Defender-CloudAppEvents

ActionType	Title	Sample	Rule
any	Cloud app activity	Y	Y

any: Cloud app activity

Table: CloudAppEvents

Detection Fields #

Fields referenced by at least one attached detection rule. This view counts distinct rules and is not a complete event schema.

Name	Rules	Vendors
`ActionType`	4 detection rules	Kusto
`Application`	2 detection rules	Kusto
`AccountObjectId`	1 detection rule	Kusto
`ApplicationId`	1 detection rule	Kusto
`IPAddress`	1 detection rule	Kusto

Example Event #

{
  "AccountDisplayName": "Admin User",
  "AccountId": "11111111-1111-1111-1111-111111111111",
  "AccountObjectId": "11111111-1111-1111-1111-111111111111",
  "AccountType": "Admin",
  "ActionType": "Add service principal.",
  "ActivityObjects": [
    {
      "Type": "Application",
      "Role": "Parameter",
      "ServiceObjectType": "Azure Service Principal - Object ID"
    },
    {
      "Type": "Application",
      "Role": "Target object",
      "Name": "dw-rt2-delegate"
    },
    {
      "Type": "Application",
      "Role": "Parameter",
      "Id": "Other",
      "ServiceObjectType": "Azure Service Principal - Application ID"
    },
    {
      "Type": "Tenant",
      "Role": "Parameter",
      "Id": "00000000-0000-0000-0000-000000000001"
    },
    {
      "Type": "User",
      "Role": "Actor",
      "Name": "Admin User",
      "Id": "11111111-1111-1111-1111-111111111111",
      "ApplicationId": 11161,
      "ApplicationInstance": 0
    }
  ],
  "ActivityObjects@odata.type": "#Collection(String)",
  "ActivityType": "Add",
  "AdditionalFields": {
    "@odata.type": "#microsoft.graph.security.dynamicColumnValue"
  },
  "AppInstanceId": 0,
  "Application": "Microsoft 365",
  "ApplicationId": 11161,
  "AuditSource": "Defender for Cloud Apps app connector",
  "DeviceType": "Other",
  "IsAdminOperation": 0,
  "IsAdminOperation@odata.type": "#SByte",
  "IsExternalUser": 0,
  "IsExternalUser@odata.type": "#SByte",
  "IsImpersonated": 0,
  "IsImpersonated@odata.type": "#SByte",
  "LastSeenForUser": {
    "@odata.type": "#microsoft.graph.security.dynamicColumnValue",
    "ActionType": 0,
    "ActionType@odata.type": "#Int64",
    "Application": 0,
    "Application@odata.type": "#Int64",
    "OSPlatform": 0,
    "OSPlatform@odata.type": "#Int64",
    "UserAgent": 0,
    "UserAgent@odata.type": "#Int64"
  },
  "OAuthAppId": "5165532d-c344-423b-973e-b4493d5450c5",
  "OSPlatform": "Linux",
  "ObjectName": "dw-rt2-delegate",
  "ObjectType": "Application",
  "RawEventData": {
    "@odata.type": "#microsoft.graph.security.dynamicColumnValue",
    "Actor": [
      {
        "ID": "adminuser@example.onmicrosoft.com",
        "Type": 5
      },
      {
        "ID": "10000000AAAAAAAA",
        "Type": 3
      },
      {
        "ID": "User_11111111-1111-1111-1111-111111111111",
        "Type": 2
      },
      {
        "ID": "11111111-1111-1111-1111-111111111111",
        "Type": 2
      },
      {
        "ID": "User",
        "Type": 2
      },
      {
        "ID": "NotAgentic",
        "Type": 2
      }
    ],
    "Actor@odata.type": "#Collection(String)",
    "ActorContextId": "00000000-0000-0000-0000-000000000001",
    "AzureActiveDirectoryEventType": 1,
    "AzureActiveDirectoryEventType@odata.type": "#Int64",
    "CreationTime": "2026-07-25T21:49:08.0000000Z",
    "ExtendedProperties": [
      {
        "Name": "additionalDetails",
        "Value": {
          "User-Agent": "python/3.14.5 (Linux-6.1.0-51-amd64-x86_64-with-glibc2.36) AZURECLI/2.88.0 (DEB)",
          "AppId": "5165532d-c344-423b-973e-b4493d5450c5",
          "AppOwnerOrganizationId": "00000000-0000-0000-0000-000000000001",
          "ServicePrincipalProvisioningType": "Other"
        }
      },
      {
        "Name": "extendedAuditEventCategory",
        "Value": "ServicePrincipal"
      }
    ],
    "ExtendedProperties@odata.type": "#Collection(String)",
    "Id": "7943e2c0-acf1-4d0a-ab3f-ee682ed1d93e",
    "InterSystemsId": "d557c366-e388-4fdc-8160-62c183a4bba8",
    "IntraSystemId": "00000000-0000-0000-0000-000000000000",
    "ModifiedProperties": [
      {
        "Name": "AccountEnabled",
        "NewValue": [
          true
        ],
        "OldValue": []
      },
      {
        "Name": "AppPrincipalId",
        "NewValue": [
          "5165532d-c344-423b-973e-b4493d5450c5"
        ],
        "OldValue": []
      },
      {
        "Name": "DisplayName",
        "NewValue": [
          "dw-rt2-delegate"
        ],
        "OldValue": []
      },
      {
        "Name": "ServicePrincipalName",
        "NewValue": [
          "5165532d-c344-423b-973e-b4493d5450c5"
        ],
        "OldValue": []
      },
      {
        "Name": "Credential",
        "NewValue": [
          {
            "CredentialType": 2,
            "KeyStoreId": "291154f0-a9f5-45bb-87be-9c8ee5b6d62c",
            "KeyGroupId": "291154f0-a9f5-45bb-87be-9c8ee5b6d62c"
          }
        ],
        "OldValue": []
      },
      {
        "Name": "Included Updated Properties",
        "NewValue": "AccountEnabled, AppPrincipalId, DisplayName, ServicePrincipalName, Credential",
        "OldValue": ""
      }
    ],
    "ModifiedProperties@odata.type": "#Collection(String)",
    "ObjectId": "5165532d-c344-423b-973e-b4493d5450c5",
    "Operation": "Add service principal.",
    "OrganizationId": "00000000-0000-0000-0000-000000000001",
    "RecordType": 8,
    "RecordType@odata.type": "#Int64",
    "ResultStatus": "Success",
    "SupportTicketId": "",
    "Target": [
      {
        "ID": "ServicePrincipal_3ce33562-8f77-4735-afa3-eb60a90c3377",
        "Type": 2
      },
      {
        "ID": "3ce33562-8f77-4735-afa3-eb60a90c3377",
        "Type": 2
      },
      {
        "ID": "ServicePrincipal",
        "Type": 2
      },
      {
        "ID": "NotAgentic",
        "Type": 2
      },
      {
        "ID": "dw-rt2-delegate",
        "Type": 1
      },
      {
        "ID": "5165532d-c344-423b-973e-b4493d5450c5",
        "Type": 2
      },
      {
        "ID": "5165532d-c344-423b-973e-b4493d5450c5",
        "Type": 4
      },
      {
        "ID": "00000000-0000-0000-0000-000000000001",
        "Type": 2
      },
      {
        "ID": "Other",
        "Type": 2
      }
    ],
    "Target@odata.type": "#Collection(String)",
    "TargetContextId": "00000000-0000-0000-0000-000000000001",
    "UserId": "adminuser@example.onmicrosoft.com",
    "UserKey": "10000000AAAAAAAA@example.onmicrosoft.com",
    "UserType": 0,
    "UserType@odata.type": "#Int64",
    "Version": 1,
    "Version@odata.type": "#Int64",
    "Workload": "AzureActiveDirectory"
  },
  "ReportId": "75768946_11161_7943e2c0-acf1-4d0a-ab3f-ee682ed1d93e",
  "Timestamp": "2026-07-25T21:49:08Z",
  "UncommonForUser@odata.type": "#Collection(String)",
  "UserAgent": "python/3.14.5 (Linux-6.1.0-51-amd64-x86_64-with-glibc2.36) AZURECLI/2.88.0 (DEB)"
}

