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On the Offenses tab within QRadar, the "Offense Type" column explains the cause of the offense. The

offense type is determined by the rule that triggered the offense, and it dictates the kind of

information displayed in the Offense Source Summary pane. This helps analysts understand the

nature and origin of the offense, facilitating more effective investigation and response actions​​.

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The Application Overview dashboard in QRadar includes various default items1.​Two of these items

are​Top Applications (Total Bytes)​and​Outbound Traffic by Country (Total Bytes)1.

Default dashboards - IBM Documentation

According to the IBM Security QRadar SIEM V7.5 documentation, the Application Overview

dashboard by default includes items such as "Inbound Traffic by Country (Total Bytes)," "Outbound

Traffic by Country (Total Bytes)," and "Top Applications (Total Bytes)" among others. This confirms

that options C and D are displayed by default on the Application Overview dashboard​​.

The AQL (Ariel Query Language) statement provided would return all fields from the 'events' table

where the 'username' column contains the string 'ERS', regardless of case. The 'ILIKE' operator in AQL

is used for case-insensitive pattern matching, which means that it will match 'ers', 'Ers', 'ErS', etc​​.

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Offense chaining in IBM Security QRadar SIEM V7.5 is based on the offense index field specified in

the rule. This means that if a rule is configured to use a specific field, such as the source IP address,

as the offense index field, there will only be one offense for that specific source IP address while the

offense is active. This mechanism is crucial for tracking and managing offenses efficiently within the

system​​.

The "Start Time" timestamp represents when an event is received by a QRadar Event Collector,

marking the moment QRadar first becomes aware of the event. This is crucial for understanding the

timing of event processing and potential delays in the event pipeline​​.

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