TI Map IP Entity to SigninLogs

let dt_lookBack = 1h;
let ioc_lookBack = 14d;
let Signins = materialize(union isfuzzy=true
  (SigninLogs
  | where TimeGenerated >= ago(dt_lookBack)),
  (AADNonInteractiveUserSignInLogs
  | where TimeGenerated >= ago(dt_lookBack)
  | extend Status = todynamic(Status), LocationDetails = todynamic(LocationDetails)));
let SigninIPs = Signins | summarize make_list(IPAddress);
let TI = materialize(ThreatIntelIndicators
//extract key part of kv pair
     | extend IndicatorType = replace(@"\[|\]|\""", "", tostring(split(ObservableKey, ":", 0)))
     | where isnotempty(IndicatorType) and IndicatorType == "ipv4-addr"
     | extend NetworkSourceIP = toupper(ObservableValue)
     | extend TrafficLightProtocolLevel = tostring(parse_json(AdditionalFields).TLPLevel)
  | where isnotempty(NetworkSourceIP)
  | where TimeGenerated >= ago(ioc_lookBack)
  | extend TI_ipEntity = NetworkSourceIP
  | extend Url = iff(ObservableKey == "url:value", ObservableValue, "")
  | where TI_ipEntity in (SigninIPs)
  | summarize LatestIndicatorTime = arg_max(TimeGenerated, *) by Id
  | extend Description = tostring(parse_json(Data).description)
  | where IsActive == true and ValidUntil > now()
  | where Description !contains_cs "State: inactive;" and Description !contains_cs "State: falsepos;");
TI
   | project-reorder *, Tags, TrafficLightProtocolLevel, NetworkSourceIP, Type, TI_ipEntity
// using innerunique to keep perf fast and result set low, we only need one match to indicate potential malicious activity that needs to be investigated
| join kind=innerunique (Signins) on $left.TI_ipEntity == $right.IPAddress
| project-rename SigninLogs_TimeGenerated = TimeGenerated
| where SigninLogs_TimeGenerated < ValidUntil
| extend StatusCode = tostring(Status.errorCode), StatusDetails = tostring(Status.additionalDetails), StatusReason = tostring(Status.failureReason)
| summarize SigninLogs_TimeGenerated = arg_max(SigninLogs_TimeGenerated, *) by Id, IPAddress
| extend Description = tostring(parse_json(Data).description)
| extend ActivityGroupNames = extract(@"ActivityGroup:(\S+)", 1, tostring(parse_json(Data).labels))
| project SigninLogs_TimeGenerated, Description, ActivityGroupNames, Id, ValidUntil, Confidence, TI_ipEntity, IPAddress, UserPrincipalName, AppDisplayName, StatusCode, StatusDetails, StatusReason, NetworkSourceIP, Type, Url
| extend timestamp = SigninLogs_TimeGenerated, Name = tostring(split(UserPrincipalName, '@', 0)[0]), UPNSuffix = tostring(split(UserPrincipalName, '@', 1)[0])

entityMappings:
- fieldMappings:
  - columnName: UserPrincipalName
    identifier: FullName
  - columnName: Name
    identifier: Name
  - columnName: UPNSuffix
    identifier: UPNSuffix
  entityType: Account
- fieldMappings:
  - columnName: IPAddress
    identifier: Address
  entityType: IP
- fieldMappings:
  - columnName: Url
    identifier: Url
  entityType: URL
queryPeriod: 14d
requiredDataConnectors:
- dataTypes:
  - ThreatIntelligenceIndicator
  connectorId: ThreatIntelligence
- dataTypes:
  - ThreatIntelligenceIndicator
  connectorId: ThreatIntelligenceTaxii
- dataTypes:
  - SigninLogs
  connectorId: AzureActiveDirectory
- dataTypes:
  - AADNonInteractiveUserSignInLogs
