Unauthorized user access across AWS and Azure

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Id	60f31001-018a-42bf-8045-a92e1f361b7b
Rulename	Unauthorized user access across AWS and Azure
Description	This detection compiles and correlates unauthorized user access alerts originating from AWS GuardDuty with Azure portal sign-in activities. It focuses on AWS GuardDuty alerts related to unauthorized user access, specifically targeting network IP associations tied to activities such as logins from malicious IP addresses or instance credential exfiltration attempts. The ditection leverages these common network IP advisories to detect and pinpoint unauthorized users attempting to access both AWS and Azure resources.
Severity	Medium
Tactics	CredentialAccess Exfiltration Discovery
Techniques	T1557 T1110 T1110.003 T1110.004 T1212 T1048 T1087 T1580
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/Unauthorized_user_access_across_AWS_and_Azure.yaml
Version	1.0.4
Arm template	60f31001-018a-42bf-8045-a92e1f361b7b.json

KQL

// Define a variable 'AwsAlert' to collect Unauthorized user access alerts from AWS GuardDuty table
let AwsAlert = materialize (
    AWSGuardDuty
    | where ActivityType has_any ("UnauthorizedAccess:IAMUser/TorIPCaller", "UnauthorizedAccess:IAMUser/MaliciousIPCaller.Custom", 
    "UnauthorizedAccess:IAMUser/InstanceCredentialExfiltration.OutsideAWS", "UnauthorizedAccess:IAMUser/InstanceCredentialExfiltration.InsideAWS",
    "UnauthorizedAccess:IAMUser/ConsoleLoginSuccess.B","UnauthorizedAccess:IAMUser/MaliciousIPCaller")
    | extend
        AWSAlertId = Id, 
        AWSAlertTitle = Title,
        AWSAlertDescription = Description,
        AWSresourceType = tostring(parse_json(ResourceDetails).resourceType),
        AWSNetworkEntity = tostring(parse_json(ServiceDetails).action.awsApiCallAction.remoteIpDetails.ipAddressV4),
        AWSAlertUserNameEntity = tostring(parse_json(ResourceDetails).accessKeyDetails.userName),
        InstanceType = tostring(parse_json(ResourceDetails).instanceDetails.instanceType),
        AWSTargetingService = parse_json(ServiceDetails).additionalInfo.apiCalls,
        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")
    | mv-apply AIPCall = AWSTargetingService on 
        ( 
        where AIPCall has "name"    
        | extend APICallName = tostring(AIPCall.name), APICallCount = tostring(AIPCall["count"])
        ) 
    | distinct
        AWSAlertTime,
        ActivityType,
        Severity,
        AWSAlertId,
        AWSAlertTitle,
        AWSAlertDescription,
        AWSAlertLink,
        Arn,
        AWSresourceType,
        AWSNetworkEntity,
        AWSAlertUserNameEntity,
        InstanceType,
        APICallName,
        APICallCount      
    );
    // Define a variable 'Azure_sigin' to collect Azure portal Signing activity from SigninLogs Table
    let Azure_sigin = materialize (SigninLogs
        | where AppDisplayName == "Azure Portal"
        | where isnotempty(OriginalRequestId)
        | summarize 
            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

severity: Medium
relevantTechniques:
- T1557
- T1110
- T1110.003
- T1110.004
- T1212
- T1048
- T1087
- T1580
customDetails:
  AzConditionalAccess: ConditionalAccessStatus
  AWSAPICallCount: APICallCount
  alertSeverity: Severity
  AzureUser: UserPrincipalName
  AzureUserAgent: UserAgent
  AzureOperationName: OperationName
  AWSArn: Arn
  AWSInstanceType: InstanceType
  AWSAPICallName: APICallName
  AzureClientAppUsed: ClientAppUsed
  AzAuthRequirement: AuthenticationRequirement
  AzureRiskDetail: RiskDetail
  AWSresourceType: AWSresourceType
  AWSAlertUserName: AWSAlertUserNameEntity
queryFrequency: 1d
kind: Scheduled
version: 1.0.4
triggerOperator: gt
description: |
    'This detection compiles and correlates unauthorized user access alerts originating from AWS GuardDuty with Azure portal sign-in activities. It focuses on AWS GuardDuty alerts related to unauthorized user access, specifically targeting network IP associations tied to activities such as logins from malicious IP addresses or instance credential exfiltration attempts. The ditection leverages these common network IP advisories to detect and pinpoint unauthorized users attempting to access both AWS and Azure resources.'
queryPeriod: 1d
id: 60f31001-018a-42bf-8045-a92e1f361b7b
alertDetailsOverride:
  alertSeverityColumnName: Severity
  alertDynamicProperties:
  - alertProperty: AlertLink
    value: AWSAlertLink
  - alertProperty: ProviderName
    value: AWS
  - alertProperty: ProductName
    value: AWSGuardDuty
  - alertProperty: ProductComponentName
    value: AWSGuardDuty
  alertDisplayNameFormat: '{{AWSNetworkEntity}} from {{AWSAlertTitle}} observed in Azure Singins with {{UserPrincipalName}}'
  alertDescriptionFormat: |2-
      This detection compiles and correlates unauthorized user access alerts originating from AWS GuardDuty With Alert Description '{{AWSAlertDescription}}' with Azure portal sign-in activities. It focuses on AWS GuardDuty alerts related to unauthorized user access, specifically targeting network IP associations tied to activities such as logins from malicious IP addresses or instance credential exfiltration attempts. The detection leverages these common network IP advisories to detect and pinpoint unauthorized users attempting to access both AWS and Azure resources.  

