持續性：將敏感角色授予外部 AI 代理

本文說明 Security Command Center 中的威脅發現項目類型。威脅偵測工具偵測到雲端資源中可能存在威脅時，就會產生威脅發現項目。如需可用威脅發現項目的完整清單，請參閱威脅發現項目索引。

總覽

外部機構的 AI 代理獲得敏感的 IAM 角色。對於中等敏感度角色，發現項目會分類為中等嚴重程度；對於高敏感度角色，則會分類為高等嚴重程度。詳情請參閱「AI 的私密 IAM 角色和權限」。

Event Threat Detection 是這項發現項目的來源。

回應方式

如要回應這項發現項目，請按照下列步驟操作：

步驟 1：查看調查結果詳細資料

  1. 按照「查看發現項目」一文的指示，開啟 Persistence: Sensitive Role Granted to External AI Agent 發現項目。系統會開啟發現項目的詳細資料面板，並顯示「摘要」分頁。

  2. 在「摘要」分頁中，查看下列各節的資訊：

    • 偵測到的內容，尤其是下列欄位：
      • 主體電子郵件地址：指派角色的使用者或服務帳戶的電子郵件地址。
      • 違規存取權授予項目：新增的機密角色詳細資料。

    • 受影響的資源

    • 相關連結，尤其是下列欄位：

      • Cloud Logging URI：記錄項目連結。
      • MITRE ATT&CK 方法：連結至 MITRE ATT&CK 文件。

步驟 2：檢查記錄

  1. 在發現項目詳細資料面板的「摘要」分頁中，按一下「Cloud Logging URI」連結，開啟「Logs Explorer」。
  2. 在隨即載入的頁面中，使用下列篩選器尋找新的或更新的 IAM 資源：
    • protoPayload.methodName="SetIamPolicy"

步驟 3：研究攻擊和回應方法

  1. 查看這類發現項目的 MITRE ATT&CK 框架項目： 有效帳戶：雲端帳戶。
  2. 如要制定回應計畫，請將調查結果與 MITRE 研究結合。

步驟 4：實作回應

下列應變計畫可能適用於這項發現，但也可能影響作業。 請仔細評估調查期間收集到的資訊，找出解決問題的最佳方式。

  • 請與遭盜用的帳戶的專案擁有者聯絡。
  • 刪除遭入侵的服務帳戶，並輪替及刪除遭入侵專案的所有服務帳戶存取金鑰。刪除後，使用該服務帳戶進行驗證的資源將無法存取。
  • 刪除未經授權帳戶建立的專案資源，例如不熟悉的 Compute Engine 執行個體、快照、服務帳戶和 IAM 使用者。
  • 如要限制新增外部使用者，請使用機構政策。

