Privilege escalation via EC2 policy

AWSCloudTrail
  | where EventName in ("PutUserPolicy","PutRolePolicy","PutGroupPolicy") and isempty(ErrorCode) and isempty(ErrorMessage)
  | extend PolicyName = tostring(parse_json(RequestParameters).policyName)
  | extend Statement = parse_json(tostring((parse_json(RequestParameters).policyDocument))).Statement
  | mvexpand Statement
  | extend Action = parse_json(Statement).Action , Effect = tostring(parse_json(Statement).Effect), Resource = tostring(parse_json(Statement).Resource), Condition = tostring(parse_json(Statement).Condition)
  | extend Action = tostring(Action)
  | where Effect =~ "Allow" and ((((Action contains "iam:*" or Action contains "iam:PassRole") and Action contains "ec2:*") or ((Action contains "iam:*" or Action contains "iam:PassRole") and Action contains "ec2:RunInstances") or ((Action contains "iam:*" or Action contains "iam:PassRole") and Action contains "ec2:Run*")) or (Action contains "ec2:*") or (Action contains "ec2:ListInstances" and Action contains "ec2:StartInstance" and Action contains "ec2:ModifyInstanceAttribute") or (Action contains "ec2:List*" and Action contains "ec2:Start*" and Action contains "ec2:Modify*")) and Resource == "*" and Condition == ""
  | distinct TimeGenerated, EventName, PolicyName, SourceIpAddress, UserIdentityArn, UserIdentityUserName
  | extend UserIdentityUserName = iff(isnotempty(UserIdentityUserName), UserIdentityUserName, tostring(split(UserIdentityArn,'/')[-1]))
  | extend timestamp = TimeGenerated, IPCustomEntity = SourceIpAddress, AccountCustomEntity = UserIdentityUserName

severity: Medium
queryFrequency: 1d
relevantTechniques:
- T1484
tactics:
- PrivilegeEscalation
kind: Scheduled
query: |
  AWSCloudTrail
    | where EventName in ("PutUserPolicy","PutRolePolicy","PutGroupPolicy") and isempty(ErrorCode) and isempty(ErrorMessage)
    | extend PolicyName = tostring(parse_json(RequestParameters).policyName)
    | extend Statement = parse_json(tostring((parse_json(RequestParameters).policyDocument))).Statement
    | mvexpand Statement
    | extend Action = parse_json(Statement).Action , Effect = tostring(parse_json(Statement).Effect), Resource = tostring(parse_json(Statement).Resource), Condition = tostring(parse_json(Statement).Condition)
    | extend Action = tostring(Action)
    | where Effect =~ "Allow" and ((((Action contains "iam:*" or Action contains "iam:PassRole") and Action contains "ec2:*") or ((Action contains "iam:*" or Action contains "iam:PassRole") and Action contains "ec2:RunInstances") or ((Action contains "iam:*" or Action contains "iam:PassRole") and Action contains "ec2:Run*")) or (Action contains "ec2:*") or (Action contains "ec2:ListInstances" and Action contains "ec2:StartInstance" and Action contains "ec2:ModifyInstanceAttribute") or (Action contains "ec2:List*" and Action contains "ec2:Start*" and Action contains "ec2:Modify*")) and Resource == "*" and Condition == ""
    | distinct TimeGenerated, EventName, PolicyName, SourceIpAddress, UserIdentityArn, UserIdentityUserName
    | extend UserIdentityUserName = iff(isnotempty(UserIdentityUserName), UserIdentityUserName, tostring(split(UserIdentityArn,'/')[-1]))
    | extend timestamp = TimeGenerated, IPCustomEntity = SourceIpAddress, AccountCustomEntity = UserIdentityUserName  
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Amazon Web Services/Analytic Rules/AWS_PrivilegeEscalationViaEC2Policy.yaml
queryPeriod: 1d
status: Available
version: 1.0.0
name: Privilege escalation via EC2 policy
requiredDataConnectors:
- dataTypes:
  - AWSCloudTrail
  connectorId: AWS
triggerOperator: gt
entityMappings:
- entityType: Account
  fieldMappings:
  - identifier: FullName
    columnName: AccountCustomEntity
- entityType: IP
  fieldMappings:
  - identifier: Address
    columnName: IPCustomEntity
id: a2b2a984-c820-4d93-830e-139bffd81fa3
description: |
    'Detected usage of AttachUserPolicy/AttachGroupPolicy/AttachRolePolicy on EC2 policy. Attackers could use these operations for privilege escalation. Verify these actions with the user.'
triggerThreshold: 0

