deep-dive-ioc

Deep Dive IOC Analysis Skill

Perform exhaustive analysis of a single, potentially critical Indicator of Compromise escalated from Tier 1 or identified during an investigation.

Inputs

• IOC_VALUE - The IOC to analyze (IP, domain, hash, or URL)
• IOC_TYPE - The type: "IP Address", "Domain", "File Hash", or "URL"
• CASE_ID - case ID for documentation (optional)
• TIME_FRAME_HOURS - Lookback period (default: 168 = 7 days)

Workflow

Step 1: Get Case Context (if CASE_ID provided)

secops-soar.get_case_full_details(case_id=CASE_ID)

Step 2: Detailed GTI Report

Get comprehensive threat intelligence:

| IOC Type | Tool | |----------|------| | IP | gti-mcp.get_ip_address_report(ip_address=IOC_VALUE) | | Domain | gti-mcp.get_domain_report(domain=IOC_VALUE) | | Hash | gti-mcp.get_file_report(hash=IOC_VALUE) | | URL | gti-mcp.get_url_report(url=IOC_VALUE) |

Record:

• Reputation and classifications
• First/last seen dates
• Associated threats (malware families, actors) → ASSOCIATED_THREAT_IDS
• Key behaviors (for file hashes)

Step 3: GTI Pivoting

Use /pivot-on-ioc or directly call GTI relationship tools:

Recommended relationships by type:

• IP: communicating_files, downloaded_files, resolutions
• Domain: resolutions, communicating_files, subdomains
• Hash: contacted_domains, contacted_ips, dropped_files
• URL: communicating_files, downloaded_files

For file hashes, also get behavior summary:

gti-mcp.get_file_behavior_summary(hash=IOC_VALUE)

Step 4: Deep SIEM Search

Search for activity involving the IOC and its related entities:

secops-mcp.search_security_events(
    text="UDM query for IOC_VALUE",
    hours_back=TIME_FRAME_HOURS
)

Identify OBSERVED_RELATED_IOCS - IOCs from GTI pivoting that actually appear in SIEM results.

Step 5: SIEM Enrichment & Correlation

For the IOC and each OBSERVED_RELATED_IOC:

• Use /enrich-ioc for enrichment
• Use /correlate-ioc for alert/case correlation
• Use /find-relevant-case for broader case search

Step 6: Enrich Associated Threats (Optional)

If ASSOCIATED_THREAT_IDS were found (malware families, actors):

gti-mcp.get_collection_report(id=THREAT_ID)

Step 7: Synthesize & Report

Combine all findings:

• GTI report details
• Related entities from pivoting
• SIEM search results
• Observed related IOCs with enrichment
• Related alerts and cases
• Associated threat context

Document in Case (if CASE_ID provided):

Use /document-in-case with comprehensive findings summary

Or generate standalone report:

Use /generate-report with REPORT_TYPE="deep_dive_ioc"

Required Outputs

After completing this skill, you MUST report these outputs:

| Output | Description | |--------|-------------| | GTI_DEEP_FINDINGS | Comprehensive GTI analysis (reputation, classification, behaviors) | | SIEM_DEEP_CONTEXT | Extended SIEM event context (hosts, users, timelines) | | RELATED_ENTITIES | Related IOCs from GTI pivoting (infrastructure connections) | | DISCOVERED_IOCS | All IOCs discovered during analysis | | THREAT_ATTRIBUTION | Threat actor/campaign attribution if found |

Additionally provide:

• Impact assessment and scope identification
• Recommendations (escalate, contain, monitor)
• Documentation in case or standalone report

When to Use This vs Basic Enrichment

| Use /enrich-ioc | Use /deep-dive-ioc | |-------------------|----------------------| | Initial triage | Escalated from Tier 1 | | Quick context needed | Comprehensive investigation | | Single IOC lookup | Full infrastructure mapping | | Tier 1 workflow | Tier 2+ investigation |