TI Map Domain Entity to DeviceNetworkEvents

Back


Id	c308b2f3-eebe-4a20-905c-cb8293b062db
Rulename	TI Map Domain Entity to DeviceNetworkEvents
Description	This query identifies any Domain indicators of compromise (IOCs) from threat intelligence (TI) by searching for matches in DeviceNetworkEvents.
Severity	Medium
Tactics	CommandAndControl
Techniques	T1071
Required data connectors	MicrosoftDefenderThreatIntelligence MicrosoftThreatProtection ThreatIntelligence ThreatIntelligenceTaxii
Kind	Scheduled
Query frequency	1h
Query period	14d
Trigger threshold	0
Trigger operator	gt
Source Uri	https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Threat Intelligence/Analytic Rules/DomainEntity_DeviceNetworkEvents.yaml
Version	1.0.1
Arm template	c308b2f3-eebe-4a20-905c-cb8293b062db.json

KQL

let dt_lookBack = 1h;
let ioc_lookBack = 14d;
let DeviceNetworkEvents_ = DeviceNetworkEvents
  | where isnotempty(RemoteUrl)
  | where TimeGenerated >= ago(dt_lookBack)
  | where ActionType !has "ConnectionFailed"
  | extend Domain = tostring(parse_url(tolower(RemoteUrl)).Host)
  | where isnotempty(Domain)
  | project-rename DeviceNetworkEvents_TimeGenerated = TimeGenerated;
let DeviceNetworkEventDomains = DeviceNetworkEvents_
  | distinct Domain
  | summarize make_list(Domain);
ThreatIntelligenceIndicator
| where isnotempty(DomainName)
| where TimeGenerated >= ago(ioc_lookBack)
| extend TI_Domain = tolower(DomainName)
| where TI_Domain in (DeviceNetworkEventDomains)
| summarize LatestIndicatorTime = arg_max(TimeGenerated, *) by IndicatorId
| where Active == true and ExpirationDateTime > now()
| where Description !contains_cs "State: inactive;" and Description !contains_cs "State: falsepos;"
| join kind=innerunique (DeviceNetworkEvents_) on $left.TI_Domain == $right.Domain
| where DeviceNetworkEvents_TimeGenerated < ExpirationDateTime
| summarize DeviceNetworkEvents_TimeGenerated = arg_max(DeviceNetworkEvents_TimeGenerated, *) by IndicatorId, TI_Domain
| project DeviceNetworkEvents_TimeGenerated, IndicatorId, TI_Domain, Url = RemoteUrl, ConfidenceScore, Description, ThreatType, Tags, TrafficLightProtocolLevel, ActionType, DeviceId, DeviceName, InitiatingProcessAccountUpn, InitiatingProcessCommandLine, RemoteIP, RemotePort
| extend Name = tostring(split(InitiatingProcessAccountUpn, '@', 0)[0]), UPNSuffix = tostring(split(InitiatingProcessAccountUpn, '@', 1)[0])
| extend timestamp = DeviceNetworkEvents_TimeGenerated, UserPrincipalName = InitiatingProcessAccountUpn

YAML

version: 1.0.1
severity: Medium
queryFrequency: 1h
triggerOperator: gt
relevantTechniques:
- T1071
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Threat Intelligence/Analytic Rules/DomainEntity_DeviceNetworkEvents.yaml
kind: Scheduled
triggerThreshold: 0
query: |
  let dt_lookBack = 1h;
  let ioc_lookBack = 14d;
  let DeviceNetworkEvents_ = DeviceNetworkEvents
    | where isnotempty(RemoteUrl)
    | where TimeGenerated >= ago(dt_lookBack)
    | where ActionType !has "ConnectionFailed"
    | extend Domain = tostring(parse_url(tolower(RemoteUrl)).Host)
    | where isnotempty(Domain)
    | project-rename DeviceNetworkEvents_TimeGenerated = TimeGenerated;
  let DeviceNetworkEventDomains = DeviceNetworkEvents_
    | distinct Domain
    | summarize make_list(Domain);
  ThreatIntelligenceIndicator
  | where isnotempty(DomainName)
  | where TimeGenerated >= ago(ioc_lookBack)
  | extend TI_Domain = tolower(DomainName)
  | where TI_Domain in (DeviceNetworkEventDomains)
  | summarize LatestIndicatorTime = arg_max(TimeGenerated, *) by IndicatorId
  | where Active == true and ExpirationDateTime > now()
  | where Description !contains_cs "State: inactive;" and Description !contains_cs "State: falsepos;"
  | join kind=innerunique (DeviceNetworkEvents_) on $left.TI_Domain == $right.Domain
  | where DeviceNetworkEvents_TimeGenerated < ExpirationDateTime
  | summarize DeviceNetworkEvents_TimeGenerated = arg_max(DeviceNetworkEvents_TimeGenerated, *) by IndicatorId, TI_Domain
  | project DeviceNetworkEvents_TimeGenerated, IndicatorId, TI_Domain, Url = RemoteUrl, ConfidenceScore, Description, ThreatType, Tags, TrafficLightProtocolLevel, ActionType, DeviceId, DeviceName, InitiatingProcessAccountUpn, InitiatingProcessCommandLine, RemoteIP, RemotePort
  | extend Name = tostring(split(InitiatingProcessAccountUpn, '@', 0)[0]), UPNSuffix = tostring(split(InitiatingProcessAccountUpn, '@', 1)[0])
  | extend timestamp = DeviceNetworkEvents_TimeGenerated, UserPrincipalName = InitiatingProcessAccountUpn  
entityMappings:
- fieldMappings:
  - columnName: Name
    identifier: Name
  - columnName: UPNSuffix
    identifier: UPNSuffix
  entityType: Account
- fieldMappings:
  - columnName: DeviceName
    identifier: FullName
  entityType: Host
- fieldMappings:
  - columnName: Url
    identifier: Url
  entityType: URL
- fieldMappings:
  - columnName: InitiatingProcessCommandLine
    identifier: CommandLine
  entityType: Process
name: TI Map Domain Entity to DeviceNetworkEvents
queryPeriod: 14d
description: |
    'This query identifies any Domain indicators of compromise (IOCs) from threat intelligence (TI) by searching for matches in DeviceNetworkEvents.'
requiredDataConnectors:
- dataTypes:
  - DeviceNetworkEvents
  connectorId: MicrosoftThreatProtection
- dataTypes:
  - ThreatIntelligenceIndicator
  connectorId: ThreatIntelligence
- dataTypes:
  - ThreatIntelligenceIndicator
  connectorId: ThreatIntelligenceTaxii
- dataTypes:
  - ThreatIntelligenceIndicator
  connectorId: MicrosoftDefenderThreatIntelligence
id: c308b2f3-eebe-4a20-905c-cb8293b062db
tactics:
- CommandAndControl

