version: "1.0.1" name: check-duplicates description: "Check for duplicate or similar cases. Use before deep analysis to avoid investigating the same incident twice. Takes a CASE_ID and returns list of similar cases." required_roles: soar: roles/chronicle.editor personas: [tier1-analyst, tier2-analyst, tier3-analyst]

Check Duplicates Skill

Identify potentially duplicate or similar existing cases before starting deep analysis.

Inputs

• CASE_ID - The ID of the current case to check
• ALERT_GROUP_IDENTIFIERS - Alert group identifiers for the case
• (Optional) DAYS_BACK - How many days to search back (default: 7)
• (Optional) INCLUDE_OPEN - Include open cases (default: true)
• (Optional) INCLUDE_CLOSED - Include closed cases (default: false)

Workflow

Step 1: Execute Similarity Check

secops-soar.siemplify_get_similar_cases(
    case_id=CASE_ID,
    alert_group_identifiers=ALERT_GROUP_IDENTIFIERS,
    days_back=DAYS_BACK,
    include_open_cases=INCLUDE_OPEN,
    include_closed_cases=INCLUDE_CLOSED
)

Step 2: Process Results

Extract the list of similar case IDs from the response.

Outputs

Usage Pattern

1. Check duplicates BEFORE enrichment
2. If duplicates found:
   - Review similar case(s)
   - If confirmed duplicate: close as duplicate
   - If related but distinct: note correlation, continue
3. If no duplicates: proceed with analysis

When Duplicates Are Found

If SIMILAR_CASE_IDS is not empty:

1. Document: "Closing as duplicate of [Similar Case ID]"
2. Close with:

• Reason: NOT_MALICIOUS
• Root cause: Similar case is already under investigation