Analytic rule catalog
PROD TM0011 - GROUP - Added to Group Outside the Object Tier Level
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| Id | b300c7f8-dc5e-4fc6-879b-63f0013358ce |
| Rulename | PROD (TM001.1) - GROUP - Added to Group Outside the Object Tier Level |
| Description | Added an object to a member of a Tier Model group that is outside of the same Tier. Example a Tier 0 user added to a Tier 1 group. |
| Severity | High |
| Tactics | PrivilegeEscalation |
| Techniques | T1078.002 |
| Required data connectors | SecurityEvents WindowsSecurityEvents |
| Kind | Scheduled |
| Query frequency | 5m |
| Query period | 5m |
| Trigger threshold | 0 |
| Trigger operator | gt |
| Source Uri | https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Microsoft%20Active%20Directory%20Tier%20Model/Analytic%20Rules/TM001_GROUPAddedToGroupOutsideTheObjectTierLevel.yaml |
| Version | 1.0.0 |
| Arm template | b300c7f8-dc5e-4fc6-879b-63f0013358ce.json |
SecurityEvent
| where EventID == 5136
and Activity has "modified"
and (EventData matches regex @"(?i)OU=Tier 0 Accounts"
or EventData matches regex @"(?i)OU=Tier 1 Accounts"
or EventData matches regex @"(?i)OU=Tier 2 Accounts"
or EventData matches regex @"(?i)OU=Tier 0 Service Accounts"
or EventData matches regex @"(?i)OU=Tier 1 Service Accounts"
or EventData matches regex @"(?i)OU=Tier 2 Service Accounts"
or EventData matches regex @"(?i)OU=Tier 0 Groups"
or EventData matches regex @"(?i)OU=Tier 1 Groups"
or EventData matches regex @"(?i)OU=Tier 2 Groups"
or EventData matches regex @"(?i)OU=Tier 0 PAW"
or EventData matches regex @"(?i)OU=Tier 1 PAW"
or EventData matches regex @"(?i)OU=Tier 2 PAW")
and EventData has '"AttributeLDAPDisplayName">member'
and EventData has 'OperationType">%%14674'
| extend GroupName_e = extract("<Data Name=\"ObjectDN\">([^<]+)</Data>", 1, EventData)
| extend GroupName = extract("(?i)CN=([^,]+)", 1, GroupName_e)
| where GroupName != "Protected Users"
| where GroupName != "Allowed RODC Password Replication Group"
| extend GroupTier_e = extract("<Data Name=\"ObjectDN\">([^<]+)</Data>", 1, EventData)
| extend GroupTier = extract("(?i)OU=(Tier [^ ]+)", 1, GroupTier_e)
| extend GroupTier = iff(isempty(GroupTier), "Outside Tier Model", GroupTier)
| extend ObjectName_e = extract("<Data Name=\"AttributeValue\">([^<]+)</Data>", 1, EventData)
| extend ObjectName = extract("(?i)CN=([^,]+)", 1, ObjectName_e)
| extend ObjectTier_e = extract("<Data Name=\"AttributeValue\">([^<]+)</Data>", 1, EventData)
| extend ObjectTier = extract("(?i)OU=(Tier [^ ]+)", 1, ObjectTier_e)
| extend ObjectTier = iff(isempty(ObjectTier), "Outside Tier Model", ObjectTier)
| extend Domain = extract("([^.]+\\.[^.]+)$", 1, Computer)
| extend ActivityType = extract("([a-zA-Z]+)\\.$", 1, Activity)
| extend OperationType = iff(EventData has 'OperationType">%%14674', "Added", tostring(OperationType))
| where GroupTier != ObjectTier
| project TimeGenerated
, ObjectName
, ObjectTier
, ObjectType = AccountType
, GroupName
, GroupTier
, ActivityType
, OperationType
, Account
, Domain
, Computer
, Channel
, EventID
, EventData
relevantTechniques:
- T1078.002
triggerThreshold: 0
id: b300c7f8-dc5e-4fc6-879b-63f0013358ce
eventGroupingSettings:
aggregationKind: AlertPerResult
alertDetailsOverride:
alertDisplayNameFormat: (TM001.1) A {{ObjectTier}} object was added to non-{{ObjectTier}} group {{GroupName}}
alertDescriptionFormat: |
Tier Model Alert TM001 - A {{ObjectTier}} object was added to non-{{ObjectTier}} group {{GroupName}}.