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/c308b2f3-eebe-4a20-905c-cb8293b062db')]",
      "kind": "Scheduled",
      "name": "[concat(parameters('workspace'),'/Microsoft.SecurityInsights/c308b2f3-eebe-4a20-905c-cb8293b062db')]",
      "properties": {
        "alertRuleTemplateName": "c308b2f3-eebe-4a20-905c-cb8293b062db",
        "customDetails": null,
        "description": "'This query identifies any Domain indicators of compromise (IOCs) from threat intelligence (TI) by searching for matches in DeviceNetworkEvents.'\n",
        "displayName": "TI Map Domain Entity to DeviceNetworkEvents",
        "enabled": true,
        "entityMappings": [
          {
            "entityType": "Account",
            "fieldMappings": [
              {
                "columnName": "Name",
                "identifier": "Name"
              },
              {
                "columnName": "UPNSuffix",
                "identifier": "UPNSuffix"
              }
            ]
          },
          {
            "entityType": "Host",
            "fieldMappings": [
              {
                "columnName": "DeviceName",
                "identifier": "FullName"
              }
            ]
          },
          {
            "entityType": "URL",
            "fieldMappings": [
              {
                "columnName": "Url",
                "identifier": "Url"
              }
            ]
          },
          {
            "entityType": "Process",
            "fieldMappings": [
              {
                "columnName": "InitiatingProcessCommandLine",
                "identifier": "CommandLine"
              }
            ]
          }
        ],
        "OriginalUri": "https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Threat Intelligence/Analytic Rules/DomainEntity_DeviceNetworkEvents.yaml",
        "query": "let dt_lookBack = 1h;\nlet ioc_lookBack = 14d;\nlet DeviceNetworkEvents_ = DeviceNetworkEvents\n  | where isnotempty(RemoteUrl)\n  | where TimeGenerated >= ago(dt_lookBack)\n  | where ActionType !has \"ConnectionFailed\"\n  | extend Domain = tostring(parse_url(tolower(RemoteUrl)).Host)\n  | where isnotempty(Domain)\n  | project-rename DeviceNetworkEvents_TimeGenerated = TimeGenerated;\nlet DeviceNetworkEventDomains = DeviceNetworkEvents_\n  | distinct Domain\n  | summarize make_list(Domain);\nThreatIntelligenceIndicator\n| where isnotempty(DomainName)\n| where TimeGenerated >= ago(ioc_lookBack)\n| extend TI_Domain = tolower(DomainName)\n| where TI_Domain in (DeviceNetworkEventDomains)\n| summarize LatestIndicatorTime = arg_max(TimeGenerated, *) by IndicatorId\n| where Active == true and ExpirationDateTime > now()\n| where Description !contains_cs \"State: inactive;\" and Description !contains_cs \"State: falsepos;\"\n| join kind=innerunique (DeviceNetworkEvents_) on $left.TI_Domain == $right.Domain\n| where DeviceNetworkEvents_TimeGenerated < ExpirationDateTime\n| summarize DeviceNetworkEvents_TimeGenerated = arg_max(DeviceNetworkEvents_TimeGenerated, *) by IndicatorId, TI_Domain\n| project DeviceNetworkEvents_TimeGenerated, IndicatorId, TI_Domain, Url = RemoteUrl, ConfidenceScore, Description, ThreatType, Tags, TrafficLightProtocolLevel, ActionType, DeviceId, DeviceName, InitiatingProcessAccountUpn, InitiatingProcessCommandLine, RemoteIP, RemotePort\n| extend Name = tostring(split(InitiatingProcessAccountUpn, '@', 0)[0]), UPNSuffix = tostring(split(InitiatingProcessAccountUpn, '@', 1)[0])\n| extend timestamp = DeviceNetworkEvents_TimeGenerated, UserPrincipalName = InitiatingProcessAccountUpn\n",
        "queryFrequency": "PT1H",
        "queryPeriod": "P14D",
        "severity": "Medium",
        "subTechniques": [],
        "suppressionDuration": "PT1H",
        "suppressionEnabled": false,
        "tactics": [
          "CommandAndControl"
        ],
        "techniques": [
          "T1071"
        ],
        "templateVersion": "1.0.1",
        "triggerOperator": "GreaterThan",
        "triggerThreshold": 0
      },
      "type": "Microsoft.OperationalInsights/workspaces/providers/alertRules"
    }
  ]
}