{
  "affected": [
    {
      "database_specific": {
        "cwes": [
          {
            "cweId": "CWE-506",
            "description": "The product contains code that appears to be malicious in nature.",
            "name": "Embedded Malicious Code"
          }
        ],
        "indicators": {
          "evidence_files": [
            {
              "path": "postinstall.js",
              "sha256": "4e1c182ebf45e34a28a3e7b757eb8442d3b307372dbbc0d2b50898c03fb738d6",
              "tlsh": "1871a56619b4063227e52ee169862094972ac767791cbae0721e13485fce1be40f13ff"
            }
          ],
          "package_integrity": [
            {
              "filename": "r2-https-b-1.0.0.tgz",
              "hashes": {
                "sha1": "8a275bc95b24a3acaa524dcad29bc9007355fc19",
                "sha512_sri": "sha512-4awAT4uqWnfreXIQ2dwlO2rNOz66od0hf1qIosFZYyqaM1NoUZXnIhHnKZQedq5+aXdUJCwjiqiTqrnsbSO6qw=="
              }
            }
          ]
        }
      },
      "package": {
        "ecosystem": "npm",
        "name": "@s4yhiitestpoc/r2-https-b"
      },
      "versions": [
        "1.0.0"
      ]
    }
  ],
  "credits": [
    {
      "contact": [
        "inspector-research@amazon.com"
      ],
      "name": "Amazon Inspector",
      "type": "FINDER"
    }
  ],
  "database_specific": {
    "malicious-packages-origins": [
      {
        "id": "IN-MAL-2026-021460",
        "import_time": "2026-10-12T05:29:25.256040939Z",
        "modified_time": "2026-10-12T05:27:26Z",
        "sha256": "e89449bafb4f816bd8605f45cedf0fec8ec0cff9088007a7a38aaea0a9db91ec",
        "source": "amazon-inspector",
        "versions": [
          "1.0.0"
        ]
      }
    ]
  },
  "details": "\n---\n_-= Per source details. Do not edit below this line.=-_\n\n## Source: amazon-inspector (e89449bafb4f816bd8605f45cedf0fec8ec0cff9088007a7a38aaea0a9db91ec)\nOn npm install, postinstall.js automatically collects installer-side identifying data \u2014 hostname, username, home directory, non-internal network interface addresses, DNS servers, current working directory, install directory, and the value of npm_config_registry (which discloses the installer\u0027s internal/private npm registry URL) \u2014 and POSTs it as JSON over HTTPS to the hardcoded author endpoint collector.oob.s4yhii.com at path /_npm-poc/beacon. In parallel, the script performs a DNS lookup against a unique per-run subdomain under oob.s4yhii.com (dns.lookup of \u003clabel\u003e.db03o8lag74hsugsg2j091t8mfcf437h3.oob.s4yhii.com), providing an out-of-band DNS confirmation channel that works even when outbound HTTPS is blocked. The dual-channel beacon, the capture of internal registry configuration, and the fully automated install-time trigger match the fingerprint of a dependency-confusion probe. The package\u0027s self-description as a proof-of-concept does not change the behavior: installer-side host and internal-infrastructure data leaves the host to an attacker-controlled destination without opt-in.\n",
  "id": "MAL-2026-17808",
  "modified": "2026-10-12T05:27:26Z",
  "published": "2026-10-12T05:27:26Z",
  "references": [
    {
      "type": "PACKAGE",
      "url": "https://www.npmjs.com/package/@s4yhiitestpoc/r2-https-b/v/1.0.0"
    }
  ],
  "schema_version": "1.7.4",
  "summary": "Malicious code in @s4yhiitestpoc/r2-https-b (npm)"
}