Resolution - Remove the object from the group
queryPeriod: 5m
triggerOperator: gt
incidentConfiguration:
createIncident: true
groupingConfiguration:
enabled: false
reopenClosedIncident: false
matchingMethod: Selected
groupByCustomDetails:
- ObjectName
groupByEntities:
- Account
lookbackDuration: PT5M
status: Available
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Microsoft%20Active%20Directory%20Tier%20Model/Analytic%20Rules/TM001_GROUPAddedToGroupOutsideTheObjectTierLevel.yaml
queryFrequency: 5m
requiredDataConnectors:
- dataTypes:
- SecurityEvent
connectorId: SecurityEvents
- dataTypes:
- SecurityEvent
connectorId: WindowsSecurityEvents
version: 1.0.0
tactics:
- PrivilegeEscalation
query: |
SecurityEvent
| where EventID == 5136
and Activity has "modified"
and (EventData matches regex @"(?i)OU=Tier 0 Accounts"
or EventData matches regex @"(?i)OU=Tier 1 Accounts"
or EventData matches regex @"(?i)OU=Tier 2 Accounts"
or EventData matches regex @"(?i)OU=Tier 0 Service Accounts"
or EventData matches regex @"(?i)OU=Tier 1 Service Accounts"
or EventData matches regex @"(?i)OU=Tier 2 Service Accounts"
or EventData matches regex @"(?i)OU=Tier 0 Groups"
or EventData matches regex @"(?i)OU=Tier 1 Groups"
or EventData matches regex @"(?i)OU=Tier 2 Groups"
or EventData matches regex @"(?i)OU=Tier 0 PAW"
or EventData matches regex @"(?i)OU=Tier 1 PAW"
or EventData matches regex @"(?i)OU=Tier 2 PAW")
and EventData has '"AttributeLDAPDisplayName">member'
and EventData has 'OperationType">%%14674'
| extend GroupName_e = extract("<Data Name=\"ObjectDN\">([^<]+)</Data>", 1, EventData)
| extend GroupName = extract("(?i)CN=([^,]+)", 1, GroupName_e)
| where GroupName != "Protected Users"
| where GroupName != "Allowed RODC Password Replication Group"
| extend GroupTier_e = extract("<Data Name=\"ObjectDN\">([^<]+)</Data>", 1, EventData)
| extend GroupTier = extract("(?i)OU=(Tier [^ ]+)", 1, GroupTier_e)
| extend GroupTier = iff(isempty(GroupTier), "Outside Tier Model", GroupTier)
| extend ObjectName_e = extract("<Data Name=\"AttributeValue\">([^<]+)</Data>", 1, EventData)
| extend ObjectName = extract("(?i)CN=([^,]+)", 1, ObjectName_e)
| extend ObjectTier_e = extract("<Data Name=\"AttributeValue\">([^<]+)</Data>", 1, EventData)
| extend ObjectTier = extract("(?i)OU=(Tier [^ ]+)", 1, ObjectTier_e)
| extend ObjectTier = iff(isempty(ObjectTier), "Outside Tier Model", ObjectTier)
| extend Domain = extract("([^.]+\\.[^.]+)$", 1, Computer)
| extend ActivityType = extract("([a-zA-Z]+)\\.$", 1, Activity)
| extend OperationType = iff(EventData has 'OperationType">%%14674', "Added", tostring(OperationType))
| where GroupTier != ObjectTier
| project TimeGenerated
, ObjectName
, ObjectTier
, ObjectType = AccountType
, GroupName
, GroupTier
, ActivityType
, OperationType
, Account
, Domain
, Computer
, Channel
, EventID
, EventData
name: PROD (TM001.1) - GROUP - Added to Group Outside the Object Tier Level
severity: High
entityMappings:
- entityType: Account
fieldMappings:
- identifier: FullName
columnName: ObjectName
- entityType: SecurityGroup
fieldMappings:
- identifier: DistinguishedName
columnName: GroupName
- entityType: Account
fieldMappings:
- identifier: FullName
columnName: Account
- entityType: Host
fieldMappings:
- identifier: HostName
columnName: Computer
customDetails:
Domain: Domain
ActivityType: ActivityType
OperationType: OperationType
ObjectTier: ObjectTier
EventID: EventID
ObjectType: ObjectType
ObjectName: ObjectName
GroupName: GroupName
Account: Account
Channel: Channel
EventData: EventData
GroupTier: GroupTier
description: |
Added an object to a member of a Tier Model group that is outside of the same Tier. Example a Tier 0 user added to a Tier 1 group.
