Authentication Methods Changed for Privileged Account
Id | 694c91ee-d606-4ba9-928e-405a2dd0ff0f |
Rulename | Authentication Methods Changed for Privileged Account |
Description | Identifies authentication methods being changed for a privileged account. This could be an indication of an attacker adding an auth method to the account so they can have continued access. Ref : https://docs.microsoft.com/azure/active-directory/fundamentals/security-operations-privileged-accounts#things-to-monitor-1 |
Severity | High |
Tactics | Persistence |
Techniques | T1098 |
Required data connectors | AzureActiveDirectory |
Kind | Scheduled |
Query frequency | 2h |
Query period | 14d |
Trigger threshold | 0 |
Trigger operator | gt |
Source Uri | https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Azure Active Directory/Analytic Rules/AuthenticationMethodsChangedforPrivilegedAccount.yaml |
Version | 1.0.8 |
Arm template | 694c91ee-d606-4ba9-928e-405a2dd0ff0f.json |
let queryperiod = 14d;
let queryfrequency = 2h;
let security_info_actions = dynamic(["User registered security info", "User changed default security info", "User deleted security info", "Admin updated security info", "User reviewed security info", "Admin deleted security info", "Admin registered security info"]);
let VIPUsers = (
IdentityInfo
| where TimeGenerated > ago(queryperiod)
| mv-expand AssignedRoles
| where AssignedRoles contains 'Admin'
| summarize by AccountUPN);
AuditLogs
| where TimeGenerated > ago(queryfrequency)
| where Category =~ "UserManagement"
| where ActivityDisplayName in (security_info_actions)
| extend Initiator = tostring(InitiatedBy.user.userPrincipalName)
| extend IP = tostring(InitiatedBy.user.ipAddress)
| mv-apply TargetResource = TargetResources on
(
where TargetResource.type =~ "User"
| extend Target = tostring(TargetResource.userPrincipalName)
)
| where Target in~ (VIPUsers)
// Uncomment the line below if you are experiencing high volumes of Target entities. If this is uncommented, the Target column will not be mapped to an entity.
//| summarize Start=min(TimeGenerated), End=max(TimeGenerated), Actions = make_set(ResultReason, MaxSize=8), Targets=make_set(Target, MaxSize=256) by Initiator, IP, Result
// Comment out this line below, if line above is used.
| summarize Start=min(TimeGenerated), End=max(TimeGenerated), Actions = make_set(ResultReason, MaxSize=8) by Initiator, IP, Result, Targets = Target
| extend InitiatorName = tostring(split(Initiator,'@',0)[0]),
InitiatorUPNSuffix = tostring(split(Initiator,'@',1)[0]),
TargetName = iff(tostring(Targets) has "[", "", tostring(split(Targets,'@',0)[0])),
TargetUPNSuffix = iff(tostring(Targets) has "[", "", tostring(split(Targets,'@',1)[0]))
requiredDataConnectors:
- connectorId: AzureActiveDirectory
dataTypes:
- AuditLogs
triggerOperator: gt
queryFrequency: 2h
name: Authentication Methods Changed for Privileged Account
tags:
- AADSecOpsGuide
queryPeriod: 14d
id: 694c91ee-d606-4ba9-928e-405a2dd0ff0f
description: |
'Identifies authentication methods being changed for a privileged account. This could be an indication of an attacker adding an auth method to the account so they can have continued access.
Ref : https://docs.microsoft.com/azure/active-directory/fundamentals/security-operations-privileged-accounts#things-to-monitor-1'
severity: High
query: |
let queryperiod = 14d;
let queryfrequency = 2h;
let security_info_actions = dynamic(["User registered security info", "User changed default security info", "User deleted security info", "Admin updated security info", "User reviewed security info", "Admin deleted security info", "Admin registered security info"]);
let VIPUsers = (
IdentityInfo
| where TimeGenerated > ago(queryperiod)
| mv-expand AssignedRoles
| where AssignedRoles contains 'Admin'
| summarize by AccountUPN);
AuditLogs
| where TimeGenerated > ago(queryfrequency)
| where Category =~ "UserManagement"
| where ActivityDisplayName in (security_info_actions)
| extend Initiator = tostring(InitiatedBy.user.userPrincipalName)
| extend IP = tostring(InitiatedBy.user.ipAddress)
| mv-apply TargetResource = TargetResources on
(
where TargetResource.type =~ "User"
| extend Target = tostring(TargetResource.userPrincipalName)
)
| where Target in~ (VIPUsers)
// Uncomment the line below if you are experiencing high volumes of Target entities. If this is uncommented, the Target column will not be mapped to an entity.
