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]

triggerThreshold: 0
entityMappings:
- entityType: Account
  fieldMappings:
  - columnName: Name
    identifier: Name
  - columnName: UpnSuffix
    identifier: UPNSuffix
- entityType: IP
  fieldMappings:
  - columnName: SourceIpAddress
    identifier: Address
kind: Scheduled
requiredDataConnectors:
- dataTypes:
  - AWSCloudTrail
  connectorId: AWS
queryPeriod: 15m
id: 9a6554e6-63d9-4f94-9b32-64d1d40628f2
relevantTechniques:
- T1098
triggerOperator: gt
name: Creation of Access Key for IAM User
description: |
    'Establishes persistence by creating an access key on an existing IAM user. This type of action should be validated by Account Admin of AWS Account. Ref : https://stratus-red-team.cloud/attack-techniques/AWS/aws.persistence.iam-backdoor-user/'
status: Available
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]  
version: 1.0.1
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Amazon Web Services/Analytic Rules/AWS_UserAccessKeyCreated.yaml
severity: Medium
queryFrequency: 15m
tactics:
- Persistence

{
  "$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": {
        "alertRuleTemplateName": "9a6554e6-63d9-4f94-9b32-64d1d40628f2",
        "customDetails": null,
        "description": "'Establishes persistence by creating an access key on an existing IAM user. This type of action should be validated by Account Admin of AWS Account. Ref : https://stratus-red-team.cloud/attack-techniques/AWS/aws.persistence.iam-backdoor-user/'\n",
        "displayName": "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 Web Services/Analytic Rules/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": [],
        "suppressionDuration": "PT1H",
        "suppressionEnabled": false,
        "tactics": [
          "Persistence"
        ],
        "techniques": [
          "T1098"
        ],
        "templateVersion": "1.0.1",
        "triggerOperator": "GreaterThan",
        "triggerThreshold": 0
      },
      "type": "Microsoft.OperationalInsights/workspaces/providers/alertRules"
    }
  ]
}