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When configuring a log source in IBM QRadar SIEM V7.5, the protocols used to receive data into the event ingress component are critical for ensuring proper data collection and analysis. The main protocols that are supported for this purpose are:

Syslog: A widely used protocol for message logging, supported by many network devices and servers.

HTTP Receiver: Allows QRadar to receive logs via HTTP POST requests, enabling integration with various web services and applications.

SNMP (Simple Network Management Protocol): Used for collecting and organizing information about managed devices on IP networks and for modifying that information to change device behavior.

ReferencesIBM QRadar SIEM documentation and product guides confirm that these are the supported protocols for receiving data into the event ingress component. The specific details on protocol support can be found in the QRadar SIEM administration and configuration manuals.

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.

TACACS (Terminal Access Controller Access-Control System) authentication is a protocol used in IBM QRadar SIEM V7.5 for authenticating users by forwarding their credentials to an external server. Here’s how it works:

Encryption: TACACS encrypts the entire payload of the authentication packet, including the username and password, ensuring secure transmission.

Forwarding Credentials: After encryption, the credentials are forwarded to an external TACACS server, which performs the actual authentication.

Authentication Process: The external server checks the credentials against its database and sends a response back to QRadar indicating whether the authentication is successful or not.

ReferencesIBM QRadar SIEM documentation explains TACACS authentication in detail, highlighting its secure encryption and external server verification process.

To see all of the events from a particular log source in the Log Activity tab, a user must have the appropriate permissions set in their security profile. The most restrictive permissions needed are:

Security Profile Inclusion: The log source must be included in the user's security profile. This means the user must have explicit permission to access events from this log source.

Permissions to Networks and Log Sources: The user's security profile must also include permissions to both Networks and Log Sources. This ensures the user has the necessary access to view events related to the specified log source within the network context.

These permissions are crucial to control and restrict access, ensuring users can only view data they are authorized to see while maintaining security and privacy within the system.

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

Similar to the previous question, when a QRadar administrator creates a new saved search and wants it to be the first search displayed upon opening the Log Activity tab, the correct option to enable is "Set as Default." Here's the detailed process:

Saved Search Creation: The administrator specifies the search parameters and criteria to create a new saved search.

Enabling Default Setting: By selecting the "Set as Default" checkbox, the administrator ensures that this search will automatically run and display when the Log Activity tab is accessed.

Utility: This option is particularly useful for quickly accessing the most relevant data without needing to manually select and run the saved search each time.

Setting a default search helps maintain focus on critical security events by providing immediate access to predefined search results.

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

To configure a log source in IBM QRadar SIEM V7.5 to provide events to different domains, administrators can use custom properties. Here’s how it works:

Custom Properties: Create and configure custom properties to tag events with specific domain information.

Assigning Events: When events are ingested from a log source, these custom properties can be used to dynamically assign events to different domains based on predefined criteria.

Domain Management: This approach allows flexibility in managing and segregating data from a single log source across multiple domains, ensuring that each domain receives the relevant events.

ReferencesThe configuration of custom properties for domain assignment is detailed in the QRadar SIEM administration guides, providing step-by-step instructions for setting up and using custom properties for domain management.

In IBM QRadar, the magnitude score of an offense is influenced by several parameters, one of which is credibility. Here’s a detailed explanation:

Magnitude Score: The magnitude score represents the severity and importance of an offense in QRadar. It is a composite score that helps prioritize incidents for investigation.

Credibility Parameter: Credibility assesses the reliability of the event source and the likelihood that the event represents a real threat. Higher credibility indicates that the source is reliable and the threat is more likely to be legitimate.

Contribution to Magnitude: The credibility parameter directly influences the magnitude score by weighting the offense higher if the credibility of the event ishigh. This ensures that more reliable and potentially more severe incidents are prioritized.

Credibility is one of the key factors used by QRadar to assess and prioritize security incidents, ensuring effective incident management.

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

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.

In IBM QRadar SIEM V7.5, the accumulator process must complete data aggregation within a specific timeframe to be deemed successful:

Timeframe: 60 seconds

Aggregation Process: The accumulator aggregates events and flows for reporting and analysis. If it cannot complete this task within 60 seconds, it is considered unsuccessful.

Impact: Failure to aggregate within the specified timeframe can result in missing data points in reports and dashboards, affecting the accuracy and completeness of the information presented.

ReferencesThe QRadar SIEM administration guides detail the accumulator process and the importance of completing data aggregation within 60 seconds to ensure accurate reporting.

When using the DSM (Device Support Module) Editor in IBM QRadar to map an event to an OID (Object Identifier), the Event ID field is mandatory. The Event ID uniquely identifies the event within QRadar and is essential for ensuring that the correct event data is associated with the appropriate OID. This mapping process allows QRadar to properly categorize and handle events based on their unique identifiers.

ReferencesQRadar SIEM V7.5 Administration Guide - Chapter on DSM Editor and Event Mapping