MFA disabled for a user
Id | 65c78944-930b-4cae-bd79-c3664ae30ba7 |
Rulename | MFA disabled for a user |
Description | Multi-Factor Authentication (MFA) helps prevent credential compromise. This alert identifies when an attempt has been made to disable MFA for a user |
Severity | Medium |
Tactics | CredentialAccess Persistence |
Techniques | T1098 T1556 |
Required data connectors | AWS AzureActiveDirectory |
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/Cloud Identity Threat Protection Essentials/Analytic Rules/MFADisable.yaml |
Version | 1.0.3 |
Arm template | 65c78944-930b-4cae-bd79-c3664ae30ba7.json |
(union isfuzzy=true
(AuditLogs
| where OperationName =~ "Disable Strong Authentication"
| extend IPAddress = tostring(parse_json(tostring(InitiatedBy.user)).ipAddress)
| extend InitiatedByUser = iff(isnotempty(tostring(parse_json(tostring(InitiatedBy.user)).userPrincipalName)),
tostring(parse_json(tostring(InitiatedBy.user)).userPrincipalName), tostring(parse_json(tostring(InitiatedBy.app)).displayName))
| extend Targetprop = todynamic(TargetResources)
| extend TargetUser = tostring(Targetprop[0].userPrincipalName)
| summarize StartTimeUtc = min(TimeGenerated), EndTimeUtc = max(TimeGenerated) by User = TargetUser, InitiatedByUser , Operation = OperationName , CorrelationId, IPAddress, Category, Source = SourceSystem , AADTenantId, Type
),
(AWSCloudTrail
| where EventName in~ ("DeactivateMFADevice", "DeleteVirtualMFADevice")
| extend InstanceProfileName = tostring(parse_json(RequestParameters).InstanceProfileName)
| extend TargetUser = tostring(parse_json(RequestParameters).userName)
| summarize StartTimeUtc = min(TimeGenerated), EndTimeUtc = max(TimeGenerated) by User = TargetUser, Source = EventSource , Operation = EventName , TenantorInstance_Detail = InstanceProfileName, IPAddress = SourceIpAddress
)
)
| extend timestamp = StartTimeUtc, AccountCustomEntity = User, IPCustomEntity = IPAddress
version: 1.0.3
queryFrequency: 1h
requiredDataConnectors:
- connectorId: AzureActiveDirectory
dataTypes:
- AuditLogs
- connectorId: AWS
dataTypes:
- AWSCloudTrail
entityMappings:
- fieldMappings:
- columnName: AccountCustomEntity
identifier: FullName
entityType: Account
- fieldMappings:
- columnName: IPCustomEntity
identifier: Address
entityType: IP
kind: Scheduled
queryPeriod: 1h
severity: Medium
query: |
(union isfuzzy=true
(AuditLogs
| where OperationName =~ "Disable Strong Authentication"
| extend IPAddress = tostring(parse_json(tostring(InitiatedBy.user)).ipAddress)
| extend InitiatedByUser = iff(isnotempty(tostring(parse_json(tostring(InitiatedBy.user)).userPrincipalName)),
tostring(parse_json(tostring(InitiatedBy.user)).userPrincipalName), tostring(parse_json(tostring(InitiatedBy.app)).displayName))
| extend Targetprop = todynamic(TargetResources)
| extend TargetUser = tostring(Targetprop[0].userPrincipalName)
| summarize StartTimeUtc = min(TimeGenerated), EndTimeUtc = max(TimeGenerated) by User = TargetUser, InitiatedByUser , Operation = OperationName , CorrelationId, IPAddress, Category, Source = SourceSystem , AADTenantId, Type
),
(AWSCloudTrail
| where EventName in~ ("DeactivateMFADevice", "DeleteVirtualMFADevice")
| extend InstanceProfileName = tostring(parse_json(RequestParameters).InstanceProfileName)
| extend TargetUser = tostring(parse_json(RequestParameters).userName)
