Mail.Read Permissions Granted to Application
Id | 2560515c-07d1-434e-87fb-ebe3af267760 |
Rulename | Mail.Read Permissions Granted to Application |
Description | This query look for applications that have been granted (Delegated or App/Role) permissions to Read Mail (Permissions field has Mail.Read) and subsequently has been consented to. This can help identify applications that have been abused to gain access to mailboxes. |
Severity | Medium |
Tactics | Persistence |
Techniques | T1098 |
Required data connectors | AzureActiveDirectory |
Kind | Scheduled |
Query frequency | 1d |
Query period | 1d |
Trigger threshold | 0 |
Trigger operator | gt |
Source Uri | https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Azure Active Directory/Analytic Rules/MailPermissionsAddedToApplication.yaml |
Version | 1.0.1 |
Arm template | 2560515c-07d1-434e-87fb-ebe3af267760.json |
AuditLogs
| where Category =~ "ApplicationManagement"
| where ActivityDisplayName has_any ("Add delegated permission grant","Add app role assignment to service principal")
| where Result =~ "success"
| where tostring(InitiatedBy.user.userPrincipalName) has "@" or tostring(InitiatedBy.app.displayName) has "@"
| extend props = parse_json(tostring(TargetResources[0].modifiedProperties))
| mv-expand props
| extend UserAgent = tostring(AdditionalDetails[0].value)
| extend InitiatingUser = tostring(parse_json(tostring(InitiatedBy.user)).userPrincipalName)
| extend UserIPAddress = tostring(parse_json(tostring(InitiatedBy.user)).ipAddress)
| extend DisplayName = tostring(props.displayName)
| extend Permissions = tostring(parse_json(tostring(props.newValue)))
| where Permissions has_any ("Mail.Read", "Mail.ReadWrite")
| extend PermissionsAddedTo = tostring(TargetResources[0].displayName)
| extend Type = tostring(TargetResources[0].type)
| project-away props
| join kind=leftouter(
AuditLogs
| where ActivityDisplayName has "Consent to application"
| extend AppName = tostring(TargetResources[0].displayName)
| extend AppId = tostring(TargetResources[0].id)
| project AppName, AppId, CorrelationId) on CorrelationId
| project-reorder TimeGenerated, OperationName, InitiatingUser, UserIPAddress, UserAgent, PermissionsAddedTo, Permissions, AppName, AppId, CorrelationId
| extend timestamp = TimeGenerated, AccountCustomEntity = InitiatingUser, IPCustomEntity = UserIPAddress
version: 1.0.1
status: Available
queryFrequency: 1d
requiredDataConnectors:
- connectorId: AzureActiveDirectory
dataTypes:
- AuditLogs
entityMappings:
- fieldMappings:
- columnName: AccountCustomEntity
identifier: FullName
entityType: Account
- fieldMappings:
- columnName: IPCustomEntity
identifier: Address
entityType: IP
kind: Scheduled
queryPeriod: 1d
severity: Medium
query: |
AuditLogs
| where Category =~ "ApplicationManagement"
| where ActivityDisplayName has_any ("Add delegated permission grant","Add app role assignment to service principal")
| where Result =~ "success"
| where tostring(InitiatedBy.user.userPrincipalName) has "@" or tostring(InitiatedBy.app.displayName) has "@"
| extend props = parse_json(tostring(TargetResources[0].modifiedProperties))
| mv-expand props
| extend UserAgent = tostring(AdditionalDetails[0].value)
| extend InitiatingUser = tostring(parse_json(tostring(InitiatedBy.user)).userPrincipalName)
| extend UserIPAddress = tostring(parse_json(tostring(InitiatedBy.user)).ipAddress)
| extend DisplayName = tostring(props.displayName)
| extend Permissions = tostring(parse_json(tostring(props.newValue)))
| where Permissions has_any ("Mail.Read", "Mail.ReadWrite")
| extend PermissionsAddedTo = tostring(TargetResources[0].displayName)
| extend Type = tostring(TargetResources[0].type)
| project-away props
| join kind=leftouter(
AuditLogs
| where ActivityDisplayName has "Consent to application"
| extend AppName = tostring(TargetResources[0].displayName)
| extend AppId = tostring(TargetResources[0].id)
| project AppName, AppId, CorrelationId) on CorrelationId
| project-reorder TimeGenerated, OperationName, InitiatingUser, UserIPAddress, UserAgent, PermissionsAddedTo, Permissions, AppName, AppId, CorrelationId
| extend timestamp = TimeGenerated, AccountCustomEntity = InitiatingUser, IPCustomEntity = UserIPAddress
tags:
- Solorigate
- NOBELIUM
triggerOperator: gt
id: 2560515c-07d1-434e-87fb-ebe3af267760
description: |
'This query look for applications that have been granted (Delegated or App/Role) permissions to Read Mail (Permissions field has Mail.Read) and subsequently has been consented to. This can help identify applications that have been abused to gain access to mailboxes.'
