Free IBM C1000-156 Practice Exam with Questions & Answers

To ensure that a rule in IBM QRadar SIEM V7.5 does not send an email more than 10 times in a 24-hour period, the "response limiter" can be used. Here’s how it works:

Response Limiter: This feature limits the number of times a rule action (such as sending an email) can be executed within a specified timeframe.

Configuration: Set the response limiter to a maximum of 10 actions in 24 hours.

Implementation: Apply the response limiter to the rule, ensuring that even if the rule conditions are met multiple times, the email will only be sent up to the specified limit.

ReferencesIBM QRadar SIEM documentation on rule management and tuning includes detailed instructions on using the response limiter to control the frequency of rule actions.

Therecon connectcommand in IBM QRadar SIEM V7.5 allows administrators to run a specific command inside a specific container, given an app ID or a combination of workload, service, and container. Here’s how it works:

Command:recon connect

Function: This command connects to a specified container and allows the execution of commands within that container.

Usage: Administrators use this command to manage and troubleshoot applications running in isolated environments (containers) within QRadar.

ReferencesThe QRadar administration and support guides detail the usage of therecon connectcommand for managing containerized applications.

In QRadar, when evaluating domain criteria based on an event, the precedence order for domain assignment if the event does not match the domain definition for custom properties is as follows:

Log Source: The first criterion checked is the log source. Each event is associated with a log source, and the domain is determined based on this source.

Log Source Group: If the log source does not provide a domain match, the next criterion is the log source group. Log sources can be grouped together, and domain definitions can be applied at the group level.

Event Collector or Data Gateway: If neither the log source nor the log source group provides a match, QRadar checks the event collector or data gateway for a domain definition.

DDS (Data Domain Service): As the final step, if no other criteria match, the DDS is used to assign the default domain.

This order of precedence ensures that the most specific criteria are checked first before falling back to more general criteria, ensuring accurate domain assignment for events.

ReferencesIBM Security QRadar SIEM and IBM Security QRadar EDR integration.pdf​

Administrators can configure a rule response in QRadar to add event data to a reference set by using the "add to reference set" rule response. This is a predefined responseaction in QRadar that allows specific event data to be added to a reference set when the rule conditions are met.

Navigate to the "Offenses" tab in the QRadar console.

Select "Rules" from the navigation pane.

Create a new rule or edit an existing rule.

In the "Rule Response" section, add a new response.

Select the "Add to Reference Set" response.

Specify the reference set and the data to be added.

Save and deploy the rule.

ReferencesIBM QRadar SIEM V7.5 Administration documentation

When exporting a list of events to a CSV file in IBM QRadar SIEM V7.5, the default columns included in the search result typically are:

Log Source: The origin of the log data.

Event Count: The number of events.

High Level Category: The broad classification of the event.

Related Offense: The associated offense ID or description.

These columns provide a comprehensive overview of the events, helping analysts quickly understand the context and significance of the data.

ReferencesIBM QRadar SIEM documentation provides details on the default columns included in search results and their significance in event analysis.

When adjusting a custom email template in IBM QRadar SIEM V7.5, the two elements that need to be edited to include customizations are:

<subject>: This element defines the subject line of the email, which can be customized to provide a clear and relevant description of the email's content.

<body>: This element contains the main content of the email. Customizing the body allows administrators to include specific information, formatting, and messages relevant to the recipient.

Customizing these elements ensures that the email notifications are informative and tailored to the needs of the recipients.

ReferencesThe QRadar SIEM user and configuration guides provide instructions on customizing email templates, highlighting the<subject>and<body>elements as key areas for customization.

Forward: Data is forwarded to a specified destination. It is also stored in the database and processed by the Custom Rules Engine (CRE).

Drop: Data is dropped, meaning it is not stored in the database and is not processed by the CRE. If you select the “Drop” option, any events that match this rule are credited back 100% to the license.

Bypass Correlation: Data bypasses the CRE but is stored in the database. This option allows events to be used in analytic apps and for historical correlation runs. It’s useful when you want specific events to skip real-time rules.

Log Only (Exclude Analytics): Events are stored in the database and flagged as “Log Only.” They bypass the CRE and are not available for historical correlation. These events contribute to neither offenses nor real-time analytics.

Now, let’s look at the valid combinations:

Forward and Drop: Data is forwarded to a specified destination, but it is not stored in the database or processed by the CRE. Dropped events are credited back to the license.

Forward and Bypass Correlation: Data is forwarded to a destination and stored in the database, but CRE rules do not run on it. Useful for scenarios where you want events to bypass real-time rules but still be available for historical correlation.

Forward and Log Only (Exclude Analytics): Events are forwarded to a destination, stored as “Log Only,” and bypass the CRE. They are not available for historical correlation and are credited back to the license.

Before configuring a WinCollect log source in QRadar, the administrator must ensure that specific network ports are open to facilitate communication. The required ports are:

Port 514: This is the default port for syslog, a standard protocol used to send system log or event messages to a specific server. WinCollect uses this port to send logs from Windows machines to the QRadar server.

Port 8413: This port is used for communication between the WinCollect agent and the QRadar Console. It is necessary for managing the WinCollect agent and ensuring proper data transmission.

Ensuring these ports are open is crucial for the seamless operation and integration of WinCollect with QRadar, allowing the secure and efficient collection of log data from Windows environments.

ReferencesIBM Security QRadar SIEM and IBM Security QRadar EDR integration.pdf​

The Advanced Search field in IBM QRadar is used for running Ariel Query Language (AQL) searches. Here's a detailed explanation:

Ariel Query Language (AQL): AQL is a query language used in QRadar to search and retrieve event and flow data from the Ariel database. It is similar to SQL but tailored for the specific needs of QRadar's data structure.

Advanced Search Field: The advanced search field provides a user interface for crafting and executing AQL queries. This allows users to perform detailed and complex searches to analyze specific patterns, behaviors, or events in their security data.

Functionality: Using AQL, users can specify criteria for selecting and filtering data, allowing for precise and comprehensive searches. This is essential for deep-dive investigations and custom reports.

The ability to run AQL searches gives analysts powerful tools to extract meaningful insights from their security data.

ReferencesIBM Security QRadar SIEM and IBM Security QRadar EDR integration.pdf​

Tuning a building block in IBM QRadar SIEM V7.5 is primarily aimed at reducing the number of false positives. This process involves adjusting the rules and logic within the building block to better differentiate between normal and suspicious activity. Here’s the detailed explanation:

False Positives: High numbers of false positives can overwhelm analysts and obscure genuine threats. Tuning helps in refining detection criteria to reduce these false alarms.

Rule Adjustments: Modifying the thresholds, conditions, and filters within the building block rules to ensure they more accurately reflect the environment’s typical behavior.

Improved Accuracy: Enhanced precision in detecting true security incidents, thus improving the overall effectiveness of the SIEM solution.

ReferencesIBM QRadar SIEM administration guides and best practice documents emphasize the importance of tuning to minimize false positives, ensuring more actionable alerts.