     AWS ALert Link : '{{AWSAlertLink}}' 

     Find More Details :https://docs.aws.amazon.com/guardduty/latest/ug/guardduty_finding-types-active.html
entityMappings:
- entityType: IP
  fieldMappings:
  - columnName: IPAddress
    identifier: Address
- entityType: Account
  fieldMappings:
  - columnName: UserPrincipalName
    identifier: FullName
  - columnName: Name
    identifier: Name
  - columnName: UPNSuffix
    identifier: UPNSuffix
tactics:
- CredentialAccess
- Exfiltration
- Discovery
name: Unauthorized user access across AWS and Azure
triggerThreshold: 0
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Multi Cloud Attack Coverage Essentials - Resource Abuse/Analytic Rules/Unauthorized_user_access_across_AWS_and_Azure.yaml
query: |
  // Define a variable 'AwsAlert' to collect Unauthorized user access alerts from AWS GuardDuty table
  let AwsAlert = materialize (
      AWSGuardDuty
      | where ActivityType has_any ("UnauthorizedAccess:IAMUser/TorIPCaller", "UnauthorizedAccess:IAMUser/MaliciousIPCaller.Custom", 
      "UnauthorizedAccess:IAMUser/InstanceCredentialExfiltration.OutsideAWS", "UnauthorizedAccess:IAMUser/InstanceCredentialExfiltration.InsideAWS",
      "UnauthorizedAccess:IAMUser/ConsoleLoginSuccess.B","UnauthorizedAccess:IAMUser/MaliciousIPCaller")
      | extend
          AWSAlertId = Id, 
          AWSAlertTitle = Title,
          AWSAlertDescription = Description,
          AWSresourceType = tostring(parse_json(ResourceDetails).resourceType),
          AWSNetworkEntity = tostring(parse_json(ServiceDetails).action.awsApiCallAction.remoteIpDetails.ipAddressV4),
          AWSAlertUserNameEntity = tostring(parse_json(ResourceDetails).accessKeyDetails.userName),
          InstanceType = tostring(parse_json(ResourceDetails).instanceDetails.instanceType),
          AWSTargetingService = parse_json(ServiceDetails).additionalInfo.apiCalls,
          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")
      | mv-apply AIPCall = AWSTargetingService on 
          ( 
          where AIPCall has "name"    
          | extend APICallName = tostring(AIPCall.name), APICallCount = tostring(AIPCall["count"])
          ) 
      | distinct
          AWSAlertTime,
          ActivityType,
          Severity,
          AWSAlertId,
          AWSAlertTitle,
          AWSAlertDescription,
          AWSAlertLink,
          Arn,
          AWSresourceType,
          AWSNetworkEntity,
          AWSAlertUserNameEntity,
          InstanceType,
          APICallName,
          APICallCount      
      );
      // Define a variable 'Azure_sigin' to collect Azure portal Signing activity from SigninLogs Table
      let Azure_sigin = materialize (SigninLogs
          | where AppDisplayName == "Azure Portal"
          | where isnotempty(OriginalRequestId)
          | summarize 
              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  
requiredDataConnectors:
- dataTypes:
  - SigninLogs
  connectorId: AzureActiveDirectory
- dataTypes:
  - AWSGuardDuty
  connectorId: AWSS3

