Malicious code in rs-lookout-sandbox-poc (npm)

{
  "id": "f69706dd055df9eed4f828787052841483b7b47b33ea04f9de5c50d82946dd04",
  "url": "https://osv.dev/vulnerability/MAL-2026-18109",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "Malicious code in rs-lookout-sandbox-poc (npm)",
    "summary": "--- _-= Per source details. Do not edit below this line.=-_ ## Source: amazon-inspector (4f28ed1c404dad5afc7b70b345eeef6f81e04dcee77be3a7553956c7a43f8e7c) On module load, index.js reads os.userInfo().username and issues an HTTPS GET to a hardcoded third-party collector at https://webhook.site/553dad0e-c841-46a8-b07d-213b52a24686/, transmitting the installer's local username to an anonymous external endpoint. The same top-level code performs AWS Instance Metadata Service reconnaissance against 169.254.169.254: it PUTs /latest/api/token to obtain an IMDSv2 session token and then GETs /latest/meta-data/iam/security-credentials/ to enumerate the IAM role attached to the host. Both behaviors fire automatically when the package is required, with no caller action.",
    "evidence": "osv:MAL-2026-18109",
    "products": [
      {
        "name": {
          "value": "rs-lookout-sandbox-poc",
          "evidence": "/affected/0/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [],
        "affected_versions": [
          {
            "value": "1.0.1",
            "evidence": "/affected/0/versions"
          }
        ]
      }
    ],
    "severity": "unknown",
    "structured": {
      "id": "MAL-2026-18109",
      "aliases": [
        "MAL-2026-18109"
      ],
      "affected": [
        {
          "package": {
            "name": "rs-lookout-sandbox-poc",
            "purl": "pkg:npm/rs-lookout-sandbox-poc",
            "ecosystem": "npm"
          },
          "versions": [
            "1.0.1"
          ],
          "database_specific": {
            "cwes": [
              {
                "name": "Embedded Malicious Code",
                "cweId": "CWE-506",
                "description": "The product contains code that appears to be malicious in nature."
              }
            ],
            "source": "https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/rs-lookout-sandbox-poc/MAL-2026-18109.json",
            "indicators": {
              "evidence_files": [
                {
                  "path": "index.js",
                  "tlsh": "8b2163d491e4703377b168acf4269b43e913ea442883c5c4f67447d7fd88490bc227b8",
                  "sha256": "7bdac5b84fece5c9d8101fe1317ec7e5838062bd7777ec25a558e25fa33c8b14"
                }
              ],
              "package_integrity": [
                {
                  "hashes": {
                    "sha1": "f08e0c6a06b3086fed2ccd73000a9ec546d7733e",
                    "sha512_sri": "sha512-SFlisk2msScb8QsQ5Tj1Vok19Q5UGmCkCvFAKv5XzASXlba6H+6WoODyLLb6QqfUSkSg1p4YflnAqsKw1tvI3Q=="
                  },
                  "filename": "rs-lookout-sandbox-poc-1.0.1.tgz"
                }
              ]
            }
          }
        }
      ],
      "modified": "2026-10-20T19:00:04.366436158Z",
      "provider": "osv",
      "references": [
        "https://www.npmjs.com/package/rs-lookout-sandbox-poc/v/1.0.1"
      ],
      "provider_metadata": {
        "malicious-packages-origins": [
          {
            "id": "IN-MAL-2026-021548",
            "sha256": "4f28ed1c404dad5afc7b70b345eeef6f81e04dcee77be3a7553956c7a43f8e7c",
            "source": "amazon-inspector",
            "versions": [
              "1.0.1"
            ],
            "import_time": "2026-10-20T18:46:13.674706765Z",
            "modified_time": "2026-10-20T18:45:31Z"
          }
        ]
      }
    },
    "related_cves": [],
    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "core-osv",
  "document_id": 390164,
  "published_at": "2026-10-20T18:45:31+00:00"
}