detection-engineering-coverage-evaluation

SecOps Detection Coverage Skill

This skill guides the agent through an end-to-end detection engineering lifecycle using Google SecOps MCP tools. It handles multiple Threat Detection Opportunities (TDOs) and ensures exhaustive coverage evaluation for all generated synthetic events.

Workflow Execution Checklist

Copy this checklist and track progress for each iteration:

• Step 1: Extract raw text content from a source (for example, blog URL).
• Step 2: Generate Threat Detection Opportunities (TDOs).
• Step 3: Loop through ALL TDOs to generate synthetic events.
• Step 4: Loop through ALL UDM events to evaluate rule coverage.
• Step 5: For identified rules, check enablement and alerting status.
• Step 6: Generate new rules for identified gaps.
• Step 7: Provide a structured summary of findings and gaps.
• Step 8: Ask the user to approve adding newly generated rules to their SecOps environment and create them.

Detailed Steps

1. Extract Threat Intelligence

• Use the following prompt to extract all text content from a URL: - "Fetch the blog text from {url}. You need to extract and output the entire text content of the page, exactly as it appears in the HTML, without any summarization, modification, or omission."

• Summary of Step: Report only that the text was successfully extracted from the provided URL. Do not output the full raw text.

• Next Step: The extracted text will be used to generate Threat Detection Opportunities (TDOs).

2. Generate TDOs

• Call generate_threat_detection_opportunity with the extracted full blog threat raw text. You must not summarize. This tool returns one or more TDOs.

• Summary of Step: Report the number of TDOs generated and provide a brief, high-level summary for each TDO (for example, the key threat or attacker technique identified). Do not output the full TDO JSON.

• Next Step: The process will now loop through each generated TDO to create synthetic events.