Unauthorized EC2 Instance Setup Attempt

AWSCloudTrail
| where EventName == "RunInstances"
| where ErrorCode == "Client.UnauthorizedOperation"
| project TimeGenerated, AwsEventId, EventTypeName, UserIdentityPrincipalid, UserIdentityType,  UserIdentityAccountId, SessionMfaAuthenticated, SessionCreationDate, SessionIssuerUserName, SourceIpAddress, AWSRegion, UserAgent, RequestParameters, ErrorMessage
| extend UserName = substring(UserIdentityPrincipalid, indexof_regex(UserIdentityPrincipalid, ":") + 1)
| extend Name = split(UserName,'@')[0],UpnSuffix = split(UserName,'@')[1]

status: Available
queryPeriod: 10m
version: 1.0.0
id: f7210a45-12a4-4d02-b59e-f23476827a4b
tactics:
- ResourceDevelopment
description: |
    'A User without access tried to Run an Instance. It might be to launch a malicious Instance in AWS subscription. Ref: https://stratus-red-team.cloud/attack-techniques/AWS/aws.execution.ec2-launch-unusual-instances/'
queryFrequency: 10m
triggerThreshold: 0
name: Unauthorized EC2 Instance Setup Attempt
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Amazon Web Services/Analytic Rules/AWS_UnauthorizedInstanceSetUpAttempt.yaml
query: |
  AWSCloudTrail
  | where EventName == "RunInstances"
  | where ErrorCode == "Client.UnauthorizedOperation"
  | project TimeGenerated, AwsEventId, EventTypeName, UserIdentityPrincipalid, UserIdentityType,  UserIdentityAccountId, SessionMfaAuthenticated, SessionCreationDate, SessionIssuerUserName, SourceIpAddress, AWSRegion, UserAgent, RequestParameters, ErrorMessage
  | extend UserName = substring(UserIdentityPrincipalid, indexof_regex(UserIdentityPrincipalid, ":") + 1)
  | extend Name = split(UserName,'@')[0],UpnSuffix = split(UserName,'@')[1]  
kind: Scheduled
severity: Medium
entityMappings:
- fieldMappings:
  - columnName: Name
    identifier: Name
  - columnName: UpnSuffix
    identifier: UPNSuffix
  entityType: Account
- fieldMappings:
  - columnName: SourceIpAddress
    identifier: Address
  entityType: IP
relevantTechniques:
- T1583
requiredDataConnectors:
- connectorId: AWS
  dataTypes:
  - AWSCloudTrail
triggerOperator: gt

{
  "$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/f7210a45-12a4-4d02-b59e-f23476827a4b')]",
      "kind": "Scheduled",
      "name": "[concat(parameters('workspace'),'/Microsoft.SecurityInsights/f7210a45-12a4-4d02-b59e-f23476827a4b')]",
      "properties": {
        "alertRuleTemplateName": "f7210a45-12a4-4d02-b59e-f23476827a4b",
        "customDetails": null,
        "description": "'A User without access tried to Run an Instance. It might be to launch a malicious Instance in AWS subscription. Ref: https://stratus-red-team.cloud/attack-techniques/AWS/aws.execution.ec2-launch-unusual-instances/'\n",
        "displayName": "Unauthorized EC2 Instance Setup Attempt",
        "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_UnauthorizedInstanceSetUpAttempt.yaml",
        "query": "AWSCloudTrail\n| where EventName == \"RunInstances\"\n| where ErrorCode == \"Client.UnauthorizedOperation\"\n| project TimeGenerated, AwsEventId, EventTypeName, UserIdentityPrincipalid, UserIdentityType,  UserIdentityAccountId, SessionMfaAuthenticated, SessionCreationDate, SessionIssuerUserName, SourceIpAddress, AWSRegion, UserAgent, RequestParameters, ErrorMessage\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": [
          "ResourceDevelopment"
        ],
        "techniques": [
          "T1583"
        ],
        "templateVersion": "1.0.0",
        "triggerOperator": "GreaterThan",
        "triggerThreshold": 0
      },
      "type": "Microsoft.OperationalInsights/workspaces/providers/alertRules"
    }
  ]
}