TI map IP entity to Azure Key Vault logs

let dt_lookBack = 1h; // Look back 1 hour for AzureDiagnostics logs
let ioc_lookBack = 14d; // Look back 14 days for threat intelligence indicators
// Fetch threat intelligence indicators related to IP addresses
let IP_Indicators = ThreatIntelIndicators
//extract key part of kv pair
     | extend IndicatorType = replace(@"\[|\]|\""", "", tostring(split(ObservableKey, ":", 0)))
     | where IndicatorType in ("ipv4-addr", "ipv6-addr", "network-traffic")
     | extend NetworkSourceIP = toupper(ObservableValue)
     | extend TrafficLightProtocolLevel = tostring(parse_json(AdditionalFields).TLPLevel)
  | where TimeGenerated >= ago(ioc_lookBack)
  | extend TI_ipEntity = iff(isnotempty(NetworkSourceIP), NetworkSourceIP, NetworkSourceIP)
  | extend TI_ipEntity = iff(isempty(TI_ipEntity) and isnotempty(NetworkSourceIP), NetworkSourceIP, TI_ipEntity)
  | where ipv4_is_private(TI_ipEntity) == false and  TI_ipEntity !startswith "fe80" and TI_ipEntity !startswith "::" and TI_ipEntity !startswith "127."
  | summarize LatestIndicatorTime = arg_max(TimeGenerated, *) by Id, ObservableValue
  | where IsActive and (ValidUntil > now() or isempty(ValidUntil));
// Perform a join between IP indicators and AzureDiagnostics logs for Key Vault events
IP_Indicators
   | project-reorder *, Tags, TrafficLightProtocolLevel, NetworkSourceIP, Type, TI_ipEntity
  // Use innerunique to keep performance fast and result set low, as we only need one match to indicate potential malicious activity that needs investigation
  | join kind=innerunique (
      AzureDiagnostics
      | where ResourceType =~ "VAULTS"
      | where TimeGenerated >= ago(dt_lookBack)
      | extend KeyVaultEvents_TimeGenerated = TimeGenerated, ClientIP = CallerIPAddress
  )
  on $left.TI_ipEntity == $right.ClientIP
  // Filter out logs that occurred after the expiration of the corresponding indicator
  | where KeyVaultEvents_TimeGenerated < ValidUntil
  // Group the results by IndicatorId and ClientIP, and keep the log entry with the latest timestamp
  | summarize KeyVaultEvents_TimeGenerated = arg_max(KeyVaultEvents_TimeGenerated, *) by Id, ClientIP
  // Select the desired output fields
  | extend Description = tostring(parse_json(Data).description)
  | extend ActivityGroupNames = extract(@"ActivityGroup:(\S+)", 1, tostring(parse_json(Data).labels))
  | project KeyVaultEvents_TimeGenerated, Description, ActivityGroupNames, Id, ValidUntil, Confidence,
    TI_ipEntity, ClientIP, ResourceId, SubscriptionId, OperationName, ResultType, CorrelationId, id_s, clientInfo_s, httpStatusCode_d,
    identity_claim_appid_g, identity_claim_http_schemas_microsoft_com_identity_claims_objectidentifier_g, Type
  // Rename the timestamp field
  | extend timestamp = KeyVaultEvents_TimeGenerated

kind: Scheduled
entityMappings:
- entityType: IP
  fieldMappings:
  - columnName: ClientIP
    identifier: Address
- entityType: AzureResource
  fieldMappings:
  - columnName: ResourceId
    identifier: ResourceId
description: |
    Identifies a match in Azure Key Vault logs from any IP IOC from TI
severity: Medium
queryFrequency: 1h
triggerThreshold: 0
relevantTechniques:
- T1071
tactics:
- CommandAndControl
name: TI map IP entity to Azure Key Vault logs
id: 7c8051a7-3d29-4c0d-a340-893423f7b0a5
query: |
  let dt_lookBack = 1h; // Look back 1 hour for AzureDiagnostics logs
  let ioc_lookBack = 14d; // Look back 14 days for threat intelligence indicators
  // Fetch threat intelligence indicators related to IP addresses
  let IP_Indicators = ThreatIntelIndicators
  //extract key part of kv pair
       | extend IndicatorType = replace(@"\[|\]|\""", "", tostring(split(ObservableKey, ":", 0)))
       | where IndicatorType in ("ipv4-addr", "ipv6-addr", "network-traffic")
       | extend NetworkSourceIP = toupper(ObservableValue)
       | extend TrafficLightProtocolLevel = tostring(parse_json(AdditionalFields).TLPLevel)
    | where TimeGenerated >= ago(ioc_lookBack)
    | extend TI_ipEntity = iff(isnotempty(NetworkSourceIP), NetworkSourceIP, NetworkSourceIP)
    | extend TI_ipEntity = iff(isempty(TI_ipEntity) and isnotempty(NetworkSourceIP), NetworkSourceIP, TI_ipEntity)
    | where ipv4_is_private(TI_ipEntity) == false and  TI_ipEntity !startswith "fe80" and TI_ipEntity !startswith "::" and TI_ipEntity !startswith "127."