{
  "$schema": "https://schema.management.azure.com/schemas/2019-04-01/deploymentTemplate.json#",
  "contentVersion": "1.0.0.0",
  "parameters": {
    "workspace": {
      "type": "String"
    }
  },
  "resources": [
    {
      "id": "[concat(resourceId('Microsoft.OperationalInsights/workspaces/providers', parameters('workspace'), 'Microsoft.SecurityInsights'),'/alertRules/a2b2a984-c820-4d93-830e-139bffd81fa3')]",
      "name": "[concat(parameters('workspace'),'/Microsoft.SecurityInsights/a2b2a984-c820-4d93-830e-139bffd81fa3')]",
      "type": "Microsoft.OperationalInsights/workspaces/providers/alertRules",
      "kind": "Scheduled",
      "apiVersion": "2022-11-01-preview",
      "properties": {
        "displayName": "Privilege escalation via EC2 policy",
        "description": "'Detected usage of AttachUserPolicy/AttachGroupPolicy/AttachRolePolicy on EC2 policy. Attackers could use these operations for privilege escalation. Verify these actions with the user.'\n",
        "severity": "Medium",
        "enabled": true,
        "query": "AWSCloudTrail\n  | where EventName in (\"PutUserPolicy\",\"PutRolePolicy\",\"PutGroupPolicy\") and isempty(ErrorCode) and isempty(ErrorMessage)\n  | extend PolicyName = tostring(parse_json(RequestParameters).policyName)\n  | extend Statement = parse_json(tostring((parse_json(RequestParameters).policyDocument))).Statement\n  | mvexpand Statement\n  | extend Action = parse_json(Statement).Action , Effect = tostring(parse_json(Statement).Effect), Resource = tostring(parse_json(Statement).Resource), Condition = tostring(parse_json(Statement).Condition)\n  | extend Action = tostring(Action)\n  | where Effect =~ \"Allow\" and ((((Action contains \"iam:*\" or Action contains \"iam:PassRole\") and Action contains \"ec2:*\") or ((Action contains \"iam:*\" or Action contains \"iam:PassRole\") and Action contains \"ec2:RunInstances\") or ((Action contains \"iam:*\" or Action contains \"iam:PassRole\") and Action contains \"ec2:Run*\")) or (Action contains \"ec2:*\") or (Action contains \"ec2:ListInstances\" and Action contains \"ec2:StartInstance\" and Action contains \"ec2:ModifyInstanceAttribute\") or (Action contains \"ec2:List*\" and Action contains \"ec2:Start*\" and Action contains \"ec2:Modify*\")) and Resource == \"*\" and Condition == \"\"\n  | distinct TimeGenerated, EventName, PolicyName, SourceIpAddress, UserIdentityArn, UserIdentityUserName\n  | extend UserIdentityUserName = iff(isnotempty(UserIdentityUserName), UserIdentityUserName, tostring(split(UserIdentityArn,'/')[-1]))\n  | extend timestamp = TimeGenerated, IPCustomEntity = SourceIpAddress, AccountCustomEntity = UserIdentityUserName\n",
        "queryFrequency": "P1D",
        "queryPeriod": "P1D",
        "triggerOperator": "GreaterThan",
        "triggerThreshold": 0,
        "suppressionDuration": "PT1H",
        "suppressionEnabled": false,
        "tactics": [
          "PrivilegeEscalation"
        ],
        "techniques": [
          "T1484"
        ],
        "alertRuleTemplateName": "a2b2a984-c820-4d93-830e-139bffd81fa3",
        "customDetails": null,
        "entityMappings": [
          {
            "fieldMappings": [
              {
                "columnName": "AccountCustomEntity",
                "identifier": "FullName"
              }
            ],
            "entityType": "Account"
          },
          {
            "fieldMappings": [
              {
                "columnName": "IPCustomEntity",
                "identifier": "Address"
              }
            ],
            "entityType": "IP"
          }
        ],
        "templateVersion": "1.0.0",
        "status": "Available",
        "OriginalUri": "https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Amazon Web Services/Analytic Rules/AWS_PrivilegeEscalationViaEC2Policy.yaml"
      }
    }
  ]
}