Semperis DSP RBAC Changes
| Id | e5edf3f3-de53-45e6-b0d7-1ce1c048df4a |
| Rulename | Semperis DSP RBAC Changes |
| Description | Alerts when there are RBAC changes in the DSP system. |
| Severity | Medium |
| Tactics | PrivilegeEscalation Persistence |
| Techniques | T1548 T1098 |
| Required data connectors | SemperisDSP |
| Kind | Scheduled |
| Query frequency | 30m |
| Query period | 30m |
| Trigger threshold | 0 |
| Trigger operator | gt |
| Source Uri | https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Semperis Directory Services Protector/Analytic Rules/Semperis_DSP_RBAC_Changes.yaml |
| Version | 2.0.6 |
| Arm template | e5edf3f3-de53-45e6-b0d7-1ce1c048df4a.json |
SecurityEvent
| where EventSourceName == 'Semperis-Operation-Log' and EventID == 20012
| order by TimeGenerated desc
| extend p1Xml = parse_xml(EventData).DataItem.EventData.Data
| mv-expand bagexpansion=array p1Xml
| evaluate bag_unpack(p1Xml)
| extend Name=column_ifexists('@Name', ''), Value=column_ifexists('#text', '')
| evaluate pivot(Name, any(Value), TimeGenerated, Computer, Level, EventLevelName, EventID, Type, _ResourceId)
| extend det = column_ifexists('details', '')
| parse det with "Occured at (UTC): " OccurredAt "Session ID: " SessionID "Trustee Name: " TrusteeName "Correlation ID: " CorrelationID "Source: " Source "WebSite Target: " WebSiteTarget "Product: " Product "Component: " Component "AD Information: " ADInformation "Object GUID: " ObjectGUID "Attribute: " Attribute "Distinguished Name: " DistinguishedName "Additional Information: "AdditionalInformation "Operation Detail: " OperationDetail "operationName: " operationName "trustee: " trustee "personas: " personas "Status: " status "Granted: " Granted "Result: " Result
| extend _AccessGranted = iif(operationName contains "CreateRbacIdentity", "Added", "Removed")
| extend _Identity = iif(operationName contains "CreateRbacIdentity", trustee, tostring(substring(trustee, 1, strlen(trustee))))
| extend _Identity = iif(operationName contains "CreateRbacIdentity", _Identity, replace_string(_Identity, "'", ""))
| extend add_personas = replace_string(replace_string(replace_string(personas, "{ Name = ", ""), " }", ""), ";", ",")
| extend remove_personas = replace_string(personas, ";", ",")
| extend grid_personas = iif(operationName contains "CreateRbacIdentity", add_personas, remove_personas)
| extend date_to_sort = format_datetime(TimeGenerated, "yyyy-mm-dd HH:mm:ss")
| order by date_to_sort desc
| extend NTDomain = tostring(split(TrusteeName, '\\', 0)[0]), LoginUser = tostring(split(TrusteeName, '\\', 1)[0])
| extend HostName = tostring(split(Computer, '.', 0)[0]), DnsDomain = tostring(strcat_array(array_slice(split(Computer, '.'), 1, -1), '.'))
status: Available
triggerOperator: gt
triggerThreshold: 0
name: Semperis DSP RBAC Changes
alertDetailsOverride:
alertDescriptionFormat: A RBAC change was detected in the DSP system.
alertDisplayNameFormat: RBAC Change -- Alert from Semperis Directory Services Protector
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Semperis Directory Services Protector/Analytic Rules/Semperis_DSP_RBAC_Changes.yaml
queryPeriod: 30m
severity: Medium
eventGroupingSettings:
aggregationKind: SingleAlert
entityMappings:
- entityType: Account
fieldMappings:
- columnName: LoginUser
identifier: Name
- columnName: NTDomain
identifier: NTDomain
- entityType: Host
fieldMappings:
- columnName: HostName
identifier: HostName
- columnName: DnsDomain
identifier: DnsDomain
queryFrequency: 30m
relevantTechniques:
- T1548
- T1098
requiredDataConnectors:
- dataTypes:
- dsp_parser
connectorId: SemperisDSP
kind: Scheduled
description: |
'Alerts when there are RBAC changes in the DSP system.'
tactics:
- PrivilegeEscalation
- Persistence
query: |
SecurityEvent
| where EventSourceName == 'Semperis-Operation-Log' and EventID == 20012
| order by TimeGenerated desc
| extend p1Xml = parse_xml(EventData).DataItem.EventData.Data
| mv-expand bagexpansion=array p1Xml
| evaluate bag_unpack(p1Xml)
| extend Name=column_ifexists('@Name', ''), Value=column_ifexists('#text', '')
| evaluate pivot(Name, any(Value), TimeGenerated, Computer, Level, EventLevelName, EventID, Type, _ResourceId)
| extend det = column_ifexists('details', '')
| parse det with "Occured at (UTC): " OccurredAt "Session ID: " SessionID "Trustee Name: " TrusteeName "Correlation ID: " CorrelationID "Source: " Source "WebSite Target: " WebSiteTarget "Product: " Product "Component: " Component "AD Information: " ADInformation "Object GUID: " ObjectGUID "Attribute: " Attribute "Distinguished Name: " DistinguishedName "Additional Information: "AdditionalInformation "Operation Detail: " OperationDetail "operationName: " operationName "trustee: " trustee "personas: " personas "Status: " status "Granted: " Granted "Result: " Result
| extend _AccessGranted = iif(operationName contains "CreateRbacIdentity", "Added", "Removed")
| extend _Identity = iif(operationName contains "CreateRbacIdentity", trustee, tostring(substring(trustee, 1, strlen(trustee))))
| extend _Identity = iif(operationName contains "CreateRbacIdentity", _Identity, replace_string(_Identity, "'", ""))
| extend add_personas = replace_string(replace_string(replace_string(personas, "{ Name = ", ""), " }", ""), ";", ",")
| extend remove_personas = replace_string(personas, ";", ",")
| extend grid_personas = iif(operationName contains "CreateRbacIdentity", add_personas, remove_personas)
| extend date_to_sort = format_datetime(TimeGenerated, "yyyy-mm-dd HH:mm:ss")
| order by date_to_sort desc
| extend NTDomain = tostring(split(TrusteeName, '\\', 0)[0]), LoginUser = tostring(split(TrusteeName, '\\', 1)[0])
| extend HostName = tostring(split(Computer, '.', 0)[0]), DnsDomain = tostring(strcat_array(array_slice(split(Computer, '.'), 1, -1), '.'))
