New country signIn with correct password
Id | 7808c05a-3afd-4d13-998a-a59e2297693f |
Rulename | New country signIn with correct password |
Description | Identifies an interrupted sign-in session from a country the user has not sign-in before in the last 7 days, where the password was correct. Although the session is interrupted by other controls such as multi factor authentication or conditional access policies, the user credentials should be reset due to logs indicating a correct password was observed during sign-in. |
Severity | Medium |
Tactics | InitialAccess CredentialAccess |
Techniques | T1078 T1110 |
Required data connectors | AzureActiveDirectory |
Kind | Scheduled |
Query frequency | 1d |
Query period | 7d |
Trigger threshold | 0 |
Trigger operator | gt |
Source Uri | https://github.com/Azure/Azure-Sentinel/blob/master/Detections/SigninLogs/NewCountryValidCreds.yaml |
Version | 1.0.1 |
Arm template | 7808c05a-3afd-4d13-998a-a59e2297693f.json |
// Creating a list of successful sign-in by users in the last 7 days.
let KnownUserCountry = (
SigninLogs
| where TimeGenerated between (ago(7d) .. ago(1d) )
| where ResultType == 0
| summarize KnownCountry = make_set(Location,1048576) by UserPrincipalName
);
// Identify sign-ins that are no successful but have the auth details indicating a correct password.
SigninLogs
| where TimeGenerated >= ago(1d)
| where ResultType != 0
| extend ParseAuth = parse_json(AuthenticationDetails)
| extend AuthMethod = tostring(ParseAuth.[0].authenticationMethod),
PasswordResult = tostring(ParseAuth.[0].authenticationStepResultDetail),
AuthSucceeded = tostring(ParseAuth.[0].succeeded)
| where PasswordResult == "Correct Password" or AuthSucceeded == "true"
| where AuthMethod == "Password"
| extend failureReason = tostring(Status.failureReason)
| summarize NewCountry = make_set(Location,1048576), LastObservedTime = max(TimeGenerated), AppName = make_set(AppDisplayName,1048576) by UserPrincipalName, PasswordResult, AuthSucceeded, failureReason
// Combining both tables by user
| join kind=inner KnownUserCountry on UserPrincipalName
// Compare both arrays and identify if the country has been observed in the past.
| extend CountryDiff = set_difference(NewCountry,KnownCountry)
| extend CountryDiffCount = array_length(CountryDiff)
// Count the new column to only alert if there is a difference between both arrays
| where CountryDiffCount != 0
| extend NewCountryEvent = CountryDiff
// Getting UserName and Domain
| extend Name = split(UserPrincipalName,"@",0),
Domain = split(UserPrincipalName,"@",1)
| mv-expand Name,Domain
severity: Medium
name: New country signIn with correct password
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Detections/SigninLogs/NewCountryValidCreds.yaml
requiredDataConnectors:
- dataTypes:
- SigninLogs
connectorId: AzureActiveDirectory
id: 7808c05a-3afd-4d13-998a-a59e2297693f
tactics:
- InitialAccess
- CredentialAccess
queryFrequency: 1d
eventGroupingSettings:
aggregationKind: SingleAlert
triggerOperator: gt
metadata:
author:
name: Juanse
support:
tier: Community
categories:
domains:
- Identity
- Security - Threat Protection
source:
kind: Community
customDetails:
PasswordResult: PasswordResult
AuthSucceeded: AuthSucceeded
AppName: AppName
LastObservedTime: LastObservedTime
NewCountryEvent: NewCountryEvent
failureReason: failureReason
description: |
'Identifies an interrupted sign-in session from a country the user has not sign-in before in the last 7 days, where the password was correct. Although the session is interrupted by other controls such as multi factor authentication or conditional access policies, the user credentials should be reset due to logs indicating a correct password was observed during sign-in.'
triggerThreshold: 0
kind: Scheduled
relevantTechniques:
- T1078
- T1110
query: |
// Creating a list of successful sign-in by users in the last 7 days.
let KnownUserCountry = (
SigninLogs
| where TimeGenerated between (ago(7d) .. ago(1d) )
| where ResultType == 0
| summarize KnownCountry = make_set(Location,1048576) by UserPrincipalName
);
// Identify sign-ins that are no successful but have the auth details indicating a correct password.
