Security information and event management (SIEM) are a single security management system that offers full visibility into activity within your network — which empowers you to respond to threats in real time. It collects, parses and categorizes machine data from a wide range of sources, then analyzes the data to provide insights so you can act accordingly.
A SIEM solution ingests and combs through a high volume of data in mere seconds to find and alert on unusual behavior, offering real-time insight to protect your business — a task that would otherwise be impossible to execute manually. At any moment, SIEM (pronounced “SIM”) provides you with a snapshot of your IT infrastructure, while allowing you to store and manage log data to ensure compliance with industry regulations. This ability to analyze data from all network applications and hardware in real time can help organizations stay ahead of internal and external threats.
SIEM has been around for more than a decade and has evolved considerably since Gartner coined the term in 2005. It may not have the buzz of AI technologies, but it’s still critical for threat detection in an increasingly complex and fast-moving IT and security landscape.
Attacks come quickly, and the longer you wait to address them, the more damage they do. Your SIEM should offer you a real-time, bird’s-eye view of what’s happening within your network, including activity associated with users, devices and applications, as well as any activity not specifically attached to an identity. You need monitoring capabilities that can be applied to any on-premises, cloud or hybrid data set.
Beyond the monitoring aspect, you need the ability to synthesize the information into a format that’s usable. Choose a SIEM with a library of customizable, predefined correlation rules, a security event console to provide a real-time presentation of security incidents and events, and dashboards to provide live visualizations of threat activity.
Most importantly, an analytics-driven SIEM needs to include auto-response capabilities that can disrupt cyber attacks in progress. It should also offer you the ability to identify notable events and their status, indicate the severity of events, start a remediation process, and provide an audit of the entire process surrounding that incident.
Some threats could be internal, either because users represent an actual threat or because their behaviors open the organization to outside threats. At the most basic level, your SIEM tool should offer you the ability to analyze access and authentication data, establish user context, and provide alerts relating to suspicious behavior and violations of corporate and regulatory policies. If you are responsible for compliance reporting, you may also need to monitor privileged users — users who are especially likely to be targeted by an attack — a common requirement for compliance reporting in most regulated industries.
Your SIEM should help you identify key external threats, such as known zero-day exploits and advanced persistent threats. Threat intelligence offers you the ability not only to recognize abnormal activity, but to identify weaknesses in your security posture before they’re exploited, and plan responses and remediations
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