Detection Patterns #

Exfiltration: Exfiltration Over Physical Medium

Defender-CloudAppEvents any: Cloud app activityORDefender-DeviceEvents UsbDriveMounted: USB drive mountedORDefender-DeviceFileEvents FileCreated: File createdORFileRenamed: File renamed

1 rule

Kusto

Mass Download & copy to USB device by single user (source)

Microsoft Security Research

Common Indicators #

Positive field/value combinations most frequently checked by detection rules targeting this event, derived from cross-vendor predicate analysis. This is separate from Fields accounting, which also includes exclusions and counts distinct attached rules.

Field	Kind	Value	Rules	Vendors
`Active` (kusto rule field)	eq	`true`	4 rules	kusto
`ValidUntil` (kusto rule field)	is_null		4 rules	kusto
`CloudAppEvents_TimeGenerated` (kusto rule field)	cross_field_compare	`ExpirationDateTime`	3 rules	kusto
`CloudAppEvents_TimeGenerated` (kusto rule field)	cross_field_compare	`ValidUntil`	3 rules	kusto
`ActionType` (kusto rule field)	eq	`UsbDriveMounted`	1 rule	kusto
`ActionType` (kusto rule field)	in	`ExecuteToolByGateway`	2 rules	kusto
`ActionType` (kusto rule field)	in	`ExecuteToolByMCPServer`	2 rules	kusto
`ActionType` (kusto rule field)	in	`ExecuteToolBySDK`	2 rules	kusto
`ActionType` (kusto rule field)	in	`InferenceCall`	2 rules	kusto
`ActionType` (kusto rule field)	in	`InvokeAgent`	2 rules	kusto
`ActionType` (kusto rule field)	in	`FileCreated`	1 rule	kusto
`Image` (kusto rule field)	is_not_null		2 rules	kusto
`User_Id` (kusto rule field)	is_not_null		2 rules	kusto
`User_Id` (kusto rule field)	regex_match	`^[a-zA-Z0-9_.+-]+@[a-zA-Z0-9-]+\.[a-zA-Z0-9-.]+$`	2 rules	kusto
`AccountObjectId` (kusto rule field)	is_not_null		1 rule	kusto