Cross-tenant Access Settings Organization Inbound Collaboration Settings Changed
Id | c895c5b9-0fc6-40ce-9830-e8818862f2d5 |
Rulename | Cross-tenant Access Settings Organization Inbound Collaboration Settings Changed |
Description | Organizations are added in the Cross-tenant Access Settings to control communication inbound or outbound for users and applications. This detection notifies when Organization Inbound Collaboration Settings are changed for “Users & Groups” and for “Applications”. |
Severity | Medium |
Tactics | InitialAccess Persistence Discovery |
Techniques | T1078.004 T1136.003 T1087.004 |
Required data connectors | AzureActiveDirectory |
Kind | Scheduled |
Query frequency | 2d |
Query period | 2d |
Trigger threshold | 0 |
Trigger operator | gt |
Source Uri | https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Microsoft Entra ID/Analytic Rules/Cross-tenantAccessSettingsOrganizationInboundCollaborationSettingsChanged.yaml |
Version | 1.1.1 |
Arm template | c895c5b9-0fc6-40ce-9830-e8818862f2d5.json |
// In User & Groups and in Applications, the following "AccessType" values in columns PremodifiedInboundSettings and ModifiedInboundSettings are interpreted accordingly
// When Access Type in premodified inbound settings value was 1 that means that the initial access was allowed. When Access Type in premodified inbound settings value was 2 that means that the initial access was blocked.
// When Access Type in modified inbound settings value is 1 that means that now access is allowed. When Access Type in modified inbound settings value is 2 that means that now access is blocked.
AuditLogs
| where OperationName has "Update a partner cross-tenant access setting"
| mv-apply TargetResource = TargetResources on
(
where TargetResource.type =~ "Policy"
| extend Properties = TargetResource.modifiedProperties
)
| mv-apply Property = Properties on
(
where Property.displayName =~ "b2bCollaborationInbound"
| extend PremodifiedInboundSettings = trim('"',tostring(Property.oldValue)),
ModifiedInboundSettings = trim(@'"',tostring(Property.newValue))
)
| where PremodifiedInboundSettings != ModifiedInboundSettings
| extend InitiatingAppName = tostring(InitiatedBy.app.displayName)
| extend InitiatingAppServicePrincipalId = tostring(InitiatedBy.app.servicePrincipalId)
| extend InitiatingUserPrincipalName = tostring(InitiatedBy.user.userPrincipalName)
| extend InitiatingAadUserId = tostring(InitiatedBy.user.id)
| extend InitiatingIpAddress = tostring(iff(isnotempty(InitiatedBy.user.ipAddress), InitiatedBy.user.ipAddress, InitiatedBy.app.ipAddress))
| extend InitiatingAccountName = tostring(split(InitiatingUserPrincipalName, "@")[0]), InitiatingAccountUPNSuffix = tostring(split(InitiatingUserPrincipalName, "@")[1])
severity: Medium
id: c895c5b9-0fc6-40ce-9830-e8818862f2d5
queryFrequency: 2d
queryPeriod: 2d
relevantTechniques:
- T1078.004
- T1136.003
- T1087.004
triggerOperator: gt
status: Available
tactics:
- InitialAccess
- Persistence
- Discovery
kind: Scheduled
description: |
'Organizations are added in the Cross-tenant Access Settings to control communication inbound or outbound for users and applications. This detection notifies when Organization Inbound Collaboration Settings are changed for "Users & Groups" and for "Applications".'
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Microsoft Entra ID/Analytic Rules/Cross-tenantAccessSettingsOrganizationInboundCollaborationSettingsChanged.yaml
requiredDataConnectors:
- dataTypes:
- AuditLogs
connectorId: AzureActiveDirectory
entityMappings:
- entityType: Account
fieldMappings:
- columnName: InitiatingAppName
identifier: Name
- columnName: InitiatingAppServicePrincipalId
identifier: AadUserId
- entityType: Account
fieldMappings:
- columnName: InitiatingUserPrincipalName
identifier: FullName
- columnName: InitiatingAccountName
identifier: Name
- columnName: InitiatingAccountUPNSuffix
identifier: UPNSuffix
- entityType: Account
fieldMappings:
- columnName: InitiatingAadUserId
identifier: AadUserId
- entityType: IP
fieldMappings:
- columnName: InitiatingIpAddress
identifier: Address
query: |
// In User & Groups and in Applications, the following "AccessType" values in columns PremodifiedInboundSettings and ModifiedInboundSettings are interpreted accordingly
// When Access Type in premodified inbound settings value was 1 that means that the initial access was allowed. When Access Type in premodified inbound settings value was 2 that means that the initial access was blocked.
// When Access Type in modified inbound settings value is 1 that means that now access is allowed. When Access Type in modified inbound settings value is 2 that means that now access is blocked.
