Microsoft Security Operations Analyst Associate SC-200 Practice Question
You are creating a Kusto Query Language (KQL) analytics rule in Microsoft Sentinel. The objective is to detect interactive sign-in failures across all connected data sources without having to write source-specific queries.
Which ASIM parser or function should you start the query with to achieve this goal?
ASIM (Advanced Security Information Model) parsers provide normalized views of related event types collected from multiple data sources. To query authentication (sign-in) activity such as logon successes or failures, you start your KQL with the imAuthentication parser, for example:
imAuthentication
| where EventType == "Logon"
| where LogonSucceeded == false
The parser returns authentication-related events already mapped to a common schema, eliminating the need to reference source-specific tables like SecurityEvent (Windows security logs) or AzureDiagnostics (Azure platform logs). Heartbeat contains agent health information and is unrelated to sign-in events. Therefore, imAuthentication is the correct starting point for detecting interactive sign-in failures with ASIM.
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What is an ASIM parser and why is it important in KQL queries?
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How does the `imAuthentication` parser work in sign-in activity detection?
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What are the limitations of other starting points like `SecurityEvent` or `AzureDiagnostics` for this query?
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Microsoft Security Operations Analyst Associate SC-200
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