  connectorId: AzureActiveDirectory
- dataTypes:
  - ThreatIntelligenceIndicator
  connectorId: MicrosoftDefenderThreatIntelligence
triggerThreshold: 0
kind: Scheduled
relevantTechniques:
- T1071
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Threat Intelligence (NEW)/Analytic Rules/IPEntity_SigninLogs_Updated.yaml
name: TI Map IP Entity to SigninLogs
query: |
  let dt_lookBack = 1h;
  let ioc_lookBack = 14d;
  let Signins = materialize(union isfuzzy=true
    (SigninLogs
    | where TimeGenerated >= ago(dt_lookBack)),
    (AADNonInteractiveUserSignInLogs
    | where TimeGenerated >= ago(dt_lookBack)
    | extend Status = todynamic(Status), LocationDetails = todynamic(LocationDetails)));
  let SigninIPs = Signins | summarize make_list(IPAddress);
  let TI = materialize(ThreatIntelIndicators
  //extract key part of kv pair
       | extend IndicatorType = replace(@"\[|\]|\""", "", tostring(split(ObservableKey, ":", 0)))
       | where isnotempty(IndicatorType) and IndicatorType == "ipv4-addr"
       | extend NetworkSourceIP = toupper(ObservableValue)
       | extend TrafficLightProtocolLevel = tostring(parse_json(AdditionalFields).TLPLevel)
    | where isnotempty(NetworkSourceIP)
    | where TimeGenerated >= ago(ioc_lookBack)
    | extend TI_ipEntity = NetworkSourceIP
    | extend Url = iff(ObservableKey == "url:value", ObservableValue, "")
    | where TI_ipEntity in (SigninIPs)
    | summarize LatestIndicatorTime = arg_max(TimeGenerated, *) by Id
    | extend Description = tostring(parse_json(Data).description)
    | where IsActive == true and ValidUntil > now()
    | where Description !contains_cs "State: inactive;" and Description !contains_cs "State: falsepos;");
  TI
     | project-reorder *, Tags, TrafficLightProtocolLevel, NetworkSourceIP, Type, TI_ipEntity
  // using innerunique to keep perf fast and result set low, we only need one match to indicate potential malicious activity that needs to be investigated
  | join kind=innerunique (Signins) on $left.TI_ipEntity == $right.IPAddress
  | project-rename SigninLogs_TimeGenerated = TimeGenerated
  | where SigninLogs_TimeGenerated < ValidUntil
  | extend StatusCode = tostring(Status.errorCode), StatusDetails = tostring(Status.additionalDetails), StatusReason = tostring(Status.failureReason)
  | summarize SigninLogs_TimeGenerated = arg_max(SigninLogs_TimeGenerated, *) by Id, IPAddress
  | extend Description = tostring(parse_json(Data).description)
  | extend ActivityGroupNames = extract(@"ActivityGroup:(\S+)", 1, tostring(parse_json(Data).labels))
  | project SigninLogs_TimeGenerated, Description, ActivityGroupNames, Id, ValidUntil, Confidence, TI_ipEntity, IPAddress, UserPrincipalName, AppDisplayName, StatusCode, StatusDetails, StatusReason, NetworkSourceIP, Type, Url
  | extend timestamp = SigninLogs_TimeGenerated, Name = tostring(split(UserPrincipalName, '@', 0)[0]), UPNSuffix = tostring(split(UserPrincipalName, '@', 1)[0])  
version: 1.3.0
id: edfc9d8a-6fb3-49e2-80c9-fea15d941799
tactics:
- CommandAndControl
queryFrequency: 1h
triggerOperator: gt
description: |
    'This query maps any IP indicators of compromise (IOCs) from threat intelligence (TI), by searching for matches in SigninLogs.'