AuditLogs
| where OperationName has "Update a partner cross-tenant access setting"
| mv-apply TargetResource = TargetResources on
(
where TargetResource.type =~ "Policy"
| extend Properties = TargetResource.modifiedProperties
)
| mv-apply Property = Properties on
(
where Property.displayName =~ "b2bCollaborationInbound"
| extend PremodifiedInboundSettings = trim('"',tostring(Property.oldValue)),
ModifiedInboundSettings = trim(@'"',tostring(Property.newValue))
)
| where PremodifiedInboundSettings != ModifiedInboundSettings
| extend InitiatingAppName = tostring(InitiatedBy.app.displayName)
| extend InitiatingAppServicePrincipalId = tostring(InitiatedBy.app.servicePrincipalId)
| extend InitiatingUserPrincipalName = tostring(InitiatedBy.user.userPrincipalName)
| extend InitiatingAadUserId = tostring(InitiatedBy.user.id)
| extend InitiatingIpAddress = tostring(iff(isnotempty(InitiatedBy.user.ipAddress), InitiatedBy.user.ipAddress, InitiatedBy.app.ipAddress))
| extend InitiatingAccountName = tostring(split(InitiatingUserPrincipalName, "@")[0]), InitiatingAccountUPNSuffix = tostring(split(InitiatingUserPrincipalName, "@")[1])
version: 1.1.1
name: Cross-tenant Access Settings Organization Inbound Collaboration Settings Changed
triggerThreshold: 0
{
"$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/c895c5b9-0fc6-40ce-9830-e8818862f2d5')]",
"kind": "Scheduled",
"name": "[concat(parameters('workspace'),'/Microsoft.SecurityInsights/c895c5b9-0fc6-40ce-9830-e8818862f2d5')]",
"properties": {
"alertRuleTemplateName": "c895c5b9-0fc6-40ce-9830-e8818862f2d5",
"customDetails": null,
"description": "'Organizations are added in the Cross-tenant Access Settings to control communication inbound or outbound for users and applications. This detection notifies when Organization Inbound Collaboration Settings are changed for \"Users & Groups\" and for \"Applications\".'\n",
"displayName": "Cross-tenant Access Settings Organization Inbound Collaboration Settings Changed",
"enabled": true,
"entityMappings": [
{
"entityType": "Account",
"fieldMappings": [
{
"columnName": "InitiatingAppName",
"identifier": "Name"
},
{
"columnName": "InitiatingAppServicePrincipalId",
"identifier": "AadUserId"
}
]
},
{
"entityType": "Account",
"fieldMappings": [
{
"columnName": "InitiatingUserPrincipalName",
"identifier": "FullName"
},
{
"columnName": "InitiatingAccountName",
"identifier": "Name"
},
{
"columnName": "InitiatingAccountUPNSuffix",
"identifier": "UPNSuffix"
}
]
},
{
"entityType": "Account",
"fieldMappings": [
{
"columnName": "InitiatingAadUserId",
"identifier": "AadUserId"
}
]
},
{
"entityType": "IP",
"fieldMappings": [
{
"columnName": "InitiatingIpAddress",
"identifier": "Address"
}
]
}
],
"OriginalUri": "https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Microsoft Entra ID/Analytic Rules/Cross-tenantAccessSettingsOrganizationInboundCollaborationSettingsChanged.yaml",
"query": "// In User & Groups and in Applications, the following \"AccessType\" values in columns PremodifiedInboundSettings and ModifiedInboundSettings are interpreted accordingly\n// When Access Type in premodified inbound settings value was 1 that means that the initial access was allowed. When Access Type in premodified inbound settings value was 2 that means that the initial access was blocked.\n// When Access Type in modified inbound settings value is 1 that means that now access is allowed. When Access Type in modified inbound settings value is 2 that means that now access is blocked.\nAuditLogs\n| where OperationName has \"Update a partner cross-tenant access setting\"\n| mv-apply TargetResource = TargetResources on\n (\n where TargetResource.type =~ \"Policy\"\n | extend Properties = TargetResource.modifiedProperties\n )\n| mv-apply Property = Properties on\n (\n where Property.displayName =~ \"b2bCollaborationInbound\"\n | extend PremodifiedInboundSettings = trim('\"',tostring(Property.oldValue)),\n ModifiedInboundSettings = trim(@'\"',tostring(Property.newValue))\n )\n| where PremodifiedInboundSettings != ModifiedInboundSettings\n| extend InitiatingAppName = tostring(InitiatedBy.app.displayName)\n| extend InitiatingAppServicePrincipalId = tostring(InitiatedBy.app.servicePrincipalId)\n| extend InitiatingUserPrincipalName = tostring(InitiatedBy.user.userPrincipalName)\n| extend InitiatingAadUserId = tostring(InitiatedBy.user.id)\n| extend InitiatingIpAddress = tostring(iff(isnotempty(InitiatedBy.user.ipAddress), InitiatedBy.user.ipAddress, InitiatedBy.app.ipAddress))\n| extend InitiatingAccountName = tostring(split(InitiatingUserPrincipalName, \"@\")[0]), InitiatingAccountUPNSuffix = tostring(split(InitiatingUserPrincipalName, \"@\")[1])\n",
"queryFrequency": "P2D",
"queryPeriod": "P2D",
"severity": "Medium",
"status": "Available",
"subTechniques": [
"T1078.004",
"T1136.003",
"T1087.004"
],
"suppressionDuration": "PT1H",
"suppressionEnabled": false,
"tactics": [
"Discovery",
"InitialAccess",
"Persistence"
],
"techniques": [
"T1078",
"T1087",
"T1136"
],
"templateVersion": "1.1.1",
"triggerOperator": "GreaterThan",
"triggerThreshold": 0
},
"type": "Microsoft.OperationalInsights/workspaces/providers/alertRules"
}
]
}