correlate-ioc

name	correlate-ioc
description	Check for existing SIEM alerts and case management entries related to IOCs. Use to understand if an indicator has triggered previous alerts or is part of ongoing investigations. Takes IOC list and returns related alerts and cases.
required_roles	{"chronicle":"roles/chronicle.viewer","soar":"roles/chronicle.editor"}
personas	["tier1-analyst","tier2-analyst","tier3-analyst"]

Correlate IOC Skill

Check for existing SIEM alerts and cases related to specific Indicators of Compromise.

Inputs

• IOC_LIST - Single IOC or list of IOCs (e.g., ["198.51.100.10", "evil-domain.com"])
• (Optional) TIME_FRAME_HOURS - Lookback period for SIEM alerts (default: 168 = 7 days)
• (Optional) SOAR_CASE_FILTER - Additional filter for SOAR cases (e.g., status="OPEN")

Workflow

Step 1: Correlate SIEM Alerts

Search for alerts containing any IOC in the list:

secops-mcp.get_security_alerts(
    query=IOC_based_query,
    hours_back=TIME_FRAME_HOURS
)

Store summary in RELATED_SIEM_ALERTS:

• Alert count
• Alert types/names
• Severity distribution
• Affected assets

Step 2: Correlate Cases

Search for cases containing any IOC:

secops-soar.list_cases(
    filter=IOC_based_filter + SOAR_CASE_FILTER
)

Store summary in RELATED_SOAR_CASES:

• Case IDs and names
• Case status
• Case priority

Required Outputs

After completing this skill, you MUST report these outputs:

Output	Description
RELATED_SIEM_ALERTS	Summary of SIEM alerts related to the IOC(s)
RELATED_CASES	Summary of cases related to the IOC(s)
CORRELATION_STATUS	Success/failure status of the correlation
MALICIOUS_CONFIDENCE	Derived confidence based on alert history: high, medium, low, or none

Use Cases

1. Before Investigation - Check if IOC is already under investigation
2. During Enrichment - Understand internal activity for an IOC
3. Threat Hunt - Find all alerts/cases related to campaign indicators
4. Incident Response - Identify scope of compromise across cases

Correlation Summary Template

IOC Correlation Summary for [IOC_LIST]:

SIEM Alerts (last [TIME_FRAME_HOURS] hours):
- Total alerts: [count]
- Alert types: [list]
- Affected hosts: [list]

Related Cases:
- Open cases: [count] - [IDs]
- Closed cases: [count]
- Related investigations: [summary]