id: e5edf3f3-de53-45e6-b0d7-1ce1c048df4a
version: 2.0.6
{
"$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/e5edf3f3-de53-45e6-b0d7-1ce1c048df4a')]",
"kind": "Scheduled",
"name": "[concat(parameters('workspace'),'/Microsoft.SecurityInsights/e5edf3f3-de53-45e6-b0d7-1ce1c048df4a')]",
"properties": {
"alertDetailsOverride": {
"alertDescriptionFormat": "A RBAC change was detected in the DSP system.",
"alertDisplayNameFormat": "RBAC Change -- Alert from Semperis Directory Services Protector"
},
"alertRuleTemplateName": "e5edf3f3-de53-45e6-b0d7-1ce1c048df4a",
"customDetails": null,
"description": "'Alerts when there are RBAC changes in the DSP system.'\n",
"displayName": "Semperis DSP RBAC Changes",
"enabled": true,
"entityMappings": [
{
"entityType": "Account",
"fieldMappings": [
{
"columnName": "LoginUser",
"identifier": "Name"
},
{
"columnName": "NTDomain",
"identifier": "NTDomain"
}
]
},
{
"entityType": "Host",
"fieldMappings": [
{
"columnName": "HostName",
"identifier": "HostName"
},
{
"columnName": "DnsDomain",
"identifier": "DnsDomain"
}
]
}
],
"eventGroupingSettings": {
"aggregationKind": "SingleAlert"
},
"OriginalUri": "https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Semperis Directory Services Protector/Analytic Rules/Semperis_DSP_RBAC_Changes.yaml",
"query": "SecurityEvent\n| where EventSourceName == 'Semperis-Operation-Log' and EventID == 20012 \n| order by TimeGenerated desc\n| extend p1Xml = parse_xml(EventData).DataItem.EventData.Data\n| mv-expand bagexpansion=array p1Xml\n| evaluate bag_unpack(p1Xml)\n| extend Name=column_ifexists('@Name', ''), Value=column_ifexists('#text', '')\n| evaluate pivot(Name, any(Value), TimeGenerated, Computer, Level, EventLevelName, EventID, Type, _ResourceId)\n| extend det = column_ifexists('details', '')\n| parse det with \"Occured at (UTC): \" OccurredAt \"Session ID: \" SessionID \"Trustee Name: \" TrusteeName \"Correlation ID: \" CorrelationID \"Source: \" Source \"WebSite Target: \" WebSiteTarget \"Product: \" Product \"Component: \" Component \"AD Information: \" ADInformation \"Object GUID: \" ObjectGUID \"Attribute: \" Attribute \"Distinguished Name: \" DistinguishedName \"Additional Information: \"AdditionalInformation \"Operation Detail: \" OperationDetail \"operationName: \" operationName \"trustee: \" trustee \"personas: \" personas \"Status: \" status \"Granted: \" Granted \"Result: \" Result\n| extend _AccessGranted = iif(operationName contains \"CreateRbacIdentity\", \"Added\", \"Removed\")\n| extend _Identity = iif(operationName contains \"CreateRbacIdentity\", trustee, tostring(substring(trustee, 1, strlen(trustee))))\n| extend _Identity = iif(operationName contains \"CreateRbacIdentity\", _Identity, replace_string(_Identity, \"'\", \"\"))\n| extend add_personas = replace_string(replace_string(replace_string(personas, \"{ Name = \", \"\"), \" }\", \"\"), \";\", \",\")\n| extend remove_personas = replace_string(personas, \";\", \",\")\n| extend grid_personas = iif(operationName contains \"CreateRbacIdentity\", add_personas, remove_personas)\n| extend date_to_sort = format_datetime(TimeGenerated, \"yyyy-mm-dd HH:mm:ss\")\n| order by date_to_sort desc\n| extend NTDomain = tostring(split(TrusteeName, '\\\\', 0)[0]), LoginUser = tostring(split(TrusteeName, '\\\\', 1)[0])\n| extend HostName = tostring(split(Computer, '.', 0)[0]), DnsDomain = tostring(strcat_array(array_slice(split(Computer, '.'), 1, -1), '.'))\n",
"queryFrequency": "PT30M",
"queryPeriod": "PT30M",
"severity": "Medium",
"status": "Available",
"subTechniques": [],
"suppressionDuration": "PT1H",
"suppressionEnabled": false,
"tactics": [
"Persistence",
"PrivilegeEscalation"
],
"techniques": [
"T1098",
"T1548"
],
"templateVersion": "2.0.6",
"triggerOperator": "GreaterThan",
"triggerThreshold": 0
},
"type": "Microsoft.OperationalInsights/workspaces/providers/alertRules"
}
]
}