//| summarize Start=min(TimeGenerated), End=max(TimeGenerated), Actions = make_set(ResultReason, MaxSize=8), Targets=make_set(Target, MaxSize=256) by Initiator, IP, Result
// Comment out this line below, if line above is used.
| summarize Start=min(TimeGenerated), End=max(TimeGenerated), Actions = make_set(ResultReason, MaxSize=8) by Initiator, IP, Result, Targets = Target
| extend InitiatorName = tostring(split(Initiator,'@',0)[0]),
InitiatorUPNSuffix = tostring(split(Initiator,'@',1)[0]),
TargetName = iff(tostring(Targets) has "[", "", tostring(split(Targets,'@',0)[0])),
TargetUPNSuffix = iff(tostring(Targets) has "[", "", tostring(split(Targets,'@',1)[0]))
triggerThreshold: 0
version: 1.0.8
kind: Scheduled
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Azure Active Directory/Analytic Rules/AuthenticationMethodsChangedforPrivilegedAccount.yaml
entityMappings:
- entityType: Account
fieldMappings:
- identifier: Name
columnName: InitiatorName
- identifier: UPNSuffix
columnName: InitiatorUPNSuffix
- entityType: Account
fieldMappings:
- identifier: Name
columnName: TargetName
- identifier: UPNSuffix
columnName: TargetUPNSuffix
- entityType: IP
fieldMappings:
- identifier: Address
columnName: IP
relevantTechniques:
- T1098
tactics:
- Persistence
status: Available
{
"$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/694c91ee-d606-4ba9-928e-405a2dd0ff0f')]",
"name": "[concat(parameters('workspace'),'/Microsoft.SecurityInsights/694c91ee-d606-4ba9-928e-405a2dd0ff0f')]",
"type": "Microsoft.OperationalInsights/workspaces/providers/alertRules",
"kind": "Scheduled",
"apiVersion": "2022-11-01-preview",
"properties": {
"displayName": "Authentication Methods Changed for Privileged Account",
"description": "'Identifies authentication methods being changed for a privileged account. This could be an indication of an attacker adding an auth method to the account so they can have continued access.\nRef : https://docs.microsoft.com/azure/active-directory/fundamentals/security-operations-privileged-accounts#things-to-monitor-1'\n",
"severity": "High",
"enabled": true,
"query": "let queryperiod = 14d;\nlet queryfrequency = 2h;\nlet security_info_actions = dynamic([\"User registered security info\", \"User changed default security info\", \"User deleted security info\", \"Admin updated security info\", \"User reviewed security info\", \"Admin deleted security info\", \"Admin registered security info\"]);\nlet VIPUsers = (\n IdentityInfo\n | where TimeGenerated > ago(queryperiod)\n | mv-expand AssignedRoles\n | where AssignedRoles contains 'Admin'\n | summarize by AccountUPN);\nAuditLogs\n| where TimeGenerated > ago(queryfrequency)\n| where Category =~ \"UserManagement\"\n| where ActivityDisplayName in (security_info_actions)\n| extend Initiator = tostring(InitiatedBy.user.userPrincipalName)\n| extend IP = tostring(InitiatedBy.user.ipAddress)\n| mv-apply TargetResource = TargetResources on \n (\n where TargetResource.type =~ \"User\"\n | extend Target = tostring(TargetResource.userPrincipalName)\n )\n| where Target in~ (VIPUsers)\n// Uncomment the line below if you are experiencing high volumes of Target entities. If this is uncommented, the Target column will not be mapped to an entity.\n//| summarize Start=min(TimeGenerated), End=max(TimeGenerated), Actions = make_set(ResultReason, MaxSize=8), Targets=make_set(Target, MaxSize=256) by Initiator, IP, Result\n// Comment out this line below, if line above is used.\n| summarize Start=min(TimeGenerated), End=max(TimeGenerated), Actions = make_set(ResultReason, MaxSize=8) by Initiator, IP, Result, Targets = Target\n| extend InitiatorName = tostring(split(Initiator,'@',0)[0]), \n InitiatorUPNSuffix = tostring(split(Initiator,'@',1)[0]),\n TargetName = iff(tostring(Targets) has \"[\", \"\", tostring(split(Targets,'@',0)[0])), \n TargetUPNSuffix = iff(tostring(Targets) has \"[\", \"\", tostring(split(Targets,'@',1)[0]))\n",
"queryFrequency": "PT2H",
"queryPeriod": "P14D",
"triggerOperator": "GreaterThan",
"triggerThreshold": 0,
"suppressionDuration": "PT1H",
"suppressionEnabled": false,
"tactics": [
"Persistence"
],
"techniques": [
"T1098"
],
"alertRuleTemplateName": "694c91ee-d606-4ba9-928e-405a2dd0ff0f",
"customDetails": null,
"entityMappings": [
{
"fieldMappings": [
{
"identifier": "Name",
"columnName": "InitiatorName"
},
{
"identifier": "UPNSuffix",
"columnName": "InitiatorUPNSuffix"
}
],
"entityType": "Account"
},
{
"fieldMappings": [
{
"identifier": "Name",
"columnName": "TargetName"
},
{
"identifier": "UPNSuffix",
"columnName": "TargetUPNSuffix"
}
],
"entityType": "Account"
},
{
"fieldMappings": [
{
"identifier": "Address",
"columnName": "IP"
}
],
"entityType": "IP"
}
],
"status": "Available",
"tags": [
"AADSecOpsGuide"
],
"templateVersion": "1.0.8",
"OriginalUri": "https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Azure Active Directory/Analytic Rules/AuthenticationMethodsChangedforPrivilegedAccount.yaml"
}
}
]
}