ARM

{
  "$schema": "https://schema.management.azure.com/schemas/2019-04-01/deploymentTemplate.json#",
  "contentVersion": "1.0.0.0",
  "parameters": {
    "workspace": {
      "type": "String"
    }
  },
  "resources": [
    {
      "apiVersion": "2023-02-01-preview",
      "id": "[concat(resourceId('Microsoft.OperationalInsights/workspaces/providers', parameters('workspace'), 'Microsoft.SecurityInsights'),'/alertRules/60f31001-018a-42bf-8045-a92e1f361b7b')]",
      "kind": "Scheduled",
      "name": "[concat(parameters('workspace'),'/Microsoft.SecurityInsights/60f31001-018a-42bf-8045-a92e1f361b7b')]",
      "properties": {
        "alertDetailsOverride": {
          "alertDescriptionFormat": "  This detection compiles and correlates unauthorized user access alerts originating from AWS GuardDuty With Alert Description '{{AWSAlertDescription}}' with Azure portal sign-in activities. It focuses on AWS GuardDuty alerts related to unauthorized user access, specifically targeting network IP associations tied to activities such as logins from malicious IP addresses or instance credential exfiltration attempts. The detection leverages these common network IP advisories to detect and pinpoint unauthorized users attempting to access both AWS and Azure resources.  \n\n AWS ALert Link : '{{AWSAlertLink}}' \n\n Find More Details :https://docs.aws.amazon.com/guardduty/latest/ug/guardduty_finding-types-active.html",
          "alertDisplayNameFormat": "{{AWSNetworkEntity}} from {{AWSAlertTitle}} observed in Azure Singins with {{UserPrincipalName}}",
          "alertDynamicProperties": [
            {
              "alertProperty": "AlertLink",
              "value": "AWSAlertLink"
            },
            {
              "alertProperty": "ProviderName",
              "value": "AWS"
            },
            {
              "alertProperty": "ProductName",
              "value": "AWSGuardDuty"
            },
            {
              "alertProperty": "ProductComponentName",
              "value": "AWSGuardDuty"
            }
          ],
          "alertSeverityColumnName": "Severity"
        },
        "alertRuleTemplateName": "60f31001-018a-42bf-8045-a92e1f361b7b",
        "customDetails": {
          "alertSeverity": "Severity",
          "AWSAlertUserName": "AWSAlertUserNameEntity",
          "AWSAPICallCount": "APICallCount",
          "AWSAPICallName": "APICallName",
          "AWSArn": "Arn",
          "AWSInstanceType": "InstanceType",
          "AWSresourceType": "AWSresourceType",
          "AzAuthRequirement": "AuthenticationRequirement",
          "AzConditionalAccess": "ConditionalAccessStatus",
          "AzureClientAppUsed": "ClientAppUsed",
          "AzureOperationName": "OperationName",
          "AzureRiskDetail": "RiskDetail",
          "AzureUser": "UserPrincipalName",
          "AzureUserAgent": "UserAgent"
        },
        "description": "'This detection compiles and correlates unauthorized user access alerts originating from AWS GuardDuty with Azure portal sign-in activities. It focuses on AWS GuardDuty alerts related to unauthorized user access, specifically targeting network IP associations tied to activities such as logins from malicious IP addresses or instance credential exfiltration attempts. The ditection leverages these common network IP advisories to detect and pinpoint unauthorized users attempting to access both AWS and Azure resources.'\n",
        "displayName": "Unauthorized user access across AWS and Azure",
        "enabled": true,
        "entityMappings": [
          {
            "entityType": "IP",
            "fieldMappings": [
              {
                "columnName": "IPAddress",
                "identifier": "Address"
              }
            ]
          },
          {
            "entityType": "Account",
            "fieldMappings": [
              {
                "columnName": "UserPrincipalName",
                "identifier": "FullName"
              },
              {
                "columnName": "Name",
                "identifier": "Name"
              },
              {
                "columnName": "UPNSuffix",
                "identifier": "UPNSuffix"
              }
            ]
          }
        ],
