Login to AWS Management Console without MFA
Id | d25b1998-a592-4bc5-8a3a-92b39eedb1bc |
Rulename | Login to AWS Management Console without MFA |
Description | Multi-Factor Authentication (MFA) helps you to prevent credential compromise. This alert identifies logins to the AWS Management Console without MFA. You can limit this detection to trigger for adminsitrative accounts if you do not have MFA enabled on all accounts. This is done by looking at the eventName ConsoleLogin and if the AdditionalEventData field indicates MFA was NOT used and the ResponseElements field indicates NOT a Failure. Thereby indicating that a non-MFA login was successful. |
Severity | Low |
Tactics | DefenseEvasion PrivilegeEscalation Persistence InitialAccess |
Techniques | T1078 |
Required data connectors | AWS AWSS3 |
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/Amazon Web Services/Analytic Rules/AWS_ConsoleLogonWithoutMFA.yaml |
Version | 1.0.3 |
Arm template | d25b1998-a592-4bc5-8a3a-92b39eedb1bc.json |
AWSCloudTrail
| where EventName =~ "ConsoleLogin"
| extend MFAUsed = tostring(parse_json(AdditionalEventData).MFAUsed), LoginResult = tostring(parse_json(ResponseElements).ConsoleLogin), indexId = indexof(tostring(UserIdentityPrincipalid),":")
| where MFAUsed !~ "Yes" and LoginResult !~ "Failure"
| where SessionIssuerUserName !contains "AWSReservedSSO"
| summarize StartTimeUtc = min(TimeGenerated), EndTimeUtc = max(TimeGenerated) by EventName, EventTypeName, LoginResult, MFAUsed, UserIdentityAccountId, UserIdentityPrincipalid, UserAgent,
UserIdentityUserName, SessionMfaAuthenticated, SourceIpAddress, AWSRegion, indexId
| extend timestamp = StartTimeUtc, AccountCustomEntity = iif(isempty(UserIdentityUserName),substring(UserIdentityPrincipalid, toint(indexId)+1), UserIdentityUserName), IPCustomEntity = SourceIpAddress
severity: Low
triggerThreshold: 0
query: |
AWSCloudTrail
| where EventName =~ "ConsoleLogin"
| extend MFAUsed = tostring(parse_json(AdditionalEventData).MFAUsed), LoginResult = tostring(parse_json(ResponseElements).ConsoleLogin), indexId = indexof(tostring(UserIdentityPrincipalid),":")
| where MFAUsed !~ "Yes" and LoginResult !~ "Failure"
| where SessionIssuerUserName !contains "AWSReservedSSO"
| summarize StartTimeUtc = min(TimeGenerated), EndTimeUtc = max(TimeGenerated) by EventName, EventTypeName, LoginResult, MFAUsed, UserIdentityAccountId, UserIdentityPrincipalid, UserAgent,
UserIdentityUserName, SessionMfaAuthenticated, SourceIpAddress, AWSRegion, indexId
| extend timestamp = StartTimeUtc, AccountCustomEntity = iif(isempty(UserIdentityUserName),substring(UserIdentityPrincipalid, toint(indexId)+1), UserIdentityUserName), IPCustomEntity = SourceIpAddress
queryFrequency: 1d
requiredDataConnectors:
- connectorId: AWS
dataTypes:
- AWSCloudTrail
- connectorId: AWSS3
dataTypes:
- AWSCloudTrail
id: d25b1998-a592-4bc5-8a3a-92b39eedb1bc
version: 1.0.3
name: Login to AWS Management Console without MFA
kind: Scheduled
status: Available
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Amazon Web Services/Analytic Rules/AWS_ConsoleLogonWithoutMFA.yaml
queryPeriod: 1d
relevantTechniques:
- T1078
triggerOperator: gt
tactics:
- DefenseEvasion
- PrivilegeEscalation
- Persistence
- InitialAccess
description: |
'Multi-Factor Authentication (MFA) helps you to prevent credential compromise. This alert identifies logins to the AWS Management Console without MFA.
You can limit this detection to trigger for adminsitrative accounts if you do not have MFA enabled on all accounts.
This is done by looking at the eventName ConsoleLogin and if the AdditionalEventData field indicates MFA was NOT used
and the ResponseElements field indicates NOT a Failure. Thereby indicating that a non-MFA login was successful.'
entityMappings:
- entityType: Account
fieldMappings:
- identifier: FullName
columnName: AccountCustomEntity
- entityType: IP
fieldMappings:
- identifier: Address
columnName: IPCustomEntity
{
"$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/d25b1998-a592-4bc5-8a3a-92b39eedb1bc')]",
"name": "[concat(parameters('workspace'),'/Microsoft.SecurityInsights/d25b1998-a592-4bc5-8a3a-92b39eedb1bc')]",
"type": "Microsoft.OperationalInsights/workspaces/providers/alertRules",
"kind": "Scheduled",
"apiVersion": "2022-11-01",
"properties": {
"displayName": "Login to AWS Management Console without MFA",
"description": "'Multi-Factor Authentication (MFA) helps you to prevent credential compromise. This alert identifies logins to the AWS Management Console without MFA.\nYou can limit this detection to trigger for adminsitrative accounts if you do not have MFA enabled on all accounts.\nThis is done by looking at the eventName ConsoleLogin and if the AdditionalEventData field indicates MFA was NOT used\nand the ResponseElements field indicates NOT a Failure. Thereby indicating that a non-MFA login was successful.'\n",
"severity": "Low",
"enabled": true,
"query": "AWSCloudTrail\n| where EventName =~ \"ConsoleLogin\"\n| extend MFAUsed = tostring(parse_json(AdditionalEventData).MFAUsed), LoginResult = tostring(parse_json(ResponseElements).ConsoleLogin), indexId = indexof(tostring(UserIdentityPrincipalid),\":\")\n| where MFAUsed !~ \"Yes\" and LoginResult !~ \"Failure\"\n| where SessionIssuerUserName !contains \"AWSReservedSSO\"\n| summarize StartTimeUtc = min(TimeGenerated), EndTimeUtc = max(TimeGenerated) by EventName, EventTypeName, LoginResult, MFAUsed, UserIdentityAccountId, UserIdentityPrincipalid, UserAgent,\nUserIdentityUserName, SessionMfaAuthenticated, SourceIpAddress, AWSRegion, indexId\n| extend timestamp = StartTimeUtc, AccountCustomEntity = iif(isempty(UserIdentityUserName),substring(UserIdentityPrincipalid, toint(indexId)+1), UserIdentityUserName), IPCustomEntity = SourceIpAddress\n",
"queryFrequency": "P1D",
"queryPeriod": "P1D",
"triggerOperator": "GreaterThan",
"triggerThreshold": 0,
"suppressionDuration": "PT1H",
"suppressionEnabled": false,
"tactics": [
"DefenseEvasion",
"PrivilegeEscalation",
"Persistence",
"InitialAccess"
],
"techniques": [
"T1078"
],
"alertRuleTemplateName": "d25b1998-a592-4bc5-8a3a-92b39eedb1bc",
"customDetails": null,
"entityMappings": [
{
"fieldMappings": [
{
"columnName": "AccountCustomEntity",
"identifier": "FullName"
}
],
"entityType": "Account"
},
{
"fieldMappings": [
{
"columnName": "IPCustomEntity",
"identifier": "Address"
}
],
"entityType": "IP"
}
],
"OriginalUri": "https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Amazon Web Services/Analytic Rules/AWS_ConsoleLogonWithoutMFA.yaml",
"templateVersion": "1.0.3",
"status": "Available"
}
}
]
}