Attempts to sign in to disabled accounts
Id | 75ea5c39-93e5-489b-b1e1-68fa6c9d2d04 |
Rulename | Attempts to sign in to disabled accounts |
Description | Identifies failed attempts to sign in to disabled accounts across multiple Azure Applications. Default threshold for Azure Applications attempted to sign in to is 3. References: https://docs.microsoft.com/azure/active-directory/reports-monitoring/reference-sign-ins-error-codes 50057 - User account is disabled. The account has been disabled by an administrator. |
Severity | Medium |
Tactics | InitialAccess |
Techniques | T1078 |
Required data connectors | AzureActiveDirectory |
Kind | Scheduled |
Query frequency | 1d |
Query period | 1d |
Trigger threshold | 0 |
Trigger operator | gt |
Source Uri | https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Azure Active Directory/Analytic Rules/DisabledAccountSigninsAcrossManyApplications.yaml |
Version | 1.0.1 |
Arm template | 75ea5c39-93e5-489b-b1e1-68fa6c9d2d04.json |
let threshold = 3;
let aadFunc = (tableName:string){
table(tableName)
| where ResultType == "50057"
| where ResultDescription =~ "User account is disabled. The account has been disabled by an administrator."
| summarize StartTime = min(TimeGenerated), EndTime = max(TimeGenerated), applicationCount = dcount(AppDisplayName),
applicationSet = make_set(AppDisplayName), count() by UserPrincipalName, IPAddress, Type
| where applicationCount >= threshold
| extend timestamp = StartTime, AccountCustomEntity = UserPrincipalName, IPCustomEntity = IPAddress
};
let aadSignin = aadFunc("SigninLogs");
let aadNonInt = aadFunc("AADNonInteractiveUserSignInLogs");
union isfuzzy=true aadSignin, aadNonInt
name: Attempts to sign in to disabled accounts
query: |
let threshold = 3;
let aadFunc = (tableName:string){
table(tableName)
| where ResultType == "50057"
| where ResultDescription =~ "User account is disabled. The account has been disabled by an administrator."
| summarize StartTime = min(TimeGenerated), EndTime = max(TimeGenerated), applicationCount = dcount(AppDisplayName),
applicationSet = make_set(AppDisplayName), count() by UserPrincipalName, IPAddress, Type
| where applicationCount >= threshold
| extend timestamp = StartTime, AccountCustomEntity = UserPrincipalName, IPCustomEntity = IPAddress
};
let aadSignin = aadFunc("SigninLogs");
let aadNonInt = aadFunc("AADNonInteractiveUserSignInLogs");
union isfuzzy=true aadSignin, aadNonInt
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Azure Active Directory/Analytic Rules/DisabledAccountSigninsAcrossManyApplications.yaml
queryFrequency: 1d
triggerThreshold: 0
requiredDataConnectors:
- dataTypes:
- SigninLogs
connectorId: AzureActiveDirectory
- dataTypes:
- AADNonInteractiveUserSignInLogs
connectorId: AzureActiveDirectory
version: 1.0.1
status: Available
queryPeriod: 1d
id: 75ea5c39-93e5-489b-b1e1-68fa6c9d2d04
triggerOperator: gt
entityMappings:
- fieldMappings:
- identifier: FullName
columnName: AccountCustomEntity
entityType: Account
- fieldMappings:
- identifier: Address
columnName: IPCustomEntity
entityType: IP
relevantTechniques:
- T1078
severity: Medium
description: |
'Identifies failed attempts to sign in to disabled accounts across multiple Azure Applications.
Default threshold for Azure Applications attempted to sign in to is 3.
References: https://docs.microsoft.com/azure/active-directory/reports-monitoring/reference-sign-ins-error-codes
50057 - User account is disabled. The account has been disabled by an administrator.'
kind: Scheduled
tactics:
- InitialAccess
{
"$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/75ea5c39-93e5-489b-b1e1-68fa6c9d2d04')]",
"name": "[concat(parameters('workspace'),'/Microsoft.SecurityInsights/75ea5c39-93e5-489b-b1e1-68fa6c9d2d04')]",
"type": "Microsoft.OperationalInsights/workspaces/providers/alertRules",
"kind": "Scheduled",
"apiVersion": "2022-11-01",
"properties": {
"displayName": "Attempts to sign in to disabled accounts",
"description": "'Identifies failed attempts to sign in to disabled accounts across multiple Azure Applications.\nDefault threshold for Azure Applications attempted to sign in to is 3.\nReferences: https://docs.microsoft.com/azure/active-directory/reports-monitoring/reference-sign-ins-error-codes\n50057 - User account is disabled. The account has been disabled by an administrator.'\n",
"severity": "Medium",
"enabled": true,
"query": "let threshold = 3;\nlet aadFunc = (tableName:string){\ntable(tableName)\n| where ResultType == \"50057\"\n| where ResultDescription =~ \"User account is disabled. The account has been disabled by an administrator.\"\n| summarize StartTime = min(TimeGenerated), EndTime = max(TimeGenerated), applicationCount = dcount(AppDisplayName),\napplicationSet = make_set(AppDisplayName), count() by UserPrincipalName, IPAddress, Type\n| where applicationCount >= threshold\n| extend timestamp = StartTime, AccountCustomEntity = UserPrincipalName, IPCustomEntity = IPAddress\n};\nlet aadSignin = aadFunc(\"SigninLogs\");\nlet aadNonInt = aadFunc(\"AADNonInteractiveUserSignInLogs\");\nunion isfuzzy=true aadSignin, aadNonInt\n",
"queryFrequency": "P1D",
"queryPeriod": "P1D",
"triggerOperator": "GreaterThan",
"triggerThreshold": 0,
"suppressionDuration": "PT1H",
"suppressionEnabled": false,
"tactics": [
"InitialAccess"
],
"techniques": [
"T1078"
],
"alertRuleTemplateName": "75ea5c39-93e5-489b-b1e1-68fa6c9d2d04",
"customDetails": null,
"entityMappings": [
{
"fieldMappings": [
{
"identifier": "FullName",
"columnName": "AccountCustomEntity"
}
],
"entityType": "Account"
},
{
"fieldMappings": [
{
"identifier": "Address",
"columnName": "IPCustomEntity"
}
],
"entityType": "IP"
}
],
"status": "Available",
"templateVersion": "1.0.1",
"OriginalUri": "https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Azure Active Directory/Analytic Rules/DisabledAccountSigninsAcrossManyApplications.yaml"
}
}
]
}