[Deprecated] Explicit MFA Deny
Id | a22740ec-fc1e-4c91-8de6-c29c6450ad00 |
Rulename | [Deprecated] Explicit MFA Deny |
Description | User explicitly denies MFA push, indicating that login was not expected and the account’s password may be compromised. This rule is deprecated as of July-2024. Alternative rule with similar logic and contex from more data source is available at https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Microsoft%20Entra%20ID/Analytic%20Rules/MFARejectedbyUser.yaml |
Severity | Medium |
Tactics | CredentialAccess |
Techniques | T1110 |
Required data connectors | AzureActiveDirectory MicrosoftThreatProtection |
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/Microsoft Entra ID/Analytic Rules/ExplicitMFADeny.yaml |
Version | 1.0.7 |
Arm template | a22740ec-fc1e-4c91-8de6-c29c6450ad00.json |
let aadFunc = (tableName: string) {
table(tableName)
| where ResultType == 500121
| where Status has "MFA Denied; user declined the authentication" or Status has "MFA denied; Phone App Reported Fraud"
| extend Type = Type, PublicIP = IPAddress
| extend
Name = tostring(split(UserPrincipalName, '@', 0)[0]),
UPNSuffix = tostring(split(UserPrincipalName, '@', 1)[0])
};
let aadSignin = aadFunc("SigninLogs");
let dvcInfo = DeviceInfo
| extend SensorHealthState = column_ifexists("SensorHealthState", "")
| where OnboardingStatus == "Onboarded" and SensorHealthState == "Active"
| project PublicIP, AadDeviceId;
let aadNonInt = aadFunc("AADNonInteractiveUserSignInLogs");
union isfuzzy=true aadSignin, aadNonInt
| join kind=leftouter dvcInfo on PublicIP
queryFrequency: 1h
description: |
'User explicitly denies MFA push, indicating that login was not expected and the account's password may be compromised.
This rule is deprecated as of July-2024. Alternative rule with similar logic and contex from more data source
is available at https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Microsoft%20Entra%20ID/Analytic%20Rules/MFARejectedbyUser.yaml'
status: Available
version: 1.0.7
relevantTechniques:
- T1110
name: '[Deprecated] Explicit MFA Deny'
triggerThreshold: 0
kind: Scheduled
query: |
let aadFunc = (tableName: string) {
table(tableName)
| where ResultType == 500121
| where Status has "MFA Denied; user declined the authentication" or Status has "MFA denied; Phone App Reported Fraud"
| extend Type = Type, PublicIP = IPAddress
| extend
Name = tostring(split(UserPrincipalName, '@', 0)[0]),
UPNSuffix = tostring(split(UserPrincipalName, '@', 1)[0])
};
let aadSignin = aadFunc("SigninLogs");
let dvcInfo = DeviceInfo
| extend SensorHealthState = column_ifexists("SensorHealthState", "")
| where OnboardingStatus == "Onboarded" and SensorHealthState == "Active"
| project PublicIP, AadDeviceId;
let aadNonInt = aadFunc("AADNonInteractiveUserSignInLogs");
union isfuzzy=true aadSignin, aadNonInt
| join kind=leftouter dvcInfo on PublicIP
triggerOperator: gt
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Microsoft Entra ID/Analytic Rules/ExplicitMFADeny.yaml
requiredDataConnectors:
- connectorId: AzureActiveDirectory
dataTypes:
- SigninLogs
- connectorId: AzureActiveDirectory
dataTypes:
- AADNonInteractiveUserSignInLogs
- connectorId: MicrosoftThreatProtection
dataTypes:
- DeviceInfo
tactics:
- CredentialAccess
severity: Medium
id: a22740ec-fc1e-4c91-8de6-c29c6450ad00
queryPeriod: 1h
entityMappings:
- fieldMappings:
- columnName: UserPrincipalName
identifier: FullName
- columnName: Name
identifier: Name
- columnName: UPNSuffix
identifier: UPNSuffix
entityType: Account
- fieldMappings:
- columnName: PublicIP
identifier: Address
entityType: IP
- fieldMappings:
- columnName: ResourceId
identifier: ResourceId
entityType: AzureResource
- fieldMappings:
- columnName: AppDisplayName
identifier: Name
- columnName: AppId
identifier: AppId
entityType: CloudApplication
{
"$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/a22740ec-fc1e-4c91-8de6-c29c6450ad00')]",
"kind": "Scheduled",
"name": "[concat(parameters('workspace'),'/Microsoft.SecurityInsights/a22740ec-fc1e-4c91-8de6-c29c6450ad00')]",
"properties": {
"alertRuleTemplateName": "a22740ec-fc1e-4c91-8de6-c29c6450ad00",
"customDetails": null,
"description": "'User explicitly denies MFA push, indicating that login was not expected and the account's password may be compromised.\nThis rule is deprecated as of July-2024. Alternative rule with similar logic and contex from more data source \nis available at https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Microsoft%20Entra%20ID/Analytic%20Rules/MFARejectedbyUser.yaml'\n",
"displayName": "[Deprecated] Explicit MFA Deny",
"enabled": true,
"entityMappings": [
{
"entityType": "Account",
"fieldMappings": [
{
"columnName": "UserPrincipalName",
"identifier": "FullName"
},
{
"columnName": "Name",
"identifier": "Name"
},
{
"columnName": "UPNSuffix",
"identifier": "UPNSuffix"
}
]
},
{
"entityType": "IP",
"fieldMappings": [
{
"columnName": "PublicIP",
"identifier": "Address"
}
]
},
{
"entityType": "AzureResource",
"fieldMappings": [
{
"columnName": "ResourceId",
"identifier": "ResourceId"
}
]
},
{
"entityType": "CloudApplication",
"fieldMappings": [
{
"columnName": "AppDisplayName",
"identifier": "Name"
},
{
"columnName": "AppId",
"identifier": "AppId"
}
]
}
],
"OriginalUri": "https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Microsoft Entra ID/Analytic Rules/ExplicitMFADeny.yaml",
"query": "let aadFunc = (tableName: string) {\n table(tableName)\n | where ResultType == 500121\n | where Status has \"MFA Denied; user declined the authentication\" or Status has \"MFA denied; Phone App Reported Fraud\"\n | extend Type = Type, PublicIP = IPAddress\n | extend\n Name = tostring(split(UserPrincipalName, '@', 0)[0]),\n UPNSuffix = tostring(split(UserPrincipalName, '@', 1)[0])\n};\nlet aadSignin = aadFunc(\"SigninLogs\");\nlet dvcInfo = DeviceInfo\n | extend SensorHealthState = column_ifexists(\"SensorHealthState\", \"\")\n | where OnboardingStatus == \"Onboarded\" and SensorHealthState == \"Active\"\n | project PublicIP, AadDeviceId;\nlet aadNonInt = aadFunc(\"AADNonInteractiveUserSignInLogs\");\nunion isfuzzy=true aadSignin, aadNonInt\n| join kind=leftouter dvcInfo on PublicIP\n",
"queryFrequency": "PT1H",
"queryPeriod": "PT1H",
"severity": "Medium",
"status": "Available",
"subTechniques": [],
"suppressionDuration": "PT1H",
"suppressionEnabled": false,
"tactics": [
"CredentialAccess"
],
"techniques": [
"T1110"
],
"templateVersion": "1.0.7",
"triggerOperator": "GreaterThan",
"triggerThreshold": 0
},
"type": "Microsoft.OperationalInsights/workspaces/providers/alertRules"
}
]
}