AWSCloudTrail - Creation of Access Key for IAM User

AWSCloudTrail
| where EventName == "CreateAccessKey" 
| project-away SourceSystem,Category,Type,TenantId,EventVersion,SessionIssuerAccountId
| extend UserName = substring(UserIdentityPrincipalid, indexof_regex(UserIdentityPrincipalid, ":") + 1)
| extend Name = split(UserName,'@')[0],UpnSuffix = split(UserName,'@')[1]

entityMappings:
- entityType: Account
  fieldMappings:
  - columnName: Name
    identifier: Name
  - columnName: UpnSuffix
    identifier: UPNSuffix
- entityType: IP
  fieldMappings:
  - columnName: SourceIpAddress
    identifier: Address
query: |
  AWSCloudTrail
  | where EventName == "CreateAccessKey" 
  | project-away SourceSystem,Category,Type,TenantId,EventVersion,SessionIssuerAccountId
  | extend UserName = substring(UserIdentityPrincipalid, indexof_regex(UserIdentityPrincipalid, ":") + 1)
  | extend Name = split(UserName,'@')[0],UpnSuffix = split(UserName,'@')[1]
id: 9a6554e6-63d9-4f94-9b32-64d1d40628f2
queryFrequency: 15m
alertDetailsOverride:
  alertDisplayNameFormat: IAM access key created by {{Name}} in {{AWSRegion}}
  alertDescriptionFormat: User {{Name}} (principal {{UserIdentityPrincipalid}}) created a new IAM access key in region {{AWSRegion}}.
status: Available
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Amazon%20Web%20Services/Analytic%20Rules/AWS_UserAccessKeyCreated.yaml
version: 1.0.2
severity: Medium
relevantTechniques:
- T1098.001
name: AWSCloudTrail - Creation of Access Key for IAM User
kind: Scheduled
tactics:
- Persistence
requiredDataConnectors:
- dataTypes:
  - AWSCloudTrail
  connectorId: AWS
description: |
  Detects creation of a new IAM access key on an existing user account, which could be used to establish persistence. This action should be validated by the AWS account administrator. Reference: https://stratus-red-team.cloud/attack-techniques/AWS/aws.persistence.iam-backdoor-user/
customDetails:
  EventName: EventName
  UserAgent: UserAgent
  AWSRegion: AWSRegion
triggerOperator: gt
triggerThreshold: 0
queryPeriod: 15m

{
  "$schema": "https://schema.management.azure.com/schemas/2019-04-01/deploymentTemplate.json#",
  "contentVersion": "1.0.0.0",
  "parameters": {
    "workspace": {
      "type": "String"
    }
  },
  "resources": [
    {
      "apiVersion": "2024-01-01-preview",
      "id": "[concat(resourceId('Microsoft.OperationalInsights/workspaces/providers', parameters('workspace'), 'Microsoft.SecurityInsights'),'/alertRules/9a6554e6-63d9-4f94-9b32-64d1d40628f2')]",
      "kind": "Scheduled",
      "name": "[concat(parameters('workspace'),'/Microsoft.SecurityInsights/9a6554e6-63d9-4f94-9b32-64d1d40628f2')]",
      "properties": {
        "alertDetailsOverride": {
          "alertDescriptionFormat": "User {{Name}} (principal {{UserIdentityPrincipalid}}) created a new IAM access key in region {{AWSRegion}}.",
          "alertDisplayNameFormat": "IAM access key created by {{Name}} in {{AWSRegion}}"
        },
        "alertRuleTemplateName": "9a6554e6-63d9-4f94-9b32-64d1d40628f2",
        "customDetails": {
          "AWSRegion": "AWSRegion",
          "EventName": "EventName",
          "UserAgent": "UserAgent"
        },
        "description": "Detects creation of a new IAM access key on an existing user account, which could be used to establish persistence. This action should be validated by the AWS account administrator. Reference: https://stratus-red-team.cloud/attack-techniques/AWS/aws.persistence.iam-backdoor-user/\n",
        "displayName": "AWSCloudTrail - Creation of Access Key for IAM User",
        "enabled": true,
        "entityMappings": [
          {
            "entityType": "Account",
            "fieldMappings": [
              {
                "columnName": "Name",
                "identifier": "Name"
              },
              {
                "columnName": "UpnSuffix",
                "identifier": "UPNSuffix"
              }
            ]
          },
          {
            "entityType": "IP",
            "fieldMappings": [
              {
                "columnName": "SourceIpAddress",
                "identifier": "Address"
              }
            ]
          }
        ],
        "OriginalUri": "https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Amazon%20Web%20Services/Analytic%20Rules/AWS_UserAccessKeyCreated.yaml",
        "query": "AWSCloudTrail\n| where EventName == \"CreateAccessKey\" \n| project-away SourceSystem,Category,Type,TenantId,EventVersion,SessionIssuerAccountId\n| extend UserName = substring(UserIdentityPrincipalid, indexof_regex(UserIdentityPrincipalid, \":\") + 1)\n| extend Name = split(UserName,'@')[0],UpnSuffix = split(UserName,'@')[1]\n",
        "queryFrequency": "PT15M",
        "queryPeriod": "PT15M",
        "severity": "Medium",
        "status": "Available",
        "subTechniques": [
          "T1098.001"
        ],
        "suppressionDuration": "PT1H",
        "suppressionEnabled": false,
        "tactics": [
          "Persistence"
        ],
        "techniques": [
          "T1098"
        ],
        "templateVersion": "1.0.2",
        "triggerOperator": "GreaterThan",
        "triggerThreshold": 0
      },
      "type": "Microsoft.OperationalInsights/workspaces/providers/alertRules"
    }
  ]
}