Mark Nicolett established the “SIEM” in Gartner's research report in the year 2005, Improve IT Security With Vulnerability Management. These legacy SIEMs were integrated security methods combined into one management solution, which include:


• Log management systems (LMS): Centralized logs storage and processes for simple collection.

• Security information management (SIM): Tools for automated collection of log files for long-term analysis, storage, and reporting on log data.

• Security event management (SEM): Technology for real-time correlating and monitoring of events and systems with notification and console views.

Benefits of SIEM Technology

Depending on the vendor and solution, SIEM components can equip a wide assortment of benefits that focuses on increasing the overall security posture with

• Fewer false positive alerts
• Real-time visibly across the environment
• Central management solution for log data and disparate systems
• Reduced mean time to response (MTTR) and mean time to detect (MTTD)
• Grouping and normalization of data to enable reliable and accurate analysis
• Ease of searching and accessing across parsed and raw data
• Ability to map operations with existing frameworks such as MITRE ATT&CK
• Ensure compliance adherence with real-time prebuilt and visibility compliance modules
• Effective reporting and customized dashboards

Next-Gen SIEM vs. SIEM

What are the significant differences between traditional next-gen SIEMs and SIEM solutions? Both solutions have similar functionality at the core, but legacy SIEMs can’t control the rising complexity and volume of data in today’s landscape of threat. With the growth in mobile technologies, cloud adoption, remote workforces, and hybrid data centers, next-gen SIEMs are much more suited for meeting the growing need for threat response and detection across disparate systems.

Next-gen SIEM solutions provide new capabilities for enhancing threat detection and security visibility while streamlining the procedure for security teams to handle their workload. Numerous core components of a next-gen SIEM solution cover:

• Scalable and open architecture: Ability to streamline data from disparate systems across cloud, on-prem, and mobile technology in a single entity.

• Real-time visualization tools: Features that allow security teams to visualize related safety events to illustrate threat incidents accurately.

• Big data architecture: Ability to manage and collect large, complex data sets for indexing and unstructured and structured search.


• Security, orchestration, and automation response: Technology that automates manual, routine analyst actions to improve operations throughout the incident response workflow efficiently.

• User and entity behavior analytics: The solution is to observe and monitor behavioral changes in user data to detect anomalous instances when deviations from “normal” patterns.

How to Get the Most of a SIEM

From large global IT departments to small SOC teams, organizations employ SIEM solutions to facilitate their threat detection and response to risk to the business measurably. However, considerable SIEM technologies are require experienced and resource-intensive staff to manage and implement or augment services for training and support.

Before investing in SIEM, evaluate the security objectives and priorities and gather the business requirements. It can be an investment up front, but SIEM software allows security teams to achieve mitigate and compliance risks quickly, saving the business from financial implications and legality issues if a breach were to occur. When selecting a SIEM solution, be sure to comprehend how licensing models can determine the true total cost of ownership (TCO) and consider future growth as the organization may develop over the years.

It’s critical to locate a trusted provider that aligns with the requirements of the business for long-term scalability while also enabling the team to deploy a quick solution for getting the highest investment return. Here is a practical and most useful guide to help the budget for a SIEM and manage financial risk.

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