Cross-Cloud Unauthorized Credential Access Detection From AWS RDS Login

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Id	122fbc6a-57ab-4aa7-b9a9-51ac4970cac1
Rulename	Cross-Cloud Unauthorized Credential Access Detection From AWS RDS Login
Description	This detection correlates AWS GuardDuty Credential Access alerts related to Amazon Relational Database Service (RDS) activity with Azure portal sign-in activities. It identifies successful and failed logins, anomalous behavior, and malicious IP access. By joining these datasets on network entities and IP addresses, it detects unauthorized credential access attempts across AWS and Azure resources, enhancing cross-cloud security monitoring.
Severity	Medium
Tactics	CredentialAccess InitialAccess
Techniques	T1557 T1110 T1110.003 T1110.004 T1606 T1556 T1133
Required data connectors	AWSS3 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/Multi Cloud Attack Coverage Essentials - Resource Abuse/Analytic Rules/CrossCloudUnauthorizedCredentialsAccessDetection.yaml
Version	1.0.3
Arm template	122fbc6a-57ab-4aa7-b9a9-51ac4970cac1.json

KQL

// Define variable 'AwsAlert' to collect AWS GuardDuty CredentialAccess alerts related to Amazon Relational Database Service (RDS) activity
let AwsAlert = materialize (
    AWSGuardDuty
    | where ActivityType has_any (
        "CredentialAccess:RDS/TorIPCaller.SuccessfulLogin",
        "CredentialAccess:RDS/TorIPCaller.FailedLogin",
        "CredentialAccess:RDS/AnomalousBehavior.SuccessfulBruteForce",
        "CredentialAccess:RDS/AnomalousBehavior.SuccessfulLogin",
        "CredentialAccess:RDS/MaliciousIPCaller.SuccessfulLogin",
        "CredentialAccess:RDS/MaliciousIPCaller.FailedLogin"
        )
    | extend
        AWSAlertId = Id, 
        AWSAlertTitle = Title,
        AWSAlertDescription = Description,
        AWSresourceType = tostring(parse_json(ResourceDetails).resourceType),
        AWSNetworkEntity = tostring(parse_json(ServiceDetails).action.rdsLoginAttemptAction.remoteIpDetails.ipAddressV4),
        RDSInstanceId = tostring(parse_json(ResourceDetails).rdsDbInstanceDetails.dbInstanceIdentifier),
        RDSUser = tostring(parse_json(ResourceDetails).rdsDbUserDetails.user),
        RDSApplication = tostring(parse_json(ResourceDetails).rdsDbUserDetails.application),
        RDSactionType = tostring(parse_json(ServiceDetails).action.actionType),
        AWSAlertTime = TimeCreated,
        AWSAlertLink= tostring(strcat('https://us-east-1.console.aws.amazon.com/guardduty/home?region=us-east-1#/findings?macros=current&fId=',Id)),
        Severity = 
  case (
    Severity >= 7.0, "High",
    Severity between (4.0 .. 6.9), "Medium",
    Severity between (1.0 .. 3.9), "Low",
    "Unknown")
    | distinct
        AWSAlertTime,
        ActivityType,
        AWSAlertId,
        AWSAlertLink,
        AWSAlertTitle,
        AWSAlertDescription,
        AWSresourceType,
        Arn,
        Severity,
        RDSactionType,
        RDSApplication,
        RDSInstanceId,
        RDSUser,
        AWSNetworkEntity
    );
  // Define variable 'Azure_sigin' to collect Azure portal sign-in activities
  let Azure_sigin = materialize (
      SigninLogs
      | where AppDisplayName == "Azure Portal"
      | where isnotempty(OriginalRequestId)
      | summarize 
          AzureSuccessfulEvent = countif(ResultType == 0), 
          AzureFailedEvent = countif(ResultType != 0), 
          totalAzureLoginEventId = dcount(OriginalRequestId), 
          AzureFailedEventsCount = dcountif(OriginalRequestId, ResultType != 0), 
          AzureSuccessfuleventsCount = dcountif(OriginalRequestId, ResultType == 0),
          AzureSetOfFailedevents = makeset(iff(ResultType != 0, OriginalRequestId, ""), 5), 
          AzureSetOfSuccessfulEvents = makeset(iff(ResultType == 0, OriginalRequestId, ""), 5) 
          by 
          IPAddress, 
          UserPrincipalName, 
          bin(TimeGenerated, 1min), 
          UserAgent,
          ConditionalAccessStatus,
          OperationName,
          RiskDetail,
          AuthenticationRequirement,
          ClientAppUsed
      // Extracting the name and UPN suffix from UserPrincipalName
      | extend
          Name = tostring(split(UserPrincipalName, '@')[0]),
          UPNSuffix = tostring(split(UserPrincipalName, '@')[1])
      );
  // Join 'AwsAlert' and 'Azure_sigin' on the AWS Network Entity and Azure IP Address
  AwsAlert
  | join kind=inner Azure_sigin on $left.AWSNetworkEntity == $right.IPAddress

