NRT Azure DevOps Audit Stream Disabled

ADOAuditLogs
| where OperationName =~ "AuditLog.StreamDisabledByUser"
| extend StreamType = tostring(Data.ConsumerType)
| project-reorder TimeGenerated, Details, ActorUPN, IpAddress, UserAgent, StreamType
| extend timestamp = TimeGenerated
| extend AccountName = tostring(split(ActorUPN, "@")[0]), AccountUPNSuffix = tostring(split(ActorUPN, "@")[1])

tactics:
- DefenseEvasion
name: NRT Azure DevOps Audit Stream Disabled
kind: NRT
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/AzureDevOpsAuditing/Analytic%20Rules/NRT_ADOAuditStreamDisabled.yaml
description: |
  'Azure DevOps allow for audit logs to be streamed to external storage solutions such as SIEM solutions. An attacker looking to hide malicious Azure DevOps activity from defenders may look to disable data streams before conducting activity and then re-enabling the stream after (so as not to raise data threshold-based alarms). Looking for disabled audit streams can identify this activity, and due to the nature of the action its unlikely to have a high false positive rate.'
status: Available
query: |
  ADOAuditLogs
  | where OperationName =~ "AuditLog.StreamDisabledByUser"
  | extend StreamType = tostring(Data.ConsumerType)
  | project-reorder TimeGenerated, Details, ActorUPN, IpAddress, UserAgent, StreamType
  | extend timestamp = TimeGenerated
  | extend AccountName = tostring(split(ActorUPN, "@")[0]), AccountUPNSuffix = tostring(split(ActorUPN, "@")[1])
requiredDataConnectors: []
relevantTechniques:
- T1562.008
severity: High
entityMappings:
- fieldMappings:
  - columnName: ActorUPN
    identifier: FullName
  - columnName: AccountName
    identifier: Name
  - columnName: AccountUPNSuffix
    identifier: UPNSuffix
  entityType: Account
- fieldMappings:
  - columnName: IpAddress
    identifier: Address
  entityType: IP
version: 1.0.4
id: 74ed028d-e392-40b7-baef-e69627bf89d1

{
  "$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/74ed028d-e392-40b7-baef-e69627bf89d1')]",
      "kind": "NRT",
      "name": "[concat(parameters('workspace'),'/Microsoft.SecurityInsights/74ed028d-e392-40b7-baef-e69627bf89d1')]",
      "properties": {
        "alertRuleTemplateName": "74ed028d-e392-40b7-baef-e69627bf89d1",
        "customDetails": null,
        "description": "'Azure DevOps allow for audit logs to be streamed to external storage solutions such as SIEM solutions. An attacker looking to hide malicious Azure DevOps activity from defenders may look to disable data streams before conducting activity and then re-enabling the stream after (so as not to raise data threshold-based alarms). Looking for disabled audit streams can identify this activity, and due to the nature of the action its unlikely to have a high false positive rate.'\n",
        "displayName": "NRT Azure DevOps Audit Stream Disabled",
        "enabled": true,
        "entityMappings": [
          {
            "entityType": "Account",
            "fieldMappings": [
              {
                "columnName": "ActorUPN",
                "identifier": "FullName"
              },
              {
                "columnName": "AccountName",
                "identifier": "Name"
              },
              {
                "columnName": "AccountUPNSuffix",
                "identifier": "UPNSuffix"
              }
            ]
          },
          {
            "entityType": "IP",
            "fieldMappings": [
              {
                "columnName": "IpAddress",
                "identifier": "Address"
              }
            ]
          }
        ],
        "OriginalUri": "https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/AzureDevOpsAuditing/Analytic%20Rules/NRT_ADOAuditStreamDisabled.yaml",
        "query": "ADOAuditLogs\n| where OperationName =~ \"AuditLog.StreamDisabledByUser\"\n| extend StreamType = tostring(Data.ConsumerType)\n| project-reorder TimeGenerated, Details, ActorUPN, IpAddress, UserAgent, StreamType\n| extend timestamp = TimeGenerated\n| extend AccountName = tostring(split(ActorUPN, \"@\")[0]), AccountUPNSuffix = tostring(split(ActorUPN, \"@\")[1])\n",
        "severity": "High",
        "status": "Available",
        "subTechniques": [
          "T1562.008"
        ],
        "suppressionDuration": "PT1H",
        "suppressionEnabled": false,
        "tactics": [
          "DefenseEvasion"
        ],
        "techniques": [
          "T1562"
        ],
        "templateVersion": "1.0.4"
      },
      "type": "Microsoft.OperationalInsights/workspaces/providers/alertRules"
    }
  ]
}