Securin Threat Correlation

Threat Correlation

Purpose

Bridge external threat intelligence (CVEs, ransomware families, threat actors, campaigns) with the user's environment (assets, exposures, components). Answer the core question: "Does this threat matter to me right now?"

This skill is the inverse of securin-cve-enrichment: enrichment produces a global report on a CVE; correlation intersects that CVE (or a threat, or an actor's TTPs) with the user's real data.

When to use

• "Am I affected by CVE-2024-3400?"
• "Does this ransomware campaign hit my environment?"
• "Check if we're vulnerable to Lazarus Group"
• "Show me exposures tied to CISA KEV entries"
• "Which of my open exposures are exploited in the wild?"
• "What threats target the CVEs in my environment?" (outbound direction)

Pre-flight

Step 0 — Account preflight (CC-1)

See _shared/account-preflight.md. Correlation queries always touch the user's environment — you must resolve account-id(s) and validate access before any exposure/asset query. Also detect the composite-vs-source data model (see _shared/composite-vs-source.md) to use the correct asset prefix. This should also give you context about when to use *Query tools and when to use search* and aggregate* tools.

Before using this skill, read every file in the references folder, including the shared references/_shared/ docs. Prefer the cached field catalogs (source-fields.md for source mode, composite-fields.md for composite mode) over calling getApiFields — only fall back to the live tool when an entity or field is missing from the cache.

Suggested tools

Threat intel (global)

• searchVulnerabilityData — CVE record + exploitation signals
• searchThreatActorData — threat actor → CVE list. Actor records are flat — do NOT pass fields: ['threatActor'] (that prefix doesn't match the actual record shape and the call returns empty rows silently). Omit fields, or pass top-level keys like name, vulnerabilities, associatedGroups.
• searchWeaknessData — CWE root cause

User environment

• Source mode — searchExposureData + aggregateExposureData (two calls, same filter when both list and bucket counts are needed).
• Composite mode — exposureQuery (combined search + aggregate, compositeExposure.* prefix).
• Asset pivot: searchAssetData (source) or assetQuery (composite). For source bucket counts pair with aggregateAssetData.

Scoping + access

• getEffectiveAccessWorkspaces
• getAccountSettings — composite FF check
• getApiFields — field discovery

Deep links (CC-2)

• createDeepLink (preferred) — call once per list/aggregation, plus once per bucket if you need per-bucket links
• getDeepLink

Outside

• Web search — resolve named campaigns / news events to CVE lists when the user's input is a name, not a CVE.

Core concept — two-step correlation

Step 1: Threat Intelligence  →  Extract CVEs / indicators
Step 2: Your Environment     →  Find matching exposures / assets / components
Result: Threat Exposure Assessment

Two strategies based on direction.

Strategy A — Inbound (Threat → You)

The user starts with a threat and wants to know if they're affected.

A.1 Resolve threat → CVE list

A.2 Query exposures for the CVE set

Run two calls with the same filter — searchExposureData for the row list, aggregateExposureData for the severity breakdown:

# 1) Itemized list
searchExposureData
filter: exposure.mappedAttributes.vulnerabilityIds in (<cve-list>)
        AND exposure.status = 'Open'
        AND "<account/workspace scope>"

# 2) Severity bucket counts (same filter)
aggregateExposureData
filter: <same as above>
aggs: [{
  name: "bySeverity",
  function: { type: "TERMS", field: "exposure.scores.scoreLevel", size: 10 }
}]

In case of composite mode use exposureQuery in place of the above mentioned tools for search and aggregate.

A.3 Pivot to affected assets

Using assetIds from the exposures (or a separate join):

# Source mode
searchAssetData
filter: asset.assetId in (<asset-ids from A.2>)
sort: "asset.scores.overallScore:desc"

# Composite mode — single call returns list + buckets
assetQuery
filter: compositeAsset.id in (<ids>)
sort: "compositeAsset.scores.overallScore:desc"

A.4 Generate deep links (CC-2)

• One top-level filter link (Exposures view with the CVE-list filter).
• Per-row link for each affected asset / exposure.
• Per-bucket link in the severity breakdown.

A.5 Emit "Threat Exposure Assessment"

## Threat Exposure Assessment — <threat name or CVE>

**Verdict:** AFFECTED / NOT AFFECTED / PARTIAL — <N matched exposures across M assets>

### Matched CVEs
| CVE | Severity | KEV | # Exposures | Link |
|---|---|---|---|---|
| … | … | … | … | [View](<deep link>) |

### Affected Assets
| Asset | Criticality | Reachability | Workspace | # Matched Exposures | Link |
|---|---|---|---|---|---|
| … | … | … | … | … | [View](<deep link>) |

### Severity Breakdown
- Critical: 3 → [View](…)
- High: 11 → [View](…)
- Medium: 27 → [View](…)

### Recommended next steps
- Top-priority remediation: hand off to **securin-remediation-guidance** for CVE-XXXX
- Triage the full list: hand off to **securin-exposure-triage** for SLA review

Strategy B — Outbound (You → Threats)

The user starts with an asset or exposure and wants to know what threats target them.

B.1 Collect CVEs in the user's scope

aggregateExposureData
filter: exposure.status = 'Open' AND "<scope>"
aggs: [{
  name: "byCve",
  function: { type: "TERMS", field: "exposure.mappedAttributes.vulnerabilityIds", size: 200 }
}]

B.2 Enrich each CVE with threat signals

For each CVE (or batched):

searchThreatActorData   filter: vulnerabilities like 'CVE-X'   # bare-path FQL on the actor record; do NOT pass fields:['threatActor']
searchVulnerabilityData filter: vulnerabilityId = 'CVE-X'

B.3 Emit "What Hunts Me" report

## What Hunts Me — <account / workspace scope>

**Top threats targeting your open exposures:**

| Threat / Actor | Type | Your exposed CVEs | # Affected Assets | Link |
|---|---|---|---|---|
| LockBit 3.0 | Ransomware | CVE-…, CVE-… | 14 | [View](…) |
| APT29 | State actor | CVE-…, CVE-… | 3 | [View](…) |

### Recommended next steps
- Deep-dive a specific threat → **securin-cve-enrichment** for the CVE
- Remediation planning → **securin-remediation-guidance**

FQL patterns

See _shared/fql-grammar.md for full grammar. Correlation-specific:

# Exposures matching a CVE set
"exposure.mappedAttributes.vulnerabilityIds" in ('CVE-X','CVE-Y','CVE-Z')

# Exposures on exposed-to-internet assets (source-model)
asset.reachability = 'Exposed'
# Same, composite-model
compositeAsset.reachability = 'Exposed'

# Exposures tied to CISA KEV CVEs (cross-entity to vuln index from exposures)
vulnerabilities.isCisaKEV = true

# In searchVulnerabilityData — bare path, no "vulnerabilities." prefix
vulnerabilityId = 'CVE-X'
isCisaKEV = true

• searchThreatActorData with no filters → an error. Always pass a filter (and OMIT fields: ['threatActor'] — actor records are flat, so that prefix silently returns empty rows; see correlation-patterns.md).
• THREATACTOR field namespace is bare (name, description, vulnerabilityCount, originCountry, targetedCountries, targetedIndustries, associatedGroups) — no threatActor. prefix.
• validateFilter validates both FQL syntax and field existence — a 400 response means either malformed syntax or an invalid field path. Always cross-check paths against Source data API Fields or Composite data API Fields based on the current mode of execution. Use getApiFields as a fallback when a field is not in the cache.

Scope guard (CC-3)

• Global CVE intel only (no environment match) → securin-cve-enrichment.
• Raw exposure triage (no external threat angle) → securin-exposure-triage.
• Asset inventory only → securin-asset-triage.
• Remediation planning → securin-remediation-guidance.
• Unknown capability → fall back to the platform's built-in Securin__search_tools meta-tool to look up the right MCP tool by description.

Edge cases

• Named campaign doesn't map cleanly to CVEs — ask the user to confirm the CVE list from web search before correlating.
• Zero matches — sanity-check composite vs source prefix (#1 cause of silent empties), verify account/workspace scope, verify the exposure.status filter isn't too narrow.
• Threat actor with 200+ CVEs — don't match all 200 blindly. Prioritize by CISA KEV / exploitedInWild first, then correlate.
• New zero-day before it's in the platform — web search may find the CVE before it's indexed; tell the user it's not yet in Core and offer to check back later.

Visual output (CC-4)

When this skill produces aggregated or multi-row data (counts, trends, distributions, comparisons, single-CVE reports), emit a chart/graph/infographic in the Securin brand — multi-series palette (#9C66FF / #7F30FF / #E96001 / #4D268D / #DD639C / …, assigned in order), semantic CHML severity colors (Critical #A60D08 → Info #C5CBD6), Poppins headings on DM Sans body, light theme, and the Securin logo. Use the 10-stop brand purple ramp for heatmaps/sequential scales; gradients are background decoration only — never on chart bars, lines, or slices. Full color system in _shared/brand.md. Offer customization after delivery; never default to a different brand.

References

• Correlation Patterns — inbound/outbound recipes for the common ask shapes.
• Shared: Account Preflight
• Shared: Composite vs Source
• Shared: Deep Links
• Shared: FQL Grammar
• Shared: Sorting Rules
• Shared: Brand & Visual Communication