Addition of a Temporary Access Pass to a Privileged Account
| Id | d7feb859-f03e-4e8d-8b21-617be0213b13 |
| Rulename | Addition of a Temporary Access Pass to a Privileged Account |
| Description | Detects when a Temporary Access Pass (TAP) is created for a Privileged Account. A Temporary Access Pass is a time-limited passcode issued by an admin that satisfies strong authentication requirements and can be used to onboard other authentication methods, including Passwordless ones such as Microsoft Authenticator or even Windows Hello. A threat actor could use a TAP to register a new authentication method to maintain persistance to an account. Review any TAP creations to ensure they were used legitimately. Ref: https://docs.microsoft.com/azure/active-directory/fundamentals/security-operations-privileged-accounts#changes-to-privileged-accounts |
| Severity | High |
| Tactics | Persistence |
| Techniques | T1078.004 |
| Required data connectors | AzureActiveDirectory BehaviorAnalytics |
| Kind | Scheduled |
| Query frequency | 1d |
| Query period | 1d |
| Trigger threshold | 0 |
| Trigger operator | gt |
| Source Uri | https://github.com/Azure/Azure-Sentinel/blob/master/Detections/AuditLogs/AdditionofaTemporaryAccessPasstoaPrivilegedAccount.yaml |
| Version | 1.0.4 |
| Arm template | d7feb859-f03e-4e8d-8b21-617be0213b13.json |
let admin_users = (IdentityInfo
| summarize arg_max(TimeGenerated, *) by AccountUPN
| where AssignedRoles contains "admin"
| summarize by tolower(AccountUPN));
AuditLogs
| where OperationName =~ "Admin registered security info"
| where ResultReason =~ "Admin registered temporary access pass method for user"
| extend TargetUserPrincipalName = tostring(TargetResources[0].userPrincipalName)
| where tolower(TargetUserPrincipalName) in (admin_users)
| extend TargetAadUserId = tostring(TargetResources[0].id)
| extend InitiatingUserPrincipalName = tostring(InitiatedBy.user.userPrincipalName)
| extend InitiatingAadUserId = tostring(InitiatedBy.user.id)
| extend InitiatingIPAddress = tostring(InitiatedBy.user.ipAddress)
| extend TargetAccountName = tostring(split(TargetUserPrincipalName, "@")[0]), TargetAccountUPNSuffix = tostring(split(TargetUserPrincipalName, "@")[1])
| extend InitiatingAccountName = tostring(split(InitiatingUserPrincipalName, "@")[0]), InitiatingAccountUPNSuffix = tostring(split(InitiatingUserPrincipalName, "@")[1])
triggerOperator: gt
queryFrequency: 1d
description: |
'Detects when a Temporary Access Pass (TAP) is created for a Privileged Account.
A Temporary Access Pass is a time-limited passcode issued by an admin that satisfies strong authentication requirements and can be used to onboard other authentication methods, including Passwordless ones such as Microsoft Authenticator or even Windows Hello.
A threat actor could use a TAP to register a new authentication method to maintain persistance to an account.
Review any TAP creations to ensure they were used legitimately.
Ref: https://docs.microsoft.com/azure/active-directory/fundamentals/security-operations-privileged-accounts#changes-to-privileged-accounts'
version: 1.0.4
kind: Scheduled
triggerThreshold: 0
requiredDataConnectors:
- connectorId: AzureActiveDirectory
dataTypes:
- AuditLogs
- connectorId: BehaviorAnalytics
dataTypes:
- IdentityInfo
queryPeriod: 1d
name: Addition of a Temporary Access Pass to a Privileged Account
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Detections/AuditLogs/AdditionofaTemporaryAccessPasstoaPrivilegedAccount.yaml
id: d7feb859-f03e-4e8d-8b21-617be0213b13
tags:
- AADSecOpsGuide
tactics:
- Persistence
metadata:
source:
kind: Community
author:
name: Microsoft Security Research
categories:
domains:
- Security - Threat Protection
- Identity
support:
tier: Community
relevantTechniques:
- T1078.004
severity: High
entityMappings:
- fieldMappings:
- identifier: FullName
columnName: TargetUserPrincipalName
- identifier: Name
columnName: TargetAccountName
- identifier: UPNSuffix
columnName: TargetAccountUPNSuffix
entityType: Account
- fieldMappings:
- identifier: FullName
columnName: InitiatingUserPrincipalName
- identifier: Name
columnName: InitiatingAccountName
- identifier: UPNSuffix
columnName: InitiatingAccountUPNSuffix
entityType: Account
- fieldMappings:
- identifier: AadUserId
columnName: TargetAadUserId
entityType: Account
- fieldMappings:
- identifier: AadUserId
columnName: InitiatingAadUserId
entityType: Account
- fieldMappings:
- identifier: Address
columnName: InitiatingIPAddress
entityType: IP
query: |
let admin_users = (IdentityInfo
| summarize arg_max(TimeGenerated, *) by AccountUPN
| where AssignedRoles contains "admin"
| summarize by tolower(AccountUPN));
AuditLogs
| where OperationName =~ "Admin registered security info"