    | summarize LatestIndicatorTime = arg_max(TimeGenerated, *) by Id, ObservableValue
    | where IsActive and (ValidUntil > now() or isempty(ValidUntil));
  // Perform a join between IP indicators and AzureDiagnostics logs for Key Vault events
  IP_Indicators
     | project-reorder *, Tags, TrafficLightProtocolLevel, NetworkSourceIP, Type, TI_ipEntity
    // Use innerunique to keep performance fast and result set low, as we only need one match to indicate potential malicious activity that needs investigation
    | join kind=innerunique (
        AzureDiagnostics
        | where ResourceType =~ "VAULTS"
        | where TimeGenerated >= ago(dt_lookBack)
        | extend KeyVaultEvents_TimeGenerated = TimeGenerated, ClientIP = CallerIPAddress
    )
    on $left.TI_ipEntity == $right.ClientIP
    // Filter out logs that occurred after the expiration of the corresponding indicator
    | where KeyVaultEvents_TimeGenerated < ValidUntil
    // Group the results by IndicatorId and ClientIP, and keep the log entry with the latest timestamp
    | summarize KeyVaultEvents_TimeGenerated = arg_max(KeyVaultEvents_TimeGenerated, *) by Id, ClientIP
    // Select the desired output fields
    | extend Description = tostring(parse_json(Data).description)
    | extend ActivityGroupNames = extract(@"ActivityGroup:(\S+)", 1, tostring(parse_json(Data).labels))
    | project KeyVaultEvents_TimeGenerated, Description, ActivityGroupNames, Id, ValidUntil, Confidence,
      TI_ipEntity, ClientIP, ResourceId, SubscriptionId, OperationName, ResultType, CorrelationId, id_s, clientInfo_s, httpStatusCode_d,
      identity_claim_appid_g, identity_claim_http_schemas_microsoft_com_identity_claims_objectidentifier_g, Type
    // Rename the timestamp field
    | extend timestamp = KeyVaultEvents_TimeGenerated  
requiredDataConnectors:
- dataTypes:
  - ThreatIntelIndicators
  connectorId: ThreatIntelligence
- dataTypes:
  - ThreatIntelIndicators
  connectorId: ThreatIntelligenceTaxii
- dataTypes:
  - KeyVaultData
  connectorId: AzureKeyVault
- dataTypes:
  - ThreatIntelIndicators
  connectorId: MicrosoftDefenderThreatIntelligence
version: 1.3.7
triggerOperator: gt
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Threat Intelligence (NEW)/Analytic Rules/IPEntity_AzureKeyVault.yaml
queryPeriod: 14d

{
  "$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/7c8051a7-3d29-4c0d-a340-893423f7b0a5')]",
      "kind": "Scheduled",
      "name": "[concat(parameters('workspace'),'/Microsoft.SecurityInsights/7c8051a7-3d29-4c0d-a340-893423f7b0a5')]",
      "properties": {
        "alertRuleTemplateName": "7c8051a7-3d29-4c0d-a340-893423f7b0a5",
        "customDetails": null,
        "description": "Identifies a match in Azure Key Vault logs from any IP IOC from TI\n",
        "displayName": "TI map IP entity to Azure Key Vault logs",
        "enabled": true,
        "entityMappings": [
          {
            "entityType": "IP",
            "fieldMappings": [
              {
                "columnName": "ClientIP",
                "identifier": "Address"
              }
            ]
          },
          {
            "entityType": "AzureResource",
            "fieldMappings": [
              {
                "columnName": "ResourceId",
                "identifier": "ResourceId"
              }
            ]
          }
        ],
        "OriginalUri": "https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Threat Intelligence (NEW)/Analytic Rules/IPEntity_AzureKeyVault.yaml",