SigninLogs
| where TimeGenerated >= ago(1d)
| where ResultType != 0
| extend ParseAuth = parse_json(AuthenticationDetails)
| extend AuthMethod = tostring(ParseAuth.[0].authenticationMethod),
PasswordResult = tostring(ParseAuth.[0].authenticationStepResultDetail),
AuthSucceeded = tostring(ParseAuth.[0].succeeded)
| where PasswordResult == "Correct Password" or AuthSucceeded == "true"
| where AuthMethod == "Password"
| extend failureReason = tostring(Status.failureReason)
| summarize NewCountry = make_set(Location,1048576), LastObservedTime = max(TimeGenerated), AppName = make_set(AppDisplayName,1048576) by UserPrincipalName, PasswordResult, AuthSucceeded, failureReason
// Combining both tables by user
| join kind=inner KnownUserCountry on UserPrincipalName
// Compare both arrays and identify if the country has been observed in the past.
| extend CountryDiff = set_difference(NewCountry,KnownCountry)
| extend CountryDiffCount = array_length(CountryDiff)
// Count the new column to only alert if there is a difference between both arrays
| where CountryDiffCount != 0
| extend NewCountryEvent = CountryDiff
// Getting UserName and Domain
| extend Name = split(UserPrincipalName,"@",0),
Domain = split(UserPrincipalName,"@",1)
| mv-expand Name,Domain
entityMappings:
- entityType: Account
fieldMappings:
- columnName: Name
identifier: Name
- columnName: Domain
identifier: NTDomain
version: 1.0.1
queryPeriod: 7d
{
"$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/7808c05a-3afd-4d13-998a-a59e2297693f')]",
"name": "[concat(parameters('workspace'),'/Microsoft.SecurityInsights/7808c05a-3afd-4d13-998a-a59e2297693f')]",
"type": "Microsoft.OperationalInsights/workspaces/providers/alertRules",
"kind": "Scheduled",
"apiVersion": "2022-11-01-preview",
"properties": {
"displayName": "New country signIn with correct password",
"description": "'Identifies an interrupted sign-in session from a country the user has not sign-in before in the last 7 days, where the password was correct. Although the session is interrupted by other controls such as multi factor authentication or conditional access policies, the user credentials should be reset due to logs indicating a correct password was observed during sign-in.'\n",
"severity": "Medium",
"enabled": true,
"query": "// Creating a list of successful sign-in by users in the last 7 days.\nlet KnownUserCountry = (\nSigninLogs\n| where TimeGenerated between (ago(7d) .. ago(1d) ) \n| where ResultType == 0\n| summarize KnownCountry = make_set(Location,1048576) by UserPrincipalName\n);\n// Identify sign-ins that are no successful but have the auth details indicating a correct password.\nSigninLogs\n| where TimeGenerated >= ago(1d)\n| where ResultType != 0\n| extend ParseAuth = parse_json(AuthenticationDetails)\n| extend AuthMethod = tostring(ParseAuth.[0].authenticationMethod),\n PasswordResult = tostring(ParseAuth.[0].authenticationStepResultDetail),\n AuthSucceeded = tostring(ParseAuth.[0].succeeded)\n| where PasswordResult == \"Correct Password\" or AuthSucceeded == \"true\"\n| where AuthMethod == \"Password\"\n| extend failureReason = tostring(Status.failureReason)\n| summarize NewCountry = make_set(Location,1048576), LastObservedTime = max(TimeGenerated), AppName = make_set(AppDisplayName,1048576) by UserPrincipalName, PasswordResult, AuthSucceeded, failureReason\n// Combining both tables by user\n| join kind=inner KnownUserCountry on UserPrincipalName\n// Compare both arrays and identify if the country has been observed in the past.\n| extend CountryDiff = set_difference(NewCountry,KnownCountry)\n| extend CountryDiffCount = array_length(CountryDiff)\n// Count the new column to only alert if there is a difference between both arrays\n| where CountryDiffCount != 0\n| extend NewCountryEvent = CountryDiff\n// Getting UserName and Domain\n| extend Name = split(UserPrincipalName,\"@\",0),\n Domain = split(UserPrincipalName,\"@\",1)\n| mv-expand Name,Domain\n",
"queryFrequency": "P1D",
"queryPeriod": "P7D",
"triggerOperator": "GreaterThan",
"triggerThreshold": 0,
"suppressionDuration": "PT1H",
"suppressionEnabled": false,
"tactics": [
"InitialAccess",
"CredentialAccess"
],
"techniques": [
"T1078",
"T1110"
],
"alertRuleTemplateName": "7808c05a-3afd-4d13-998a-a59e2297693f",
"eventGroupingSettings": {
"aggregationKind": "SingleAlert"
},
"customDetails": {
"PasswordResult": "PasswordResult",
"AuthSucceeded": "AuthSucceeded",
"AppName": "AppName",
"LastObservedTime": "LastObservedTime",
"NewCountryEvent": "NewCountryEvent",
"failureReason": "failureReason"
},
"entityMappings": [
{
"fieldMappings": [
{
"identifier": "Name",
"columnName": "Name"
},
{
"identifier": "NTDomain",
"columnName": "Domain"
}
],
"entityType": "Account"
}
],
"OriginalUri": "https://github.com/Azure/Azure-Sentinel/blob/master/Detections/SigninLogs/NewCountryValidCreds.yaml",
"templateVersion": "1.0.1"
}
}
]
}