| where ResultReason =~ "Admin registered temporary access pass method for user"
| extend TargetUserPrincipalName = tostring(TargetResources[0].userPrincipalName)
| where tolower(TargetUserPrincipalName) in (admin_users)
| extend TargetAadUserId = tostring(TargetResources[0].id)
| extend InitiatingUserPrincipalName = tostring(InitiatedBy.user.userPrincipalName)
| extend InitiatingAadUserId = tostring(InitiatedBy.user.id)
| extend InitiatingIPAddress = tostring(InitiatedBy.user.ipAddress)
| extend TargetAccountName = tostring(split(TargetUserPrincipalName, "@")[0]), TargetAccountUPNSuffix = tostring(split(TargetUserPrincipalName, "@")[1])
| extend InitiatingAccountName = tostring(split(InitiatingUserPrincipalName, "@")[0]), InitiatingAccountUPNSuffix = tostring(split(InitiatingUserPrincipalName, "@")[1])
{
"$schema": "https://schema.management.azure.com/schemas/2019-04-01/deploymentTemplate.json#",
"contentVersion": "1.0.0.0",
"parameters": {
"workspace": {
"type": "String"
}
},
"resources": [
{
"apiVersion": "2023-02-01-preview",
"id": "[concat(resourceId('Microsoft.OperationalInsights/workspaces/providers', parameters('workspace'), 'Microsoft.SecurityInsights'),'/alertRules/d7feb859-f03e-4e8d-8b21-617be0213b13')]",
"kind": "Scheduled",
"name": "[concat(parameters('workspace'),'/Microsoft.SecurityInsights/d7feb859-f03e-4e8d-8b21-617be0213b13')]",
"properties": {
"alertRuleTemplateName": "d7feb859-f03e-4e8d-8b21-617be0213b13",
"customDetails": null,
"description": "'Detects when a Temporary Access Pass (TAP) is created for a Privileged Account.\n A Temporary Access Pass is a time-limited passcode issued by an admin that satisfies strong authentication requirements and can be used to onboard other authentication methods, including Passwordless ones such as Microsoft Authenticator or even Windows Hello.\n A threat actor could use a TAP to register a new authentication method to maintain persistance to an account.\n Review any TAP creations to ensure they were used legitimately.\n Ref: https://docs.microsoft.com/azure/active-directory/fundamentals/security-operations-privileged-accounts#changes-to-privileged-accounts'\n",
"displayName": "Addition of a Temporary Access Pass to a Privileged Account",
"enabled": true,
"entityMappings": [
{
"entityType": "Account",
"fieldMappings": [
{
"columnName": "TargetUserPrincipalName",
"identifier": "FullName"
},
{
"columnName": "TargetAccountName",
"identifier": "Name"
},
{
"columnName": "TargetAccountUPNSuffix",
"identifier": "UPNSuffix"
}
]
},
{
"entityType": "Account",
"fieldMappings": [
{
"columnName": "InitiatingUserPrincipalName",
"identifier": "FullName"
},
{
"columnName": "InitiatingAccountName",
"identifier": "Name"
},
{
"columnName": "InitiatingAccountUPNSuffix",
"identifier": "UPNSuffix"
}
]
},
{
"entityType": "Account",
"fieldMappings": [
{
"columnName": "TargetAadUserId",
"identifier": "AadUserId"
}
]
},
{
"entityType": "Account",
"fieldMappings": [
{
"columnName": "InitiatingAadUserId",
"identifier": "AadUserId"
}
]
},
{
"entityType": "IP",
"fieldMappings": [
{
"columnName": "InitiatingIPAddress",
"identifier": "Address"
}
]
}
],
"OriginalUri": "https://github.com/Azure/Azure-Sentinel/blob/master/Detections/AuditLogs/AdditionofaTemporaryAccessPasstoaPrivilegedAccount.yaml",
"query": "let admin_users = (IdentityInfo\n | summarize arg_max(TimeGenerated, *) by AccountUPN\n | where AssignedRoles contains \"admin\"\n | summarize by tolower(AccountUPN));\n AuditLogs\n | where OperationName =~ \"Admin registered security info\"\n | where ResultReason =~ \"Admin registered temporary access pass method for user\"\n | extend TargetUserPrincipalName = tostring(TargetResources[0].userPrincipalName)\n | where tolower(TargetUserPrincipalName) in (admin_users)\n | extend TargetAadUserId = tostring(TargetResources[0].id)\n | extend InitiatingUserPrincipalName = tostring(InitiatedBy.user.userPrincipalName)\n | extend InitiatingAadUserId = tostring(InitiatedBy.user.id)\n | extend InitiatingIPAddress = tostring(InitiatedBy.user.ipAddress)\n | extend TargetAccountName = tostring(split(TargetUserPrincipalName, \"@\")[0]), TargetAccountUPNSuffix = tostring(split(TargetUserPrincipalName, \"@\")[1])\n | extend InitiatingAccountName = tostring(split(InitiatingUserPrincipalName, \"@\")[0]), InitiatingAccountUPNSuffix = tostring(split(InitiatingUserPrincipalName, \"@\")[1])\n",
"queryFrequency": "P1D",
"queryPeriod": "P1D",
"severity": "High",
"suppressionDuration": "PT1H",
"suppressionEnabled": false,
"tactics": [
"Persistence"
],
"tags": [
"AADSecOpsGuide"
],
"techniques": [
"T1078"
],
"templateVersion": "1.0.4",
"triggerOperator": "GreaterThan",
"triggerThreshold": 0
},
"type": "Microsoft.OperationalInsights/workspaces/providers/alertRules"
}
]
}