kind: Scheduled
{
"$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/b300c7f8-dc5e-4fc6-879b-63f0013358ce')]",
"kind": "Scheduled",
"name": "[concat(parameters('workspace'),'/Microsoft.SecurityInsights/b300c7f8-dc5e-4fc6-879b-63f0013358ce')]",
"properties": {
"alertDetailsOverride": {
"alertDescriptionFormat": "Tier Model Alert TM001 - A {{ObjectTier}} object was added to non-{{ObjectTier}} group {{GroupName}}.\n\nResolution - Remove the object from the group\n",
"alertDisplayNameFormat": "(TM001.1) A {{ObjectTier}} object was added to non-{{ObjectTier}} group {{GroupName}}"
},
"alertRuleTemplateName": "b300c7f8-dc5e-4fc6-879b-63f0013358ce",
"customDetails": {
"Account": "Account",
"ActivityType": "ActivityType",
"Channel": "Channel",
"Domain": "Domain",
"EventData": "EventData",
"EventID": "EventID",
"GroupName": "GroupName",
"GroupTier": "GroupTier",
"ObjectName": "ObjectName",
"ObjectTier": "ObjectTier",
"ObjectType": "ObjectType",
"OperationType": "OperationType"
},
"description": "Added an object to a member of a Tier Model group that is outside of the same Tier. Example a Tier 0 user added to a Tier 1 group.\n",
"displayName": "PROD (TM001.1) - GROUP - Added to Group Outside the Object Tier Level",
"enabled": true,
"entityMappings": [
{
"entityType": "Account",
"fieldMappings": [
{
"columnName": "ObjectName",
"identifier": "FullName"
}
]
},
{
"entityType": "SecurityGroup",
"fieldMappings": [
{
"columnName": "GroupName",
"identifier": "DistinguishedName"
}
]
},
{
"entityType": "Account",
"fieldMappings": [
{
"columnName": "Account",
"identifier": "FullName"
}
]
},
{
"entityType": "Host",
"fieldMappings": [
{
"columnName": "Computer",
"identifier": "HostName"
}
]
}
],
"eventGroupingSettings": {
"aggregationKind": "AlertPerResult"
},
"incidentConfiguration": {
"createIncident": true,
"groupingConfiguration": {
"enabled": false,
"groupByCustomDetails": [
"ObjectName"
],
"groupByEntities": [
"Account"
],
"lookbackDuration": "PT5M",
"matchingMethod": "Selected",
"reopenClosedIncident": false
}
},
"OriginalUri": "https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Microsoft%20Active%20Directory%20Tier%20Model/Analytic%20Rules/TM001_GROUPAddedToGroupOutsideTheObjectTierLevel.yaml",
"query": "SecurityEvent \n| where EventID == 5136\n and Activity has \"modified\"\n and (EventData matches regex @\"(?i)OU=Tier 0 Accounts\" \n or EventData matches regex @\"(?i)OU=Tier 1 Accounts\" \n or EventData matches regex @\"(?i)OU=Tier 2 Accounts\"\n or EventData matches regex @\"(?i)OU=Tier 0 Service Accounts\" \n or EventData matches regex @\"(?i)OU=Tier 1 Service Accounts\" \n or EventData matches regex @\"(?i)OU=Tier 2 Service Accounts\"\n or EventData matches regex @\"(?i)OU=Tier 0 Groups\"\n or EventData matches regex @\"(?i)OU=Tier 1 Groups\"\n or EventData matches regex @\"(?i)OU=Tier 2 Groups\"\n or EventData matches regex @\"(?i)OU=Tier 0 PAW\"\n or EventData matches regex @\"(?i)OU=Tier 1 PAW\"\n or EventData matches regex @\"(?i)OU=Tier 2 PAW\")\n and EventData has '\"AttributeLDAPDisplayName\">member'\n and EventData has 'OperationType\">14674', \"Added\", tostring(OperationType))\n| where GroupTier != ObjectTier\n| project TimeGenerated \n , ObjectName\n , ObjectTier\n , ObjectType = AccountType\n , GroupName\n , GroupTier\n , ActivityType\n , OperationType\n , Account\n , Domain\n , Computer\n , Channel\n , EventID\n , EventData\n",
"queryFrequency": "PT5M",
"queryPeriod": "PT5M",
"severity": "High",
"status": "Available",
"subTechniques": [
"T1078.002"
],
"suppressionDuration": "PT1H",
"suppressionEnabled": false,
"tactics": [
"PrivilegeEscalation"
],
"techniques": [
"T1078"
],
"templateVersion": "1.0.0",
"triggerOperator": "GreaterThan",
"triggerThreshold": 0
},
"type": "Microsoft.OperationalInsights/workspaces/providers/alertRules"
}
]
}