User IAM Enumeration

let threshold = 50; 
AWSCloudTrail
| where EventName in ("ListAttachedRolePolicies","ListRoles","ListGroupsForUser","ListAttachedUserPolicies","ListAccessKeys","ListUsers")
| summarize
    count(),
    make_set(AWSRegion),
    make_set(UserAgent),
    make_set(SourceIpAddress),
    make_set(ErrorCode),
    make_set(ErrorMessage),
    make_set(EventName)
    by bin(TimeGenerated, 10m), UserIdentityPrincipalid, UserIdentityArn, UserIdentityAccountId
| where count_ > threshold
| mv-expand set_SourceIpAddress
| extend UserName = substring(UserIdentityPrincipalid, indexof_regex(UserIdentityPrincipalid, ":") + 1)
| extend Name = split(UserName,'@')[0],UpnSuffix = split(UserName,'@')[1]

tactics:
- Discovery
name: User IAM Enumeration
id: cfaaf0bc-16d1-48df-ac8b-9d901bbd516a
requiredDataConnectors:
- connectorId: AWS
  dataTypes:
  - AWSCloudTrail
query: |
  let threshold = 50; 
  AWSCloudTrail
  | where EventName in ("ListAttachedRolePolicies","ListRoles","ListGroupsForUser","ListAttachedUserPolicies","ListAccessKeys","ListUsers")
  | summarize
      count(),
      make_set(AWSRegion),
      make_set(UserAgent),
      make_set(SourceIpAddress),
      make_set(ErrorCode),
      make_set(ErrorMessage),
      make_set(EventName)
      by bin(TimeGenerated, 10m), UserIdentityPrincipalid, UserIdentityArn, UserIdentityAccountId
  | where count_ > threshold
  | mv-expand set_SourceIpAddress
  | extend UserName = substring(UserIdentityPrincipalid, indexof_regex(UserIdentityPrincipalid, ":") + 1)
  | extend Name = split(UserName,'@')[0],UpnSuffix = split(UserName,'@')[1]  
relevantTechniques:
- T1580
description: |
    'Detects enumeration of accounts configuration via api call to list different instances and services within a short period of time. WL Scanner of Cloud Account such as Wiz and threshold can be adjusted'
triggerOperator: gt
queryPeriod: 10m
severity: Medium
entityMappings:
- fieldMappings:
  - identifier: Name
    columnName: Name
  - identifier: UPNSuffix
    columnName: UpnSuffix
  entityType: Account
- fieldMappings:
  - identifier: Address
    columnName: set_SourceIpAddress
  entityType: IP
version: 1.0.0
triggerThreshold: 0
kind: Scheduled
queryFrequency: 10m
status: Available
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Amazon Web Services/Analytic Rules/AWS_UserIAMEnumeration.yaml

{
  "$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/cfaaf0bc-16d1-48df-ac8b-9d901bbd516a')]",
      "kind": "Scheduled",
      "name": "[concat(parameters('workspace'),'/Microsoft.SecurityInsights/cfaaf0bc-16d1-48df-ac8b-9d901bbd516a')]",
      "properties": {
        "alertRuleTemplateName": "cfaaf0bc-16d1-48df-ac8b-9d901bbd516a",
        "customDetails": null,
        "description": "'Detects enumeration of accounts configuration via api call to list different instances and services within a short period of time. WL Scanner of Cloud Account such as Wiz and threshold can be adjusted'\n",
        "displayName": "User IAM Enumeration",
        "enabled": true,
        "entityMappings": [
          {
            "entityType": "Account",
            "fieldMappings": [
              {
                "columnName": "Name",
                "identifier": "Name"
              },
              {
                "columnName": "UpnSuffix",
                "identifier": "UPNSuffix"
              }
            ]
          },
          {
            "entityType": "IP",
            "fieldMappings": [
              {
                "columnName": "set_SourceIpAddress",
                "identifier": "Address"
              }
            ]
          }
        ],
        "OriginalUri": "https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Amazon Web Services/Analytic Rules/AWS_UserIAMEnumeration.yaml",
        "query": "let threshold = 50; \nAWSCloudTrail\n| where EventName in (\"ListAttachedRolePolicies\",\"ListRoles\",\"ListGroupsForUser\",\"ListAttachedUserPolicies\",\"ListAccessKeys\",\"ListUsers\")\n| summarize\n    count(),\n    make_set(AWSRegion),\n    make_set(UserAgent),\n    make_set(SourceIpAddress),\n    make_set(ErrorCode),\n    make_set(ErrorMessage),\n    make_set(EventName)\n    by bin(TimeGenerated, 10m), UserIdentityPrincipalid, UserIdentityArn, UserIdentityAccountId\n| where count_ > threshold\n| mv-expand set_SourceIpAddress\n| extend UserName = substring(UserIdentityPrincipalid, indexof_regex(UserIdentityPrincipalid, \":\") + 1)\n| extend Name = split(UserName,'@')[0],UpnSuffix = split(UserName,'@')[1]\n",
        "queryFrequency": "PT10M",
        "queryPeriod": "PT10M",
        "severity": "Medium",
        "status": "Available",
        "subTechniques": [],
        "suppressionDuration": "PT1H",
        "suppressionEnabled": false,
        "tactics": [
          "Discovery"
        ],
        "techniques": [
          "T1580"
        ],
        "templateVersion": "1.0.0",
        "triggerOperator": "GreaterThan",
        "triggerThreshold": 0
      },
      "type": "Microsoft.OperationalInsights/workspaces/providers/alertRules"
    }
  ]
}