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Id17b0ea43-5aeb-4dc4-ac3a-be84acb8d5b7
RulenameVMware ESXi - Root password changed
DescriptionDetects when root user password is changed.
SeverityHigh
TacticsInitialAccess
Persistence
DefenseEvasion
TechniquesT1078
T1098
T1556
Required data connectorsSyslogAma
KindScheduled
Query frequency10m
Query period10m
Trigger threshold0
Trigger operatorgt
Source Urihttps://github.com/Azure/Azure-Sentinel/blob/master/Solutions/VMWareESXi/Analytic%20Rules/ESXiRootPasswordChange.yaml
Version1.0.0
Arm template17b0ea43-5aeb-4dc4-ac3a-be84acb8d5b7.json
Deploy To Azure
VMwareESXi
| where SyslogMessage has_any ("password changed for root","Password was changed for account root")
| extend SrcIpAddr = extract(@'root@(\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3})', 1, SyslogMessage)
entityMappings:
- entityType: IP
  fieldMappings:
  - columnName: SrcIpAddr
    identifier: Address
query: |
  VMwareESXi
  | where SyslogMessage has_any ("password changed for root","Password was changed for account root")
  | extend SrcIpAddr = extract(@'root@(\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3})', 1, SyslogMessage)
id: 17b0ea43-5aeb-4dc4-ac3a-be84acb8d5b7
queryFrequency: 10m
status: Available
version: 1.0.0
severity: High
relevantTechniques:
- T1078
- T1098
- T1556
name: VMware ESXi - Root password changed
kind: Scheduled
tactics:
- InitialAccess
- Persistence
- DefenseEvasion
requiredDataConnectors:
- datatypes:
  - Syslog
  connectorId: SyslogAma
description: |
  'Detects when root user password is changed.'
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/VMWareESXi/Analytic%20Rules/ESXiRootPasswordChange.yaml
triggerOperator: gt
triggerThreshold: 0
queryPeriod: 10m
{
  "$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/17b0ea43-5aeb-4dc4-ac3a-be84acb8d5b7')]",
      "kind": "Scheduled",
      "name": "[concat(parameters('workspace'),'/Microsoft.SecurityInsights/17b0ea43-5aeb-4dc4-ac3a-be84acb8d5b7')]",
      "properties": {
        "alertRuleTemplateName": "17b0ea43-5aeb-4dc4-ac3a-be84acb8d5b7",
        "customDetails": null,
        "description": "'Detects when root user password is changed.'\n",
        "displayName": "VMware ESXi - Root password changed",
        "enabled": true,
        "entityMappings": [
          {
            "entityType": "IP",
            "fieldMappings": [
              {
                "columnName": "SrcIpAddr",
                "identifier": "Address"
              }
            ]
          }
        ],
        "OriginalUri": "https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/VMWareESXi/Analytic%20Rules/ESXiRootPasswordChange.yaml",
        "query": "VMwareESXi\n| where SyslogMessage has_any (\"password changed for root\",\"Password was changed for account root\")\n| extend SrcIpAddr = extract(@'root@(\\d{1,3}\\.\\d{1,3}\\.\\d{1,3}\\.\\d{1,3})', 1, SyslogMessage)\n",
        "queryFrequency": "PT10M",
        "queryPeriod": "PT10M",
        "severity": "High",
        "status": "Available",
        "subTechniques": [],
        "suppressionDuration": "PT1H",
        "suppressionEnabled": false,
        "tactics": [
          "DefenseEvasion",
          "InitialAccess",
          "Persistence"
        ],
        "techniques": [
          "T1078",
          "T1098",
          "T1556"
        ],
        "templateVersion": "1.0.0",
        "triggerOperator": "GreaterThan",
        "triggerThreshold": 0
      },
      "type": "Microsoft.OperationalInsights/workspaces/providers/alertRules"
    }
  ]
}