        "query": "let dt_lookBack = 1h; // Look back 1 hour for AzureDiagnostics logs\nlet ioc_lookBack = 14d; // Look back 14 days for threat intelligence indicators\n// Fetch threat intelligence indicators related to IP addresses\nlet IP_Indicators = ThreatIntelIndicators\n//extract key part of kv pair\n     | extend IndicatorType = replace(@\"\\[|\\]|\\\"\"\", \"\", tostring(split(ObservableKey, \":\", 0)))\n     | where IndicatorType in (\"ipv4-addr\", \"ipv6-addr\", \"network-traffic\")\n     | extend NetworkSourceIP = toupper(ObservableValue)\n     | extend TrafficLightProtocolLevel = tostring(parse_json(AdditionalFields).TLPLevel)\n  | where TimeGenerated >= ago(ioc_lookBack)\n  | extend TI_ipEntity = iff(isnotempty(NetworkSourceIP), NetworkSourceIP, NetworkSourceIP)\n  | extend TI_ipEntity = iff(isempty(TI_ipEntity) and isnotempty(NetworkSourceIP), NetworkSourceIP, TI_ipEntity)\n  | where ipv4_is_private(TI_ipEntity) == false and  TI_ipEntity !startswith \"fe80\" and TI_ipEntity !startswith \"::\" and TI_ipEntity !startswith \"127.\"\n  | summarize LatestIndicatorTime = arg_max(TimeGenerated, *) by Id, ObservableValue\n  | where IsActive and (ValidUntil > now() or isempty(ValidUntil));\n// Perform a join between IP indicators and AzureDiagnostics logs for Key Vault events\nIP_Indicators\n   | project-reorder *, Tags, TrafficLightProtocolLevel, NetworkSourceIP, Type, TI_ipEntity\n  // Use innerunique to keep performance fast and result set low, as we only need one match to indicate potential malicious activity that needs investigation\n  | join kind=innerunique (\n      AzureDiagnostics\n      | where ResourceType =~ \"VAULTS\"\n      | where TimeGenerated >= ago(dt_lookBack)\n      | extend KeyVaultEvents_TimeGenerated = TimeGenerated, ClientIP = CallerIPAddress\n  )\n  on $left.TI_ipEntity == $right.ClientIP\n  // Filter out logs that occurred after the expiration of the corresponding indicator\n  | where KeyVaultEvents_TimeGenerated < ValidUntil\n  // Group the results by IndicatorId and ClientIP, and keep the log entry with the latest timestamp\n  | summarize KeyVaultEvents_TimeGenerated = arg_max(KeyVaultEvents_TimeGenerated, *) by Id, ClientIP\n  // Select the desired output fields\n  | extend Description = tostring(parse_json(Data).description)\n  | extend ActivityGroupNames = extract(@\"ActivityGroup:(\\S+)\", 1, tostring(parse_json(Data).labels))\n  | project KeyVaultEvents_TimeGenerated, Description, ActivityGroupNames, Id, ValidUntil, Confidence,\n    TI_ipEntity, ClientIP, ResourceId, SubscriptionId, OperationName, ResultType, CorrelationId, id_s, clientInfo_s, httpStatusCode_d,\n    identity_claim_appid_g, identity_claim_http_schemas_microsoft_com_identity_claims_objectidentifier_g, Type\n  // Rename the timestamp field\n  | extend timestamp = KeyVaultEvents_TimeGenerated\n",
        "queryFrequency": "PT1H",
        "queryPeriod": "P14D",
        "severity": "Medium",
        "subTechniques": [],
        "suppressionDuration": "PT1H",
        "suppressionEnabled": false,
        "tactics": [
          "CommandAndControl"
        ],
        "techniques": [
          "T1071"
        ],
        "templateVersion": "1.3.7",
        "triggerOperator": "GreaterThan",
        "triggerThreshold": 0
      },
      "type": "Microsoft.OperationalInsights/workspaces/providers/alertRules"
    }
  ]
}