Atomic Runbook: Get Domain Threat Intel via SecOps MCP

ID: RB-ATOM-DOMAIN-002 Version: 1.0 Last_Updated: 2025-05-30 Purpose: To retrieve general threat intelligence about a domain/FQDN using the Chronicle secops-mcp get_threat_intel tool. This is often used for broader context or as an alternative if specialized tools are inconclusive. Parent_Runbook(s)/Protocol(s): rules-bank/indicator_handling_protocols.md#2-atomic-indicator-domain-name--fqdn, rb_domain_get_gti_report.md (as potential next step) Trigger: When a domain/FQDN requires external threat intelligence, potentially after an initial GTI check, or if narrative context is desired.

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Inputs Required

• domain_name: string - The domain name or FQDN to query.
  • Source Example: Alert field, output from other enrichment runbooks.
• gti_confidence (optional): string - Confidence level from a preceding GTI check (e.g., "Low_Risk_GTI"). Used for context.

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Execution Steps

1. Tool Selection:
   • Primary_Tool_MCP_Server: secops-mcp
   • Primary_Tool_Name: get_threat_intel
2. Parameter Mapping:
   • Construct a query string for the MCP Tool.
     • query: "Provide threat intelligence summary for domain {domain_name}"
3. Execute Tool: Call the get_threat_intel tool with the constructed query.
   • AI Agent Note: Refer to rules-bank/mcp_tool_best_practices.md for guidance on get_threat_intel.
4. Data Transformation/Extraction:
   • Output is a textual summary. AI may need to parse for keywords indicating risk.

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Outputs Expected

• secops_ti_summary: string - The textual threat intelligence summary.
• identified_keywords: list (optional) - Keywords extracted by AI (e.g., "malware distribution", "phishing site", "benign").
• output_status: string - ["Success", "Failure"]
• output_message: string (if Failure) - Details of the issue.

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Decision Logic / Next Steps (If Applicable)

• IF output_status is "Success":
  • IF secops_ti_summary contains keywords like "known malicious", "phishing campaign", "malware C2" THEN
    • Flag Domain as "High_Risk_SecOpsTI".
    • Consider proceeding to containment or escalation.
  • ELSE IF secops_ti_summary contains keywords like "suspicious", "mixed reputation" OR (gti_confidence was "Medium_Risk_GTI_Needs_Correlation" AND summary is not explicitly benign) THEN
    • Flag Domain as "Medium_Risk_SecOpsTI_Needs_Correlation".
    • Proceed to rb_domain_lookup_entity_chronicle.md.
  • ELSE
    • Flag Domain as "Low_Risk_SecOpsTI" (or "Info_Only_SecOpsTI").
    • Proceed to rb_domain_lookup_entity_chronicle.md.
• ELSE (output_status is "Failure"):
  • Log error: output_message.
  • Escalate to human analyst: "Failed to retrieve SecOps threat intelligence for domain {domain_name}."

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AI Agent Execution Notes

• AI should perform NLP on secops_ti_summary to extract identified_keywords for automated decision branching.
• Context from previous checks (like gti_confidence) should inform interpretation of this tool's output.

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Metrics Collection Points

• Log execution time.
• Log output_status.
• (Reference rules-bank/ai_performance_logging_requirements.md)

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References

• rules-bank/mcp_tool_best_practices.md
• rules-bank/indicator_handling_protocols.md
• rules-bank/ai_performance_logging_requirements.md