{
  "$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/4b93c5af-d20b-4236-b696-a28b8c51407f')]",
      "kind": "Scheduled",
      "name": "[concat(parameters('workspace'),'/Microsoft.SecurityInsights/4b93c5af-d20b-4236-b696-a28b8c51407f')]",
      "properties": {
        "alertRuleTemplateName": "4b93c5af-d20b-4236-b696-a28b8c51407f",
        "customDetails": null,
        "description": "'Identifies when a user account is created and then deleted within 10 minutes. This can be an indication of compromise and an adversary attempting to hide in the noise.'\n",
        "displayName": "User account created and deleted within 10 mins",
        "enabled": true,
        "entityMappings": [
          {
            "entityType": "Account",
            "fieldMappings": [
              {
                "columnName": "AccountUsedToCreate",
                "identifier": "FullName"
              },
              {
                "columnName": "CreatedBySubjectUserName",
                "identifier": "Name"
              },
              {
                "columnName": "CreatedBySubjectDomainName",
                "identifier": "NTDomain"
              }
            ]
          },
          {
            "entityType": "Account",
            "fieldMappings": [
              {
                "columnName": "AccountUsedToDelete",
                "identifier": "FullName"
              },
              {
                "columnName": "DeletedBySubjectUserName",
                "identifier": "Name"
              },
              {
                "columnName": "DeletedBySubjectDomainName",
                "identifier": "NTDomain"
              }
            ]
          },
          {
            "entityType": "Account",
            "fieldMappings": [
              {
                "columnName": "TargetAccount",
                "identifier": "FullName"
              },
              {
                "columnName": "TargetUserName",
                "identifier": "Name"
              },
              {
                "columnName": "TargetDomainName",
                "identifier": "NTDomain"
              }
            ]
          },
          {
            "entityType": "Account",
            "fieldMappings": [
              {
                "columnName": "TargetSid",
                "identifier": "Sid"
              }
            ]
          },
          {
            "entityType": "Host",
            "fieldMappings": [
              {
                "columnName": "Computer",
                "identifier": "FullName"
              },
              {
                "columnName": "HostName",
                "identifier": "HostName"
              },
              {
                "columnName": "HostNameDomain",
                "identifier": "NTDomain"
              }
            ]
          }
        ],
        "OriginalUri": "https://github.com/Azure/Azure-Sentinel/blob/master/Detections/SecurityEvent/UserAccountCreatedDeleted_10m.yaml",
        "query": "let timeframe = 1d;\nlet spanoftime = 10m;\nlet threshold = 0;\n(union isfuzzy=true\n    (SecurityEvent\n    | where TimeGenerated > ago(timeframe+spanoftime)\n    // A user account was created\n    | where EventID == 4720\n    | where AccountType =~ \"User\"\n    | project creationTime = TimeGenerated, CreateEventID = EventID, CreateActivity = Activity, Computer = toupper(Computer), \n    TargetAccount = tolower(TargetAccount), TargetUserName, TargetDomainName, TargetSid, \n    AccountUsedToCreate = SubjectAccount, CreatedBySubjectUserName = SubjectUserName, CreatedBySubjectDomainName = SubjectDomainName, SIDofAccountUsedToCreate = SubjectUserSid, UserPrincipalName\n    ),\n    (\n    WindowsEvent\n    | where TimeGenerated > ago(timeframe+spanoftime)\n    // A user account was created\n    | where EventID == 4720\n    | extend SubjectUserSid = tostring(EventData.SubjectUserSid)\n    | extend AccountType=case(EventData.SubjectUserName endswith \"$\" or SubjectUserSid in (\"S-1-5-18\", \"S-1-5-19\", \"S-1-5-20\"), \"Machine\", isempty(SubjectUserSid), \"\", \"User\")\n    | where AccountType =~ \"User\"\n    | extend SubjectAccount = strcat(tostring(EventData.SubjectDomainName),\"\\\\\", tostring(EventData.SubjectUserName))\n    | extend SubjectDomainName = tostring(EventData.SubjectDomainName), SubjectUserName = tostring(EventData.SubjectUserName)\n    | extend TargetAccount = strcat(EventData.TargetDomainName,\"\\\\\", EventData.TargetUserName)\n    | extend TargetSid = tostring(EventData.TargetSid)\n    | extend UserPrincipalName = tostring(EventData.UserPrincipalName)\n    | extend Activity = \"4720 - A user account was created.