triggerThreshold: 0
name: Mail.Read Permissions Granted to Application
relevantTechniques:
- T1098
tactics:
- Persistence
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Azure Active Directory/Analytic Rules/MailPermissionsAddedToApplication.yaml
{
"$schema": "https://schema.management.azure.com/schemas/2019-04-01/deploymentTemplate.json#",
"contentVersion": "1.0.0.0",
"parameters": {
"workspace": {
"type": "String"
}
},
"resources": [
{
"id": "[concat(resourceId('Microsoft.OperationalInsights/workspaces/providers', parameters('workspace'), 'Microsoft.SecurityInsights'),'/alertRules/2560515c-07d1-434e-87fb-ebe3af267760')]",
"name": "[concat(parameters('workspace'),'/Microsoft.SecurityInsights/2560515c-07d1-434e-87fb-ebe3af267760')]",
"type": "Microsoft.OperationalInsights/workspaces/providers/alertRules",
"kind": "Scheduled",
"apiVersion": "2022-11-01",
"properties": {
"displayName": "Mail.Read Permissions Granted to Application",
"description": "'This query look for applications that have been granted (Delegated or App/Role) permissions to Read Mail (Permissions field has Mail.Read) and subsequently has been consented to. This can help identify applications that have been abused to gain access to mailboxes.'\n",
"severity": "Medium",
"enabled": true,
"query": "AuditLogs\n| where Category =~ \"ApplicationManagement\"\n| where ActivityDisplayName has_any (\"Add delegated permission grant\",\"Add app role assignment to service principal\")\n| where Result =~ \"success\"\n| where tostring(InitiatedBy.user.userPrincipalName) has \"@\" or tostring(InitiatedBy.app.displayName) has \"@\"\n| extend props = parse_json(tostring(TargetResources[0].modifiedProperties))\n| mv-expand props\n| extend UserAgent = tostring(AdditionalDetails[0].value)\n| extend InitiatingUser = tostring(parse_json(tostring(InitiatedBy.user)).userPrincipalName)\n| extend UserIPAddress = tostring(parse_json(tostring(InitiatedBy.user)).ipAddress)\n| extend DisplayName = tostring(props.displayName)\n| extend Permissions = tostring(parse_json(tostring(props.newValue)))\n| where Permissions has_any (\"Mail.Read\", \"Mail.ReadWrite\")\n| extend PermissionsAddedTo = tostring(TargetResources[0].displayName)\n| extend Type = tostring(TargetResources[0].type)\n| project-away props\n| join kind=leftouter(\n AuditLogs\n | where ActivityDisplayName has \"Consent to application\"\n | extend AppName = tostring(TargetResources[0].displayName)\n | extend AppId = tostring(TargetResources[0].id)\n | project AppName, AppId, CorrelationId) on CorrelationId\n| project-reorder TimeGenerated, OperationName, InitiatingUser, UserIPAddress, UserAgent, PermissionsAddedTo, Permissions, AppName, AppId, CorrelationId\n| extend timestamp = TimeGenerated, AccountCustomEntity = InitiatingUser, IPCustomEntity = UserIPAddress\n",
"queryFrequency": "P1D",
"queryPeriod": "P1D",
"triggerOperator": "GreaterThan",
"triggerThreshold": 0,
"suppressionDuration": "PT1H",
"suppressionEnabled": false,
"tactics": [
"Persistence"
],
"techniques": [
"T1098"
],
"alertRuleTemplateName": "2560515c-07d1-434e-87fb-ebe3af267760",
"customDetails": null,
"entityMappings": [
{
"entityType": "Account",
"fieldMappings": [
{
"identifier": "FullName",
"columnName": "AccountCustomEntity"
}
]
},
{
"entityType": "IP",
"fieldMappings": [
{
"identifier": "Address",
"columnName": "IPCustomEntity"
}
]
}
],
"tags": [
"Solorigate",
"NOBELIUM"
],
"status": "Available",
"OriginalUri": "https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Azure Active Directory/Analytic Rules/MailPermissionsAddedToApplication.yaml",
"templateVersion": "1.0.1"
}
}
]
}