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An alert in Sentinel represents a potential security issue that has been identified by the analytics tools within the service. Alerts are generated based on analytics rules that are either pre-defined or custom-made by the security team. These rules can use various data sources, including logs from Azure services, on-premises equipment, and other cloud providers.
Alerts in Microsoft Sentinel have different severity levels:
An incident in Sentinel is an aggregation of related alerts that may constitute a security threat or breach. When multiple alerts correlate to a particular attack pattern or when a single alert is significant enough, an incident is created.
Incidents are categorized on various factors including:
Upon an alert or incident being triggered, a security analyst will perform an investigation. The investigation aims to determine the scope, impact, and the underlying cause of the incident. Microsoft Sentinel provides tools and features like the investigation graph to visualize relationships between alerts, and entities and to track the trajectory of an attack.
The analyst follows these steps:
Workbooks and playbooks in Microsoft Sentinel can automate responses to certain alerts. These can range from simple notifications to complex remediation tasks.
Microsoft Sentinel allows for automation rules to be set, which can:
By following a structured approach to evaluate alerts and incidents within Microsoft Sentinel, organizations can effectively combat cybersecurity threats and reduce their overall risk profile. Implementing playbooks for predictable scenarios can save valuable time during an incident response, while investing in training for security personnel can enhance the effectiveness of investigations.
Microsoft Sentinel is a standalone SIEM system, while Azure Defender (now Azure Defender is integrated into Microsoft Defender for Cloud) is a cloud workload protection platform. They can work together but are not fully integrated into a single service.
Microsoft Sentinel provides connectors for different Microsoft services and solutions, which can be used to automate data collection.
Correct Answer: C) Scheduled Query Rules
Scheduled Query Rules are used in Microsoft Sentinel to create custom detection rules based on specific query criteria.
While analytics rules are the primary method for triggering incidents, you can also manually create incidents from events or other sources.
Correct Answer: D) All of the above
Investigating related alerts, entity behavior, and activity logs is crucial to understand the scope of an attack and respond appropriately.
Playbooks in Microsoft Sentinel are automated response actions that can be configured to respond to incidents automatically.
Correct Answer: B) Live Stream
Live Stream in Microsoft Sentinel allows analysts to preview the match for analytic rule logic in near real-time, simulating and validating detection rules and responses.
Correct Answer: B) Detection
The first step is detecting potential security threats, which is then followed by the triage, investigation, and finally remediation phases.
Microsoft Sentinel provides data connectors that can collect security data from various sources, including third-party solutions and on-premises systems.
Correct Answer: D) Both A and B
The severity of an incident is typically assigned based on the potential impact of the threat and the confidence level in the detection rule that triggered the incident.
Microsoft Sentinel uses Kusto Query Language (KQL), which is a powerful query language for analyzing, exploring, and visualizing data.
Correct Answer: B) Fusion
Fusion in Microsoft Sentinel applies machine learning and statistical modeling to bring together diverse data from different sources to identify potential threats that might otherwise go unnoticed.
The purpose of monitoring data in Microsoft Sentinel is to identify potential security threats in real-time and take action to mitigate those threats.
You can monitor a wide range of data sources in Microsoft Sentinel, including Azure services, Microsoft 365, and third-party security solutions.
To monitor data in Microsoft Sentinel, you can navigate to the “Data connectors” section, select the data source you want to monitor, and use the built-in analytics tools to identify potential security threats.
A case in Microsoft Sentinel is a way to group related alerts and incidents together and track your investigation progress.
To create a case in Microsoft Sentinel, you can navigate to the “Cases” section and click on the “New case” button. You can then assign the case to the appropriate team member and add related alerts and incidents.
The purpose of investigating cases in Microsoft Sentinel is to identify the root cause of potential security threats and take action to mitigate those threats.
Microsoft Sentinel provides built-in analytics and investigation tools, as well as the ability to run playbooks and take manual actions.
An incident in Microsoft Sentinel is a security-related event that has been identified and requires further investigation.
To view incidents in Microsoft Sentinel, you can navigate to the “Incidents” section and view the related alerts and incidents.
You can evaluate the severity of an incident in Microsoft Sentinel based on the available data and context, such as the potential impact on your organization.
The purpose of responding to an incident in Microsoft Sentinel is to take action to mitigate potential security threats and prevent future incidents.
Microsoft Sentinel provides built-in investigation and response tools, as well as the ability to run playbooks and take manual actions.
To update the status of an incident in Microsoft Sentinel, you can navigate to the incident and click on the “Update incident” button. You can then add comments and update the incident status as needed.
Using cases in Microsoft Sentinel can help you group related alerts and incidents together, track your investigation progress, and improve your incident management.
Microsoft Sentinel can help organizations improve their security operations by detecting potential security threats in real-time, investigating cases to identify the root cause of incidents, and responding to incidents to mitigate potential security threats.
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