權限提升：AI 代理透過默示委派機制產生權杖

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

AI 代理程式濫用 iam.serviceAccounts.implicitDelegation 權限，從權限較高的服務帳戶產生存取權杖。發現項目預設為低嚴重程度。

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：

查看發現項目詳細資料

  1. 按照「查看結果」一文的指示，開啟 Privilege Escalation: AI Agent Token Generation Using Implicit Delegation 發現項目。查看「摘要」和「JSON」分頁中的詳細資料。

  2. 找出這個資源在類似時間發生的其他發現事項。 相關發現可能指出這項活動是惡意活動，而非未遵循最佳做法。

  3. 查看受影響資源的設定。

  4. 查看受影響資源的記錄。

研究攻擊和回應方法

查看這類發現項目的 MITRE ATT&CK 框架項目：竊取應用程式存取權杖。

實作回覆內容

如需回應建議，請參閱「回應 AI 威脅發現結果」。

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": "Privilege Escalation: AI Agent Suspicious Token Generation Using Implicit Delegation",
    "securityMarks": {
      "name": "organizations/ORGANIZATION_ID/sources/SOURCE_ID/locations/global/findings/FINDING_ID/securityMarks"
    },
    "eventTime": "TIMESTAMP",
    "createTime": "TIMESTAMP",
    "severity": "LOW",
    "canonicalName": "projects/PROJECT_NUMBER/sources/SOURCE_ID/locations/global/findings/FINDING_ID",
    "findingClass": "THREAT",
    "access": {
      "callerIp": "IP_ADDRESS",
      "callerIpGeo": {
        "regionCode": "COUNTRY_CODE"
      },
      "userAgent": "USER_AGENT",
      "serviceName": "iamcredentials.googleapis.com",
      "methodName": "GenerateAccessToken",
      "principalSubject": "principal://agents.global.org-ORGANIZATION_ID.system.id.goog/resources/aiplatform/projects/PROJECT_NUMBER/locations/LOCATION/reasoningEngines/REASONING_ENGINE_ID"
    },
    "mitreAttack": {
      "primaryTactic": "PRIVILEGE_ESCALATION",
      "primaryTechniques": [
        "ACCESS_TOKEN_MANIPULATION",
        "TOKEN_IMPERSONATION_OR_THEFT"
      ]
    },
    "parentDisplayName": "Event Threat Detection",
    "domains": [
      {
        "category": "AI"
      },
      {
        "category": "IDENTITY_AND_ACCESS"
      }
    ],
    "logEntries": [
      {
        "cloudLoggingEntry": {
          "insertId": "INSERT_ID",
          "logId": "cloudaudit.googleapis.com/data_access",
          "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/organizations/ORGANIZATION_ID",
      "parentDisplayName": "ORGANIZATION_DISPLAY_NAME",
      "organization": "organizations/ORGANIZATION_ID"
    },
    "resourcePath": {
      "nodes": [
        {
          "nodeType": "GCP_PROJECT",
          "id": "projects/PROJECT_NUMBER",
          "displayName": "PROJECT_ID"
        },
        {
          "nodeType": "GCP_ORGANIZATION",
          "id": "organizations/ORGANIZATION_ID"
        }
      ]
    },
    "resourcePathString": "organizations/ORGANIZATION_ID/projects/PROJECT_NUMBER"
  },
  "sourceProperties": {
    "sourceId": {
      "projectNumber": "PROJECT_NUMBER",
      "customerOrganizationNumber": "ORGANIZATION_ID"
    },
    "detectionCategory": {
      "ruleName": "agent_engine_suspicious_token_generation",
      "subRuleName": "agent_engine_suspicious_token_generation_implicit_delegation"
    },
    "detectionPriority": "LOW",
    "affectedResources": [
      {
        "gcpResourceName": "//iamcredentials.googleapis.com/projects/-/serviceAccounts/SERVICE_ACCOUNT_UNIQUE_ID"
      },
      {
        "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/data_access"
        }
      }
    ],
    "findingId": "FINDING_ID",
    "contextUris": {
      "mitreUri": {
        "displayName": "MITRE Link",
        "url": "https://attack.mitre.org/techniques/T1134/001"
      },
      "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