YAML

triggerThreshold: 0
entityMappings:
- entityType: IP
  fieldMappings:
  - identifier: Address
    columnName: IPAddress
- entityType: Account
  fieldMappings:
  - identifier: FullName
    columnName: UserPrincipalName
  - identifier: Name
    columnName: Name
  - identifier: UPNSuffix
    columnName: UPNSuffix
requiredDataConnectors:
- dataTypes:
  - SigninLogs
  connectorId: AzureActiveDirectory
- dataTypes:
  - AWSGuardDuty
  connectorId: AWSS3
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Multi Cloud Attack Coverage Essentials - Resource Abuse/Analytic Rules/CrossCloudUnauthorizedCredentialsAccessDetection.yaml
customDetails:
  AWSInstanceType: RDSactionType
  AzureClientAppUsed: ClientAppUsed
  AzureUser: UserPrincipalName
  AWSArn: Arn
  AzAuthRequirement: AuthenticationRequirement
  AzureUserAgent: UserAgent
  alertSeverity: Severity
  AzureRiskDetail: RiskDetail
  AWSresourceType: AWSresourceType
  AzureOperationName: OperationName
  AWSInstanceId: RDSInstanceId
  AzConditionalAccess: ConditionalAccessStatus
  AWSAlertUserName: RDSUser
  AWSAplicationName: RDSApplication
name: Cross-Cloud Unauthorized Credential Access Detection From AWS RDS Login
alertDetailsOverride:
  alertDisplayNameFormat: IP address {{IPAddress}} in {{AWSAlertTitle}} seen in Azure Signin Logs with {{UserPrincipalName}}
  alertSeverityColumnName: Severity
  alertDynamicProperties:
  - value: AWSAlertLink
    alertProperty: AlertLink
  - value: AWS
    alertProperty: ProviderName
  - value: AWSGuardDuty
    alertProperty: ProductName
  - value: AWSGuardDuty
    alertProperty: ProductComponentName
  alertDescriptionFormat: |-
    This detection correlates AWS GuardDuty Credential Access alert described '{{AWSAlertDescription}}' related to Amazon Relational Database Service (RDS) activity with Azure portal sign-in activities. It identifies successful and failed logins, anomalous behavior, and malicious IP access. By joining these datasets on network entities and IP addresses, it detects unauthorized credential access attempts across AWS and Azure resources, enhancing cross-cloud security monitoring. 

     AWS ALert Link : '{{AWSAlertLink}}' 