| summarize StartTimeUtc = min(TimeGenerated), EndTimeUtc = max(TimeGenerated) by User = TargetUser, Source = EventSource , Operation = EventName , TenantorInstance_Detail = InstanceProfileName, IPAddress = SourceIpAddress
)
)
| extend timestamp = StartTimeUtc, AccountCustomEntity = User, IPCustomEntity = IPAddress
triggerOperator: gt
id: 65c78944-930b-4cae-bd79-c3664ae30ba7
description: |
'Multi-Factor Authentication (MFA) helps prevent credential compromise. This alert identifies when an attempt has been made to disable MFA for a user '
triggerThreshold: 0
name: MFA disabled for a user
relevantTechniques:
- T1098
- T1556
tactics:
- CredentialAccess
- Persistence
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Cloud Identity Threat Protection Essentials/Analytic Rules/MFADisable.yaml
{
"$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/65c78944-930b-4cae-bd79-c3664ae30ba7')]",
"name": "[concat(parameters('workspace'),'/Microsoft.SecurityInsights/65c78944-930b-4cae-bd79-c3664ae30ba7')]",
"type": "Microsoft.OperationalInsights/workspaces/providers/alertRules",
"kind": "Scheduled",
"apiVersion": "2022-11-01",
"properties": {
"displayName": "MFA disabled for a user",
"description": "'Multi-Factor Authentication (MFA) helps prevent credential compromise. This alert identifies when an attempt has been made to disable MFA for a user '\n",
"severity": "Medium",
"enabled": true,
"query": "(union isfuzzy=true\n(AuditLogs\n| where OperationName =~ \"Disable Strong Authentication\"\n| extend IPAddress = tostring(parse_json(tostring(InitiatedBy.user)).ipAddress)\n| extend InitiatedByUser = iff(isnotempty(tostring(parse_json(tostring(InitiatedBy.user)).userPrincipalName)),\n tostring(parse_json(tostring(InitiatedBy.user)).userPrincipalName), tostring(parse_json(tostring(InitiatedBy.app)).displayName))\n| extend Targetprop = todynamic(TargetResources)\n| extend TargetUser = tostring(Targetprop[0].userPrincipalName)\n| summarize StartTimeUtc = min(TimeGenerated), EndTimeUtc = max(TimeGenerated) by User = TargetUser, InitiatedByUser , Operation = OperationName , CorrelationId, IPAddress, Category, Source = SourceSystem , AADTenantId, Type\n),\n(AWSCloudTrail\n| where EventName in~ (\"DeactivateMFADevice\", \"DeleteVirtualMFADevice\")\n| extend InstanceProfileName = tostring(parse_json(RequestParameters).InstanceProfileName)\n| extend TargetUser = tostring(parse_json(RequestParameters).userName)\n| summarize StartTimeUtc = min(TimeGenerated), EndTimeUtc = max(TimeGenerated) by User = TargetUser, Source = EventSource , Operation = EventName , TenantorInstance_Detail = InstanceProfileName, IPAddress = SourceIpAddress\n)\n)\n| extend timestamp = StartTimeUtc, AccountCustomEntity = User, IPCustomEntity = IPAddress\n",
"queryFrequency": "PT1H",
"queryPeriod": "PT1H",
"triggerOperator": "GreaterThan",
"triggerThreshold": 0,
"suppressionDuration": "PT1H",
"suppressionEnabled": false,
"tactics": [
"CredentialAccess",
"Persistence"
],
"techniques": [
"T1098",
"T1556"
],
"alertRuleTemplateName": "65c78944-930b-4cae-bd79-c3664ae30ba7",
"customDetails": null,
"entityMappings": [
{
"entityType": "Account",
"fieldMappings": [
{
"identifier": "FullName",
"columnName": "AccountCustomEntity"
}
]
},
{
"entityType": "IP",
"fieldMappings": [
{
"identifier": "Address",
"columnName": "IPCustomEntity"
}
]
}
],
"OriginalUri": "https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Cloud Identity Threat Protection Essentials/Analytic Rules/MFADisable.yaml",
"templateVersion": "1.0.3"
}
}
]
}