severity: Medium

{
  "$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/edfc9d8a-6fb3-49e2-80c9-fea15d941799')]",
      "kind": "Scheduled",
      "name": "[concat(parameters('workspace'),'/Microsoft.SecurityInsights/edfc9d8a-6fb3-49e2-80c9-fea15d941799')]",
      "properties": {
        "alertRuleTemplateName": "edfc9d8a-6fb3-49e2-80c9-fea15d941799",
        "customDetails": null,
        "description": "'This query maps any IP indicators of compromise (IOCs) from threat intelligence (TI), by searching for matches in SigninLogs.'\n",
        "displayName": "TI Map IP Entity to SigninLogs",
        "enabled": true,
        "entityMappings": [
          {
            "entityType": "Account",
            "fieldMappings": [
              {
                "columnName": "UserPrincipalName",
                "identifier": "FullName"
              },
              {
                "columnName": "Name",
                "identifier": "Name"
              },
              {
                "columnName": "UPNSuffix",
                "identifier": "UPNSuffix"
              }
            ]
          },
          {
            "entityType": "IP",
            "fieldMappings": [
              {
                "columnName": "IPAddress",
                "identifier": "Address"
              }
            ]
          },
          {
            "entityType": "URL",
            "fieldMappings": [
              {
                "columnName": "Url",
                "identifier": "Url"
              }
            ]
          }
        ],
        "OriginalUri": "https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Threat Intelligence (NEW)/Analytic Rules/IPEntity_SigninLogs_Updated.yaml",
        "query": "let dt_lookBack = 1h;\nlet ioc_lookBack = 14d;\nlet Signins = materialize(union isfuzzy=true\n  (SigninLogs\n  | where TimeGenerated >= ago(dt_lookBack)),\n  (AADNonInteractiveUserSignInLogs\n  | where TimeGenerated >= ago(dt_lookBack)\n  | extend Status = todynamic(Status), LocationDetails = todynamic(LocationDetails)));\nlet SigninIPs = Signins | summarize make_list(IPAddress);\nlet TI = materialize(ThreatIntelIndicators\n//extract key part of kv pair\n     | extend IndicatorType = replace(@\"\\[|\\]|\\\"\"\", \"\", tostring(split(ObservableKey, \":\", 0)))\n     | where isnotempty(IndicatorType) and IndicatorType == \"ipv4-addr\"\n     | extend NetworkSourceIP = toupper(ObservableValue)\n     | extend TrafficLightProtocolLevel = tostring(parse_json(AdditionalFields).TLPLevel)\n  | where isnotempty(NetworkSourceIP)\n  | where TimeGenerated >= ago(ioc_lookBack)\n  | extend TI_ipEntity = NetworkSourceIP\n  | extend Url = iff(ObservableKey == \"url:value\", ObservableValue, \"\")\n  | where TI_ipEntity in (SigninIPs)\n  | summarize LatestIndicatorTime = arg_max(TimeGenerated, *) by Id\n  | extend Description = tostring(parse_json(Data).description)\n  | where IsActive == true and ValidUntil > now()\n  | where Description !contains_cs \"State: inactive;\" and Description !contains_cs \"State: falsepos;\");\nTI\n   | project-reorder *, Tags, TrafficLightProtocolLevel, NetworkSourceIP, Type, TI_ipEntity\n// using innerunique to keep perf fast and result set low, we only need one match to indicate potential malicious activity that needs to be investigated\n| join kind=innerunique (Signins) on $left.TI_ipEntity == $right.IPAddress\n| project-rename SigninLogs_TimeGenerated = TimeGenerated\n| where SigninLogs_TimeGenerated < ValidUntil\n| extend StatusCode = tostring(Status.errorCode), StatusDetails = tostring(Status.additionalDetails), StatusReason = tostring(Status.failureReason)\n| summarize SigninLogs_TimeGenerated = arg_max(SigninLogs_TimeGenerated, *) by Id, IPAddress\n| extend Description = tostring(parse_json(Data).description)\n| extend ActivityGroupNames = extract(@\"ActivityGroup:(\\S+)\", 1, tostring(parse_json(Data).labels))\n| project SigninLogs_TimeGenerated, Description, ActivityGroupNames, Id, ValidUntil, Confidence, TI_ipEntity, IPAddress, UserPrincipalName, AppDisplayName, StatusCode, StatusDetails, StatusReason, NetworkSourceIP, Type, Url\n| extend timestamp = SigninLogs_TimeGenerated, Name = tostring(split(UserPrincipalName, '@', 0)[0]), UPNSuffix = tostring(split(UserPrincipalName, '@', 1)[0])\n",
        "queryFrequency": "PT1H",
        "queryPeriod": "P14D",
        "severity": "Medium",
        "subTechniques": [],
        "suppressionDuration": "PT1H",
        "suppressionEnabled": false,
        "tactics": [
          "CommandAndControl"
        ],
        "techniques": [
          "T1071"
        ],
        "templateVersion": "1.3.0",
        "triggerOperator": "GreaterThan",
        "triggerThreshold": 0
      },
      "type": "Microsoft.OperationalInsights/workspaces/providers/alertRules"
    }
  ]
}