Semperis DSP Mimikatzs DCShadow Alert
Id | 1a6d0a49-64b3-4ca1-96c3-f154c16c218c |
Rulename | Semperis DSP Mimikatz’s DCShadow Alert |
Description | Mimikatz’s DCShadow switch allows a user who has compromised an AD domain, to inject arbitrary changes into AD using a “fake” domain controller. These changes bypass the security event log and can’t be spotted using normal AD tools. This rule looks for evidence that a machine has been used in this capacity. |
Severity | High |
Tactics | DefenseEvasion |
Techniques | T1207 |
Required data connectors | SemperisDSP |
Kind | Scheduled |
Query frequency | 1h |
Query period | 1h |
Trigger threshold | 0 |
Trigger operator | gt |
Source Uri | https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Semperis Directory Services Protector/Analytic Rules/SemperisDSP_EvidenceOfMimikatzDCShadowAttack.yaml |
Version | 1.0.1 |
Arm template | 1a6d0a49-64b3-4ca1-96c3-f154c16c218c.json |
dsp_parser
| where EventID == 9212
| where SecurityIndicatorName == "Evidence of Mimikatz DCShadow attack"
| extend NTDomain = tostring(split(UserName, '\\', 0)[0]), LoginUser = tostring(split(UserName, '\\', 1)[0])
| extend HostName = tostring(split(Computer, '.', 0)[0]), DnsDomain = tostring(strcat_array(array_slice(split(Computer, '.'), 1, -1), '.'))
status: Available
queryFrequency: 1h
description: |
'Mimikatz's DCShadow switch allows a user who has compromised an AD domain, to inject arbitrary changes into AD using a "fake" domain controller. These changes bypass the security event log and can't be spotted using normal AD tools. This rule looks for evidence that a machine has been used in this capacity.'
severity: High
version: 1.0.1
relevantTechniques:
- T1207
name: Semperis DSP Mimikatz's DCShadow Alert
triggerThreshold: 0
kind: Scheduled
query: |
dsp_parser
| where EventID == 9212
| where SecurityIndicatorName == "Evidence of Mimikatz DCShadow attack"
| extend NTDomain = tostring(split(UserName, '\\', 0)[0]), LoginUser = tostring(split(UserName, '\\', 1)[0])
| extend HostName = tostring(split(Computer, '.', 0)[0]), DnsDomain = tostring(strcat_array(array_slice(split(Computer, '.'), 1, -1), '.'))
triggerOperator: gt
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Semperis Directory Services Protector/Analytic Rules/SemperisDSP_EvidenceOfMimikatzDCShadowAttack.yaml
requiredDataConnectors:
- connectorId: SemperisDSP
dataTypes:
- dsp_parser
tactics:
- DefenseEvasion
id: 1a6d0a49-64b3-4ca1-96c3-f154c16c218c
queryPeriod: 1h
entityMappings:
- fieldMappings:
- columnName: LoginUser
identifier: Name
- columnName: NTDomain
identifier: NTDomain
entityType: Account
- fieldMappings:
- columnName: HostName
identifier: HostName
- columnName: DnsDomain
identifier: DnsDomain
entityType: Host
{
"$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/1a6d0a49-64b3-4ca1-96c3-f154c16c218c')]",
"kind": "Scheduled",
"name": "[concat(parameters('workspace'),'/Microsoft.SecurityInsights/1a6d0a49-64b3-4ca1-96c3-f154c16c218c')]",
"properties": {
"alertRuleTemplateName": "1a6d0a49-64b3-4ca1-96c3-f154c16c218c",
"customDetails": null,
"description": "'Mimikatz's DCShadow switch allows a user who has compromised an AD domain, to inject arbitrary changes into AD using a \"fake\" domain controller. These changes bypass the security event log and can't be spotted using normal AD tools. This rule looks for evidence that a machine has been used in this capacity.'\n",
"displayName": "Semperis DSP Mimikatz's DCShadow Alert",
"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"
}
]
}
],
"OriginalUri": "https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Semperis Directory Services Protector/Analytic Rules/SemperisDSP_EvidenceOfMimikatzDCShadowAttack.yaml",
"query": "dsp_parser\n| where EventID == 9212\n| where SecurityIndicatorName == \"Evidence of Mimikatz DCShadow attack\"\n| extend NTDomain = tostring(split(UserName, '\\\\', 0)[0]), LoginUser = tostring(split(UserName, '\\\\', 1)[0])\n| extend HostName = tostring(split(Computer, '.', 0)[0]), DnsDomain = tostring(strcat_array(array_slice(split(Computer, '.'), 1, -1), '.'))\n",
"queryFrequency": "PT1H",
"queryPeriod": "PT1H",
"severity": "High",
"status": "Available",
"subTechniques": [],
"suppressionDuration": "PT1H",
"suppressionEnabled": false,
"tactics": [
"DefenseEvasion"
],
"techniques": [
"T1207"
],
"templateVersion": "1.0.1",
"triggerOperator": "GreaterThan",
"triggerThreshold": 0
},
"type": "Microsoft.OperationalInsights/workspaces/providers/alertRules"
}
]
}