Security Information and Event Management (SIEM) is a cybersecurity solution that can identify, analyze and mitigate security threats by collecting and correlating real-time and historical data from multiple sources within an infrastructure. The data typically includes the logs and events generated by firewalls, Intrusion Detection Systems (IDSs) and network devices.
SIEM combines the capabilities of two solutions: Security Information Management (SIM), which is used for collection and storage of security events, and Security Event Management (SEM), which is used to analyze security events to identify anomalous or suspicious behavior. By doing so, SIEM enables organizations to detect and respond to threats more effectively.
Traditional SIEM solutions were limited in their ability to detect threats. They could only perform static analysis of security data based on pre-defined metrics and triggers.
However, modern SIEM solutions have incorporated artificial intelligence (AI) to also analyze user behavior for anomalies that may indicate potential threats. This is a significant improvement over traditional solutions, as it allows them to detect advanced, dynamic attacks that are not easily identified by static analysis of logs or events.
For example, an AI-powered SIEM solution can identify a user who suddenly accesses several sensitive files, or someone who tries to move customer data out of a safety zone. They may also respond to the threat by alerting an administrator, or by taking an automated action, like blocking the user's access.
The key features of a typical SIEM solution are:
A SIEM solution can establish the connection between the three example events by detecting that they involved the same user and occurred in the same time span. It may then be able to conclude that the user is trying to attack the web application.
The specific response capabilities vary depending on the SIEM solution. However, some common examples are:
Here’s what a typical SIEM workflow looks like:
SIEM and Cloud Security Posture Management (CSPM) are both important security tools, but they serve different purposes.
SIEM focuses on aggregation and analysis of security events to detect and mitigate threats and breaches in any IT infrastructure.
On the other hand, CPSM focuses on scanning cloud infrastructures for any security gaps, misconfigurations or vulnerabilities.
The following table outlines the key differences between the two technologies:
Cyber threats have become more diverse, potent and elusive than ever before. From advanced malware and zero-day vulnerabilities to targeted ransomware attacks, malicious actors are constantly developing new strategies to bypass traditional security measures.
To navigate this ever-evolving cybersecurity landscape, organizations need solutions like SIEM that offer protection against even the most advanced cyberattacks. By analyzing historical and real-time logs, SIEM tools continuously expand their knowledge and detection capabilities, staying one step ahead of cybercriminals.
SIEM and Cloud Infrastructure Entitlement Management (CIEM) are both security solutions that collect and analyze data. However, they differ in their scope, offerings and use cases.
SIEM collects and analyzes security data from various sources to detect threats and prevent breaches.
In contrast, CIEM is a cloud-focused solution used for managing cloud entitlements. It scans cloud environments for misconfigurations and vulnerabilities and provides insights into how cloud resources are being used.
The following table outlines the key differences between SIEM and CIEM:
Here are some key benefits of using SIEM to protect your infrastructure: