GTI - CISA Known Exploited Vulnerability Detected | Microsoft Sentinel Analytic Rules

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Id	650429cd-afc6-41a5-90e7-6e4a85b2335d
Rulename	GTI - CISA Known Exploited Vulnerability Detected
Description	Detects vulnerabilities ingested from Google Threat Intelligence that are in the CISA Known Exploited Vulnerabilities (KEV) catalog, meaning CISA has confirmed active exploitation and mandated remediation for federal agencies. Uses the explicit CisaKnownExploited field from the GTIVulnerabilities parser, with Tags-based fallback for coverage.
Severity	High
Tactics	InitialAccess Execution Impact
Techniques	T1190 T1203
Required data connectors	GTIVulnerabilitiesConnector
Kind	Scheduled
Query frequency	10m
Query period	10m
Trigger threshold	0
Trigger operator	gt
Source Uri	https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Google%20Threat%20Intelligence/Analytic%20Rules/Vulnerabilities/GTI_CISAKnownExploitedVulnerability.yaml
Version	1.0.0
Arm template	650429cd-afc6-41a5-90e7-6e4a85b2335d.json

KQL

GTIVulnerabilities
| where isnotempty(CisaKnownExploited)
    or isnotempty(CisaKnownExploitedDueDate)
    or isnotempty(CisaKnownExploitedAddedDate)
    or isnotempty(CisaKnownExploitedRansomwareUse)
    or (isnotempty(Tags) and tolower(tostring(Tags)) has_any ("cisa-kev", "cisa exploited", "cisa_exploited"))
| extend Cvssv3Score = coalesce(Cvssv3xBaseScore, Cvssv3xTranslatedBaseScore)
| extend
    CisaKnownExploitedAddedDate = iif(isnotempty(CisaKnownExploitedAddedDate), datetime_add('second', toint(todouble(CisaKnownExploitedAddedDate)), datetime(1970-01-01)), datetime(null)),
    CisaKnownExploitedDueDate   = iif(isnotempty(CisaKnownExploitedDueDate),   datetime_add('second', toint(todouble(CisaKnownExploitedDueDate)),   datetime(1970-01-01)), datetime(null))
| extend
    Vendor       = tostring(Cpes[0].start_cpe.vendor),
    Product      = tostring(Cpes[0].start_cpe.product),
    CpeVersion   = tostring(Cpes[0].start_cpe.version),
    VendorFixUrl = coalesce(tostring(VendorFixReferences[0].url), tostring(VendorFixReferences[0]))
| mv-apply _c = Cpes on (
    where isnotnull(_c.start_cpe)
    | summarize AffectedVendors  = make_set(tostring(_c.start_cpe.vendor)),
                AffectedProducts = make_set(tostring(_c.start_cpe.product))
  )
| project
    TimeGenerated,
    CveId,
    VulnName,
    RiskRating,
    Priority,
    ExploitationState,
    ExploitationConsequence,
    Cvssv3Score,
    Cvssv4xScore,
    EpssScore,
    EpssPercentile,
    CisaKnownExploitedAddedDate,
    CisaKnownExploitedDueDate,
    CisaKnownExploitedRansomwareUse,
    Vendor,
    Product,
    CpeVersion,
    AffectedVendors,
    AffectedProducts,
    Description,
    VendorFixUrl,
    VendorFixReferences,
    Tags,
    Type

YAML

alertDetailsOverride:
  alertDisplayNameFormat: 'GTI CISA KEV: {{CveId}}'
  alertDescriptionFormat: 'CVE: {{CveId}} | Risk: {{RiskRating}} | State: {{ExploitationState}}'
entityMappings:
- fieldMappings:
  - identifier: Url
    columnName: VendorFixUrl
  entityType: URL
id: 650429cd-afc6-41a5-90e7-6e4a85b2335d
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Google%20Threat%20Intelligence/Analytic%20Rules/Vulnerabilities/GTI_CISAKnownExploitedVulnerability.yaml
triggerOperator: gt
tactics:
- InitialAccess
- Execution
- Impact
kind: Scheduled
requiredDataConnectors:
- dataTypes:
  - GTI_Vulnerabilities_CL
  connectorId: GTIVulnerabilitiesConnector
queryPeriod: 10m
eventGroupingSettings:
  aggregationKind: AlertPerResult
severity: High
relevantTechniques:
- T1190
- T1203
triggerThreshold: 0
version: 1.0.0
customDetails:
  AffectedProduct: Product
  RansomwareUse: CisaKnownExploitedRansomwareUse
  RiskRating: RiskRating
  CveId: CveId
  ExploitState: ExploitationState
  CisaAddedDate: CisaKnownExploitedAddedDate
  Cvssv3Score: Cvssv3Score
  Priority: Priority
  EpssPercentile: EpssPercentile
  AffectedVendor: Vendor
  EpssScore: EpssScore
  CisaDueDate: CisaKnownExploitedDueDate
name: GTI - CISA Known Exploited Vulnerability Detected
status: Available
query: |
  GTIVulnerabilities
  | where isnotempty(CisaKnownExploited)
      or isnotempty(CisaKnownExploitedDueDate)
      or isnotempty(CisaKnownExploitedAddedDate)
      or isnotempty(CisaKnownExploitedRansomwareUse)
      or (isnotempty(Tags) and tolower(tostring(Tags)) has_any ("cisa-kev", "cisa exploited", "cisa_exploited"))
  | extend Cvssv3Score = coalesce(Cvssv3xBaseScore, Cvssv3xTranslatedBaseScore)
  | extend
      CisaKnownExploitedAddedDate = iif(isnotempty(CisaKnownExploitedAddedDate), datetime_add('second', toint(todouble(CisaKnownExploitedAddedDate)), datetime(1970-01-01)), datetime(null)),
      CisaKnownExploitedDueDate   = iif(isnotempty(CisaKnownExploitedDueDate),   datetime_add('second', toint(todouble(CisaKnownExploitedDueDate)),   datetime(1970-01-01)), datetime(null))
  | extend
      Vendor       = tostring(Cpes[0].start_cpe.vendor),
      Product      = tostring(Cpes[0].start_cpe.product),
      CpeVersion   = tostring(Cpes[0].start_cpe.version),
      VendorFixUrl = coalesce(tostring(VendorFixReferences[0].url), tostring(VendorFixReferences[0]))
  | mv-apply _c = Cpes on (
      where isnotnull(_c.start_cpe)
      | summarize AffectedVendors  = make_set(tostring(_c.start_cpe.vendor)),
                  AffectedProducts = make_set(tostring(_c.start_cpe.product))
    )
  | project
      TimeGenerated,
      CveId,
      VulnName,
      RiskRating,
      Priority,
      ExploitationState,
      ExploitationConsequence,
      Cvssv3Score,
      Cvssv4xScore,
      EpssScore,
      EpssPercentile,
      CisaKnownExploitedAddedDate,
      CisaKnownExploitedDueDate,
      CisaKnownExploitedRansomwareUse,
      Vendor,
      Product,
      CpeVersion,
      AffectedVendors,
      AffectedProducts,
      Description,
      VendorFixUrl,
      VendorFixReferences,
      Tags,
      Type
description: |
  Detects vulnerabilities ingested from Google Threat Intelligence that are in the CISA Known
  Exploited Vulnerabilities (KEV) catalog, meaning CISA has confirmed active exploitation and
  mandated remediation for federal agencies. Uses the explicit CisaKnownExploited field from the
  GTIVulnerabilities parser, with Tags-based fallback for coverage.
queryFrequency: 10m
incidentConfiguration:
  groupingConfiguration:
    enabled: true
    lookbackDuration: P1D
    groupByCustomDetails:
    - CveId
    reopenClosedIncident: false
    matchingMethod: Selected
  createIncident: true

ARM

{
  "$schema": "https://schema.management.azure.com/schemas/2019-04-01/deploymentTemplate.json#",
  "contentVersion": "1.0.0.0",
  "parameters": {
    "workspace": {
      "type": "String"
    }
  },
  "resources": [
    {
      "apiVersion": "2024-01-01-preview",
      "id": "[concat(resourceId('Microsoft.OperationalInsights/workspaces/providers', parameters('workspace'), 'Microsoft.SecurityInsights'),'/alertRules/650429cd-afc6-41a5-90e7-6e4a85b2335d')]",
      "kind": "Scheduled",
      "name": "[concat(parameters('workspace'),'/Microsoft.SecurityInsights/650429cd-afc6-41a5-90e7-6e4a85b2335d')]",
      "properties": {
        "alertDetailsOverride": {
          "alertDescriptionFormat": "CVE: {{CveId}} | Risk: {{RiskRating}} | State: {{ExploitationState}}",
          "alertDisplayNameFormat": "GTI CISA KEV: {{CveId}}"
        },
        "alertRuleTemplateName": "650429cd-afc6-41a5-90e7-6e4a85b2335d",
        "customDetails": {
          "AffectedProduct": "Product",
          "AffectedVendor": "Vendor",
          "CisaAddedDate": "CisaKnownExploitedAddedDate",
          "CisaDueDate": "CisaKnownExploitedDueDate",
          "CveId": "CveId",
          "Cvssv3Score": "Cvssv3Score",
          "EpssPercentile": "EpssPercentile",
          "EpssScore": "EpssScore",
          "ExploitState": "ExploitationState",
          "Priority": "Priority",
          "RansomwareUse": "CisaKnownExploitedRansomwareUse",
          "RiskRating": "RiskRating"
        },
        "description": "Detects vulnerabilities ingested from Google Threat Intelligence that are in the CISA Known\nExploited Vulnerabilities (KEV) catalog, meaning CISA has confirmed active exploitation and\nmandated remediation for federal agencies. Uses the explicit CisaKnownExploited field from the\nGTIVulnerabilities parser, with Tags-based fallback for coverage.\n",
        "displayName": "GTI - CISA Known Exploited Vulnerability Detected",
        "enabled": true,
        "entityMappings": [
          {
            "entityType": "URL",
            "fieldMappings": [
              {
                "columnName": "VendorFixUrl",
                "identifier": "Url"
              }
            ]
          }
        ],
        "eventGroupingSettings": {
          "aggregationKind": "AlertPerResult"
        },
        "incidentConfiguration": {
          "createIncident": true,
          "groupingConfiguration": {
            "enabled": true,
            "groupByCustomDetails": [
              "CveId"
            ],
            "lookbackDuration": "P1D",
            "matchingMethod": "Selected",
            "reopenClosedIncident": false
          }
        },
        "OriginalUri": "https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Google%20Threat%20Intelligence/Analytic%20Rules/Vulnerabilities/GTI_CISAKnownExploitedVulnerability.yaml",
        "query": "GTIVulnerabilities\n| where isnotempty(CisaKnownExploited)\n    or isnotempty(CisaKnownExploitedDueDate)\n    or isnotempty(CisaKnownExploitedAddedDate)\n    or isnotempty(CisaKnownExploitedRansomwareUse)\n    or (isnotempty(Tags) and tolower(tostring(Tags)) has_any (\"cisa-kev\", \"cisa exploited\", \"cisa_exploited\"))\n| extend Cvssv3Score = coalesce(Cvssv3xBaseScore, Cvssv3xTranslatedBaseScore)\n| extend\n    CisaKnownExploitedAddedDate = iif(isnotempty(CisaKnownExploitedAddedDate), datetime_add('second', toint(todouble(CisaKnownExploitedAddedDate)), datetime(1970-01-01)), datetime(null)),\n    CisaKnownExploitedDueDate   = iif(isnotempty(CisaKnownExploitedDueDate),   datetime_add('second', toint(todouble(CisaKnownExploitedDueDate)),   datetime(1970-01-01)), datetime(null))\n| extend\n    Vendor       = tostring(Cpes[0].start_cpe.vendor),\n    Product      = tostring(Cpes[0].start_cpe.product),\n    CpeVersion   = tostring(Cpes[0].start_cpe.version),\n    VendorFixUrl = coalesce(tostring(VendorFixReferences[0].url), tostring(VendorFixReferences[0]))\n| mv-apply _c = Cpes on (\n    where isnotnull(_c.start_cpe)\n    | summarize AffectedVendors  = make_set(tostring(_c.start_cpe.vendor)),\n                AffectedProducts = make_set(tostring(_c.start_cpe.product))\n  )\n| project\n    TimeGenerated,\n    CveId,\n    VulnName,\n    RiskRating,\n    Priority,\n    ExploitationState,\n    ExploitationConsequence,\n    Cvssv3Score,\n    Cvssv4xScore,\n    EpssScore,\n    EpssPercentile,\n    CisaKnownExploitedAddedDate,\n    CisaKnownExploitedDueDate,\n    CisaKnownExploitedRansomwareUse,\n    Vendor,\n    Product,\n    CpeVersion,\n    AffectedVendors,\n    AffectedProducts,\n    Description,\n    VendorFixUrl,\n    VendorFixReferences,\n    Tags,\n    Type\n",
        "queryFrequency": "PT10M",
        "queryPeriod": "PT10M",
        "severity": "High",
        "status": "Available",
        "subTechniques": [],
        "suppressionDuration": "PT1H",
        "suppressionEnabled": false,
        "tactics": [
          "Execution",
          "Impact",
          "InitialAccess"
        ],
        "techniques": [
          "T1190",
          "T1203"
        ],
        "templateVersion": "1.0.0",
        "triggerOperator": "GreaterThan",
        "triggerThreshold": 0
      },
      "type": "Microsoft.OperationalInsights/workspaces/providers/alertRules"
    }
  ]
}