IBM Security Systems C1000-162 Book

Custom Properties: QRadar allows you to extract custom properties from raw log and flow data, enriching your analysis capabilities.

Supported Expression Types:

Regex (Regular Expressions): Powerful patterns for extracting specific strings or values from textual data.

JSON (JavaScript Object Notation): Extracts values from structured JSON data within events and flows.

Unsupported Types:

XLS: Excel spreadsheet format. QRadar isn't designed to parse spreadsheets directly.

YAML: A data serialization language. QRadar's extraction is more focused on data within events and flows rather than standalone configuration files.

HTML: Markup language used for web pages. Event data is unlikely to be solely in HTML format.

References:

IBM QRadar Documentation - Custom Property Expression Types: 

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​​.

Here's the breakdown of why this approach is the most suitable:

Focused Export: The "Event Export (with AQL)" option allows targeted exporting of events based on specific AQL queries. This ensures you only extract the necessary data.

Usability: The Log Activity tab's interface, including the Test and Export functionality, makes it easy to use even for less technical users familiar with basic QRadar concepts.

CSV Format: CSV offers a readable, widely compatible format for data review outside of QRadar.