發現項目 JSON 範例

以下是發現項目 JSON 的範例，省略了預設值。

{
  "finding": {
    "name": "organizations/ORGANIZATION_ID/sources/SOURCE_ID/locations/global/findings/FINDING_ID",
    "parent": "organizations/ORGANIZATION_ID/sources/SOURCE_ID/locations/global",
    "resourceName": "//cloudresourcemanager.googleapis.com/projects/PROJECT_NUMBER",
    "state": "ACTIVE",
    "category": "Persistence: Sensitive Role Granted to External AI Agent",
    "securityMarks": {
      "name": "organizations/ORGANIZATION_ID/sources/SOURCE_ID/locations/global/findings/FINDING_ID/securityMarks"
    },
    "eventTime": "TIMESTAMP",
    "createTime": "TIMESTAMP",
    "severity": "HIGH",
    "canonicalName": "projects/PROJECT_NUMBER/sources/SOURCE_ID/locations/global/findings/FINDING_ID",
    "findingClass": "THREAT",
    "access": {
      "principalEmail": "PRINCIPAL_EMAIL",
      "userAgent": "USER_AGENT",
      "serviceName": "cloudresourcemanager.googleapis.com",
      "methodName": "SetIamPolicy",
      "principalSubject": "user:PRINCIPAL_EMAIL"
    },
    "mitreAttack": {
      "primaryTactic": "PERSISTENCE",
      "primaryTechniques": [
        "ACCOUNT_MANIPULATION"
      ],
      "additionalTactics": [
        "PRIVILEGE_ESCALATION"
      ],
      "additionalTechniques": [
        "ADDITIONAL_CLOUD_ROLES"
      ]
    },
    "iamBindings": [
      {
        "action": "ADD",
        "role": "roles/editor",
        "member": "principalSet://agents-nonprod.global.org-PROJECT_NUMBER.system.id.goog/*"
      },
      {
        "action": "ADD",
        "role": "roles/editor",
        "member": "principalSet://agents.global.org-PROJECT_NUMBER.system.id.goog/*"
      }
    ],
    "parentDisplayName": "Event Threat Detection",
    "domains": [
      {
        "category": "AI"
      },
      {
        "category": "IDENTITY_AND_ACCESS"
      }
    ],
    "logEntries": [
      {
        "cloudLoggingEntry": {
          "insertId": "INSERT_ID",
          "logId": "cloudaudit.googleapis.com/activity",
          "resourceContainer": "projects/PROJECT_ID",
          "timestamp": "TIMESTAMP"
        }
      }
    ]
  },
  "resource": {
    "name": "//cloudresourcemanager.googleapis.com/projects/PROJECT_NUMBER",
    "displayName": "PROJECT_ID",
    "type": "google.cloud.resourcemanager.Project",
    "cloudProvider": "GOOGLE_CLOUD_PLATFORM",
    "service": "cloudresourcemanager.googleapis.com",
    "gcpMetadata": {
      "project": "//cloudresourcemanager.googleapis.com/projects/PROJECT_NUMBER",
      "projectDisplayName": "PROJECT_ID",
      "parent": "//cloudresourcemanager.googleapis.com/folders/FOLDER_ID",
      "parentDisplayName": "FOLDER_NAME",
      "folders": [
        {
          "resourceFolder": "//cloudresourcemanager.googleapis.com/folders/FOLDER_ID",
          "resourceFolderDisplayName": "FOLDER_NAME"
        }
      ],
      "organization": "organizations/ORGANIZATION_ID"
    },
    "resourcePath": {
      "nodes": [
        {
          "nodeType": "GCP_PROJECT",
          "id": "projects/PROJECT_NUMBER",
          "displayName": "PROJECT_ID"
        },
        {
          "nodeType": "GCP_FOLDER",
          "id": "folders/FOLDER_ID",
          "displayName": "FOLDER_NAME"
        },
        {
          "nodeType": "GCP_ORGANIZATION",
          "id": "organizations/ORGANIZATION_ID"
        }
      ]
    },
    "resourcePathString": "organizations/ORGANIZATION_ID/folders/FOLDER_ID/projects/PROJECT_NUMBER"
  },
  "sourceProperties": {
    "sourceId": {
      "projectNumber": "PROJECT_NUMBER",
      "customerOrganizationNumber": "ORGANIZATION_ID"
    },
    "detectionCategory": {
      "ruleName": "external_ai_agent_granted_sensitive_role"
    },
    "detectionPriority": "HIGH",
    "affectedResources": [
      {
        "gcpResourceName": "//cloudresourcemanager.googleapis.com/projects/PROJECT_NUMBER"
      }
    ],
    "evidence": [
      {
        "sourceLogId": {
          "projectId": "PROJECT_ID",
          "resourceContainer": "projects/PROJECT_ID",
          "timestamp": {
            "seconds": "TIMESTAMP_SECONDS",
            "nanos": TIMESTAMP_NANOS
          },
          "insertId": "INSERT_ID",
          "logId": "cloudaudit.googleapis.com/activity"
        }
      }
    ],
    "findingId": "FINDING_ID",
    "contextUris": {
      "mitreUri": {
        "displayName": "MITRE Link",
        "url": "https://attack.mitre.org/techniques/T1078/003"
      },
      "cloudLoggingQueryUri": [
        {
          "displayName": "Cloud Logging Query Link",
          "url": "https://console.cloud.google.com/logs/query;query=timestamp%3D%22TIMESTAMP%22%0AinsertId%3D%22INSERT_ID%22?project=PROJECT_ID"
        }
      ]
    },
    "domains": [
      {
        "category": "AI"
      },
      {
        "category": "IDENTITY_AND_ACCESS"
      }
    ]
  }
}

後續步驟