What is Security Information and Event Management (SIEM)?

Security Information and Event Management (SIEM) is security software that collects log security data from a variety of sources in near-real-time, classifying and evaluating security alerts. SIEM combines security information management, which stores, analyses, and reports log data over time, with security event management, with realtime system monitoring, correlates events, and generates alerts.

The platform extracts actionable data from events and log entries using correlation rules and statistical algorithms. The following are some of the key aspects of a SIEM security solution −

  • Visual consoles − are used as dashboards to offer an overview picture of the security system in near-real-time.

  • Data Consolidation − Manages data streaming log events from many sources.

  • Correlation of Events − Adds context and intelligence to raw data using Boolean logic principles.

  • Automated Security Event Notifications − Analyzes signs of compromise and sends out alerts in real-time, reporting problems.

What Does SIEM Do?

SIEM may be an important aspect of any security solution, whether you have ten or 1,000 employees that rely on your online systems. It essentially functions as a security system, ensuring that your company is protected from cyber-attacks. After assessing a range of criteria, the SIEM will alert you if there appears to be a threat in your system.

In a nutshell, SIEM collects and analyses data on internet activity and behavior in your company system. You may believe that your IT department can notice a problem from a mile away, but with hundreds upon thousands of events taking place in your IT system every day, it's difficult for a person to keep track of them all.

SIEM software is intended to accomplish exactly that. Because it can detect odd activity, a SIEM can notify your team in time to halt a cyber assault before it has longterm consequences. This is why it's critical to choose the correct SIEM solutions and managed SIEM services for your company. A SIEM serves as the central center for all of your system's logs. It will save all of the information and events that occur in your environment, as well as allow you to see all of the previous logs to compare to your current use and context. In a nutshell, it serves as your digital business's primary alarm system.

How Does SIEM Work?

SIEM software gathers log and event data from an organization's applications, security devices, and host systems and consolidates it into a single centralized platform. SIEM collects data from antivirus events, firewall logs, and other sources, categorizing it as malware activity, failed and successful logins, and so on.

SIEM creates an alert and assigns a threat level based on established rules when it detects a danger with the help of network security monitoring. For instance, attempting to log into an account ten times in 10 minutes is OK, while any attempt to log into an account 100 times in 10 minutes may be considered as an attempted assault. It identifies risks and generates security warnings in this manner. SIEM's configurable dashboards and event management system let investigators get more done in less time.

It will, for example, keep track of unsuccessful login attempts and any threats that appear to be malware. It collects all of these logs in one place and generates a standard fingerprint that indicates the activities of your system. After that, this fingerprint is compared to the optimal patterns of activity for your company.

Importance of SIEM

The quantity of data generated by the ordinary firm nowadays is too big to process manually, which is why an organization requires a SIEM solution to monitor the systems and detect suspicious actions.

SIEM operations revolve around log management; the more diverse types of logs from more distant sources feed the SIEM system, the more actionable reports it creates. By cross-referencing logs from various sources against correlation criteria, SIEM can correlate pertinent events.


Because you can identify any possible risks in your system, you can stop them before they cause any serious damage. You have no clue what's going on behind all of the standard IT checks if you don't have access to the behavior of folks who utilize your systems.

Detecting Unusual Incidences

SIEM identifies incidents that might otherwise go missed. This technique examines log entries in order to spot signs of malicious activity. Furthermore, because it collects events from all sources throughout the network, the system can reconstruct the attack chronology to aid in determining the type and impact of the assault. The platform sends security control suggestions, such as instructing a firewall to prevent harmful information.


You may run specific tests to see the areas that you're interested in if you want to look at anything in particular. There are many various types of SIEM products and services available, so you should be able to find something that suits your needs. Some tests are better suited to larger organizations, while others are better suited to smaller firms, and they also come with a variety of price tags.

Observance of Regulations

Companies utilizes SIEM to satisfy compliance requirements by creating reports that cover all of these sources' documented security incidents. An organization without a SIEM must manually retrieve log data and generate reports. It may be more costeffective: if you have a SIEM solution that does the job for you and a managed service to calibrate and monitor it, you may not need to recruit as many in-house IT staff to focus on the security position.

While SIEM-as-a-service is an investment, you may discover that it is a more costeffective solution for your company if you compare the costs.

Use Cases for SIEM

In today's security landscape, SIEM has a variety of applications, including internal as well as external threat detection and prevention, along with compliance with various regulatory criteria.

SIEM is Necessary for Compliance

Businesses are being pushed to invest more extensively in IT security as a result of tighter compliance laws, and SIEM plays an essential role in helping firms comply with various standards. Such compliance regulations are becoming more and more common, putting additional pressure on organizations to detect and disclose breaches.

While SIEM was previously utilized mostly by large corporations, because of the increased emphasis on compliance and keeping firms safe, it may be essential for small and medium-sized businesses because legislation such as GDPR applies to all businesses, regardless of size.

Security on the Internet of Things

The market for the IoT is expanding. According to Gartner, by 2020, there will be 26 billion linked devices. However, advancement comes with risk, as more connected devices provide more ports of entry for hackers to target organizations. Once a hacker gains access to one area of your network via a connected device, they may easily access the rest of it. As a result, SIEM software is an important aspect of your company's cyber security since it helps mitigate IoT risks like DoS attacks and identify at-risk or hacked devices in your environment.

Insider Threats Should Be Avoided

Insider threats represent a significant concern, especially given the ease of access, and they aren't the only element that makes businesses vulnerable. SIEM software enables businesses to track employee behaviors in real-time and generate warnings for unusual occurrences based on 'normal' behavior. Businesses may also use SIEM to undertake granular monitoring of privileged accounts and generate warnings for activities that a certain user is not permitted to perform, such as installing software or deactivating security software.

Keeps Your Critical Business Systems Safe

Let's face it, one of the most crucial advantages of SIEM is that it protects your company from hostile criminal hackers. You know how important it is for your technology to work properly in order for your business to run smoothly. If difficulties emerge and you don't address them, you'll be recuperating for many weeks, which may be extremely destructive to your business's operations.