\"\n    | extend TargetUserName = tostring(EventData.TargetUserName), TargetDomainName = tostring(EventData.TargetDomainName) \n    | project creationTime = TimeGenerated, CreateEventID = EventID, CreateActivity = Activity, Computer = toupper(Computer), \n    TargetAccount = tolower(TargetAccount), TargetUserName, TargetDomainName, TargetSid, \n    AccountUsedToCreate = SubjectAccount, CreatedBySubjectUserName = SubjectUserName, CreatedBySubjectDomainName = SubjectDomainName, SIDofAccountUsedToCreate = SubjectUserSid, UserPrincipalName\n    )\n  )\n| join kind = inner \n(\n  (union isfuzzy=true\n    (SecurityEvent\n    | where TimeGenerated > ago(timeframe)\n    // A user account was deleted\n    | where EventID == 4726\n    | where AccountType == \"User\"\n    | project deletionTime = TimeGenerated, DeleteEventID = EventID, DeleteActivity = Activity, Computer = toupper(Computer), \n    TargetAccount = tolower(TargetAccount), TargetUserName, TargetDomainName, TargetSid, \n    AccountUsedToDelete = SubjectAccount, DeletedBySubjectUserName = SubjectUserName, DeletedBySubjectDomainName = SubjectDomainName, SIDofAccountUsedToDelete = SubjectUserSid, UserPrincipalName\n    ),\n    (WindowsEvent\n    | where TimeGenerated > ago(timeframe)\n    // A user account was deleted\n    | where EventID == 4726\n    | extend SubjectUserSid = tostring(EventData.SubjectUserSid)\n    | extend SubjectAccount = strcat(tostring(EventData.SubjectDomainName),\"\\\\\", tostring(EventData.SubjectUserName))\n    | extend AccountType=case(SubjectAccount endswith \"$\" or SubjectUserSid in (\"S-1-5-18\", \"S-1-5-19\", \"S-1-5-20\"), \"Machine\", isempty(SubjectUserSid), \"\", \"User\")\n    | where AccountType == \"User\"\n    | extend SubjectDomainName = tostring(EventData.SubjectDomainName), SubjectUserName = tostring(EventData.SubjectUserName)\n    | extend TargetSid = tostring(EventData.TargetSid)\n    | extend UserPrincipalName = tostring(EventData.UserPrincipalName)\n    | extend Activity = \"4726 - A user account was deleted.\"\n    | extend TargetUserName = tostring(EventData.TargetUserName), TargetDomainName = tostring(EventData.TargetDomainName) \n    | extend TargetAccount = strcat(EventData.TargetDomainName,\"\\\\\", EventData.TargetUserName)\n    | project deletionTime = TimeGenerated, DeleteEventID = EventID, DeleteActivity = Activity, Computer = toupper(Computer), \n    TargetAccount = tolower(TargetAccount), TargetUserName, TargetDomainName, TargetSid, \n    AccountUsedToDelete = SubjectAccount, DeletedBySubjectUserName = SubjectUserName, DeletedBySubjectDomainName = SubjectDomainName, SIDofAccountUsedToDelete = SubjectUserSid, UserPrincipalName\n    )\n  )\n) on Computer, TargetAccount\n| where deletionTime - creationTime < spanoftime\n| extend TimeDelta = deletionTime - creationTime\n| where tolong(TimeDelta) >= threshold\n| project TimeDelta, creationTime, CreateEventID, CreateActivity, Computer, TargetAccount, TargetSid, UserPrincipalName, AccountUsedToCreate, SIDofAccountUsedToCreate,\ndeletionTime, DeleteEventID, DeleteActivity, AccountUsedToDelete, SIDofAccountUsedToDelete, TargetUserName, TargetDomainName, \nCreatedBySubjectUserName, CreatedBySubjectDomainName, DeletedBySubjectUserName, DeletedBySubjectDomainName\n| extend HostName = tostring(split(Computer, \".\")[0]), DomainIndex = toint(indexof(Computer, '.'))\n| extend HostNameDomain = iff(DomainIndex != -1, substring(Computer, DomainIndex + 1), Computer)\n| project-away DomainIndex\n",
        "queryFrequency": "P1D",
        "queryPeriod": "PT25H",
        "severity": "Medium",
        "subTechniques": [],
        "suppressionDuration": "PT1H",
        "suppressionEnabled": false,
        "tactics": [
          "Persistence",
          "PrivilegeEscalation"
        ],
        "techniques": [
          "T1078",
          "T1098"
        ],
        "templateVersion": "1.2.2",
        "triggerOperator": "GreaterThan",
        "triggerThreshold": 0
      },
      "type": "Microsoft.OperationalInsights/workspaces/providers/alertRules"
    }
  ]
}