Enrich IOC Skill
Perform standardized enrichment for a single Indicator of Compromise (IOC) using Google Threat Intelligence (GTI) and Chronicle SIEM.
Inputs
IOC_VALUE- The indicator value (e.g., "198.51.100.10", "evil-domain.com", "abcdef123456...", "http://bad.url/path")IOC_TYPE- The type: "IP Address", "Domain", "File Hash", or "URL"
Workflow
Step 1: GTI Enrichment
Based on IOC_TYPE, call the appropriate GTI tool:
| IOC Type | Tool | Example |
|---|---|---|
| IP Address | gti-mcp.get_ip_address_report | get_ip_address_report(ip_address="198.51.100.10") |
| Domain | gti-mcp.get_domain_report | get_domain_report(domain="evil-domain.com") |
| File Hash | gti-mcp.get_file_report | get_file_report(hash="abcdef123...") |
| URL | gti-mcp.get_url_report | get_url_report(url="http://bad.url/path") |
Store key findings in GTI_FINDINGS:
- Reputation score
- Classification (malicious, suspicious, clean)
- Key relationships (contacted domains, IPs, etc.)
- Associated malware families or campaigns
Error Handling: If GTI fails (quota exceeded, IOC not found), note the limitation and proceed with SIEM enrichment.
Step 2: SIEM Entity Lookup
secops-mcp.lookup_entity(entity_value=IOC_VALUE)
Store in SIEM_ENTITY_SUMMARY:
- First/last seen timestamps
- Related alerts
- Associated assets/users
Step 3: SIEM IOC Match Check
secops-mcp.get_ioc_matches()
Check if IOC_VALUE appears in results. Store Yes/No in SIEM_IOC_MATCH_STATUS.
Required Outputs
After completing this skill, you MUST report these outputs:
| Output | Description |
|---|---|
GTI_FINDINGS | Summary of GTI report (reputation, classification, relationships) |
SIEM_SUMMARY | SIEM entity context (first/last seen, related alerts) |
IOC_MATCH_STATUS | Yes/No - whether IOC appears in recent threat feed matches |
THREAT_SCORE | Numerical threat score (0-100) based on GTI reputation |
MALICIOUS_CONFIDENCE | Confidence level: high, medium, low, or none |
Quick Reference
GTI Tools:
get_ip_address_report(ip_address)get_domain_report(domain)get_file_report(hash)get_url_report(url)
SIEM Tools:
lookup_entity(entity_value)get_ioc_matches()