        "OriginalUri": "https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Multi Cloud Attack Coverage Essentials - Resource Abuse/Analytic Rules/Unauthorized_user_access_across_AWS_and_Azure.yaml",
        "query": "// Define a variable 'AwsAlert' to collect Unauthorized user access alerts from AWS GuardDuty table\nlet AwsAlert = materialize (\n    AWSGuardDuty\n    | where ActivityType has_any (\"UnauthorizedAccess:IAMUser/TorIPCaller\", \"UnauthorizedAccess:IAMUser/MaliciousIPCaller.Custom\", \n    \"UnauthorizedAccess:IAMUser/InstanceCredentialExfiltration.OutsideAWS\", \"UnauthorizedAccess:IAMUser/InstanceCredentialExfiltration.InsideAWS\",\n    \"UnauthorizedAccess:IAMUser/ConsoleLoginSuccess.B\",\"UnauthorizedAccess:IAMUser/MaliciousIPCaller\")\n    | extend\n        AWSAlertId = Id, \n        AWSAlertTitle = Title,\n        AWSAlertDescription = Description,\n        AWSresourceType = tostring(parse_json(ResourceDetails).resourceType),\n        AWSNetworkEntity = tostring(parse_json(ServiceDetails).action.awsApiCallAction.remoteIpDetails.ipAddressV4),\n        AWSAlertUserNameEntity = tostring(parse_json(ResourceDetails).accessKeyDetails.userName),\n        InstanceType = tostring(parse_json(ResourceDetails).instanceDetails.instanceType),\n        AWSTargetingService = parse_json(ServiceDetails).additionalInfo.apiCalls,\n        AWSAlertTime = TimeCreated,\n        AWSAlertLink= tostring(strcat('https://us-east-1.console.aws.amazon.com/guardduty/home?region=us-east-1#/findings?macros=current&fId=',Id)),\n        Severity = \n  case (\n    Severity >= 7.0, \"High\",\n    Severity between (4.0 .. 6.9), \"Medium\",\n    Severity between (1.0 .. 3.9), \"Low\",\n    \"Unknown\")\n    | mv-apply AIPCall = AWSTargetingService on \n        ( \n        where AIPCall has \"name\"    \n        | extend APICallName = tostring(AIPCall.name), APICallCount = tostring(AIPCall[\"count\"])\n        ) \n    | distinct\n        AWSAlertTime,\n        ActivityType,\n        Severity,\n        AWSAlertId,\n        AWSAlertTitle,\n        AWSAlertDescription,\n        AWSAlertLink,\n        Arn,\n        AWSresourceType,\n        AWSNetworkEntity,\n        AWSAlertUserNameEntity,\n        InstanceType,\n        APICallName,\n        APICallCount      \n    );\n    // Define a variable 'Azure_sigin' to collect Azure portal Signing activity from SigninLogs Table\n    let Azure_sigin = materialize (SigninLogs\n        | where AppDisplayName == \"Azure Portal\"\n        | where isnotempty(OriginalRequestId)\n        | summarize \n            totalAzureLoginEventId = dcount(OriginalRequestId), \n            AzureFailedEventsCount = dcountif(OriginalRequestId, ResultType != 0), \n            AzureSuccessfulEventsCount = dcountif(OriginalRequestId, ResultType == 0),\n            AzureSetOfFailedEvents = makeset(iff(ResultType != 0, OriginalRequestId, \"\"), 5), \n            AzureSetOfSuccessfulEvents = makeset(iff(ResultType == 0, OriginalRequestId, \"\"), 5) \n        by \n            IPAddress, \n            UserPrincipalName, \n            bin(TimeGenerated, 1min), \n            UserAgent,\n            ConditionalAccessStatus,\n            OperationName,\n            RiskDetail,\n            AuthenticationRequirement,\n            ClientAppUsed \n        // Extracting the name and UPN suffix from UserPrincipalName\n        | extend\n            Name = tostring(split(UserPrincipalName, \"@\")[0]),\n            UPNSuffix = tostring(split(UserPrincipalName, \"@\")[1])\n    );\n    // Join 'AwsAlert' and 'Azure_sigin' on the AWS Network Entity and Azure IP Address\n    AwsAlert\n    | join kind=inner Azure_sigin on $left.AWSNetworkEntity == $right.IPAddress\n",
        "queryFrequency": "P1D",
        "queryPeriod": "P1D",
        "severity": "Medium",
        "suppressionDuration": "PT1H",
        "suppressionEnabled": false,
        "tactics": [
          "CredentialAccess",
          "Discovery",
          "Exfiltration"
        ],
        "techniques": [
          "T1048",
          "T1087",
          "T1110",
          "T1212",
          "T1557",
          "T1580"
        ],
        "templateVersion": "1.0.4",
        "triggerOperator": "GreaterThan",
        "triggerThreshold": 0
      },
      "type": "Microsoft.OperationalInsights/workspaces/providers/alertRules"
    }
  ]
}