     Find More Details :https://docs.aws.amazon.com/guardduty/latest/ug/guardduty_finding-types-active.html    
relevantTechniques:
- T1557
- T1110
- T1110.003
- T1110.004
- T1606
- T1556
- T1133
query: |
  // Define variable 'AwsAlert' to collect AWS GuardDuty CredentialAccess alerts related to Amazon Relational Database Service (RDS) activity
  let AwsAlert = materialize (
      AWSGuardDuty
      | where ActivityType has_any (
          "CredentialAccess:RDS/TorIPCaller.SuccessfulLogin",
          "CredentialAccess:RDS/TorIPCaller.FailedLogin",
          "CredentialAccess:RDS/AnomalousBehavior.SuccessfulBruteForce",
          "CredentialAccess:RDS/AnomalousBehavior.SuccessfulLogin",
          "CredentialAccess:RDS/MaliciousIPCaller.SuccessfulLogin",
          "CredentialAccess:RDS/MaliciousIPCaller.FailedLogin"
          )
      | extend
          AWSAlertId = Id, 
          AWSAlertTitle = Title,
          AWSAlertDescription = Description,
          AWSresourceType = tostring(parse_json(ResourceDetails).resourceType),
          AWSNetworkEntity = tostring(parse_json(ServiceDetails).action.rdsLoginAttemptAction.remoteIpDetails.ipAddressV4),
          RDSInstanceId = tostring(parse_json(ResourceDetails).rdsDbInstanceDetails.dbInstanceIdentifier),
          RDSUser = tostring(parse_json(ResourceDetails).rdsDbUserDetails.user),
          RDSApplication = tostring(parse_json(ResourceDetails).rdsDbUserDetails.application),
          RDSactionType = tostring(parse_json(ServiceDetails).action.actionType),
          AWSAlertTime = TimeCreated,
          AWSAlertLink= tostring(strcat('https://us-east-1.console.aws.amazon.com/guardduty/home?region=us-east-1#/findings?macros=current&fId=',Id)),
          Severity = 
    case (
      Severity >= 7.0, "High",
      Severity between (4.0 .. 6.9), "Medium",
      Severity between (1.0 .. 3.9), "Low",
      "Unknown")
      | distinct
          AWSAlertTime,
          ActivityType,
          AWSAlertId,
          AWSAlertLink,
          AWSAlertTitle,
          AWSAlertDescription,
          AWSresourceType,
          Arn,
          Severity,
          RDSactionType,
          RDSApplication,
          RDSInstanceId,
          RDSUser,
          AWSNetworkEntity
      );
    // Define variable 'Azure_sigin' to collect Azure portal sign-in activities
    let Azure_sigin = materialize (
        SigninLogs
        | where AppDisplayName == "Azure Portal"
        | where isnotempty(OriginalRequestId)
        | summarize 
            AzureSuccessfulEvent = countif(ResultType == 0), 
            AzureFailedEvent = countif(ResultType != 0), 
            totalAzureLoginEventId = dcount(OriginalRequestId), 
            AzureFailedEventsCount = dcountif(OriginalRequestId, ResultType != 0), 
            AzureSuccessfuleventsCount = dcountif(OriginalRequestId, ResultType == 0),
            AzureSetOfFailedevents = makeset(iff(ResultType != 0, OriginalRequestId, ""), 5), 
            AzureSetOfSuccessfulEvents = makeset(iff(ResultType == 0, OriginalRequestId, ""), 5) 
            by 
            IPAddress, 
            UserPrincipalName, 
            bin(TimeGenerated, 1min), 
            UserAgent,
            ConditionalAccessStatus,
            OperationName,
            RiskDetail,
            AuthenticationRequirement,
            ClientAppUsed
        // Extracting the name and UPN suffix from UserPrincipalName
        | extend
            Name = tostring(split(UserPrincipalName, '@')[0]),
            UPNSuffix = tostring(split(UserPrincipalName, '@')[1])
        );
    // Join 'AwsAlert' and 'Azure_sigin' on the AWS Network Entity and Azure IP Address
    AwsAlert
    | join kind=inner Azure_sigin on $left.AWSNetworkEntity == $right.IPAddress  
version: 1.0.3
queryPeriod: 1d
kind: Scheduled
id: 122fbc6a-57ab-4aa7-b9a9-51ac4970cac1
description: |
    'This detection correlates AWS GuardDuty Credential Access alerts related to Amazon Relational Database Service (RDS) activity with Azure portal sign-in activities. It identifies successful and failed logins, anomalous behavior, and malicious IP access. By joining these datasets on network entities and IP addresses, it detects unauthorized credential access attempts across AWS and Azure resources, enhancing cross-cloud security monitoring.'
queryFrequency: 1d
severity: Medium
triggerOperator: gt
tactics:
- CredentialAccess
- InitialAccess

ARM