Malicious code in with-cte (npm)

{
  "id": "2d5e3d831a96f7b93f4de32a659179d118bcd1442e9fcffc4a604d0d2081d0ed",
  "url": "https://osv.dev/vulnerability/MAL-2026-17579",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "Malicious code in with-cte (npm)",
    "summary": "with-cte@1.0.0 contains no functional code: its only behaviour is a preinstall script that runs `node index.js` on npm install. index.js collects the install directory, the user's home directory, hostname, username and DNS servers, and the full contents of /etc/passwd and /etc/hosts, then sends them as JSON in an HTTPS POST to `187d714jo62z5j5c39hc437myd44sxgm.oastify.com`, a Burp Collaborator endpoint. The npm account testneo7755 published it on 2026-10-05 and it was unpublished 56 seconds later; the same account published checkmate-remediation-assistant the same day with the same index.js and a different Collaborator subdomain. --- _-= Per source details. Do not edit below this line.=-_ ## Source: amazon-inspector (8eceeb0a05cd8d1a289f1a1006df8acd825d73f341ec1a50e095dc2850b866c8) The package declares a preinstall lifecycle hook (`preinstall: node index.js`) that runs automatically on `npm install`. index.js collects installer host identifiers (os.hostname, os.userInfo, homedir, DNS servers) and reads the contents of /etc/passwd and /etc/hosts, then POSTs the collected data over HTTPS to the Burp Collaborator subdomain 187d714jo62z5j5c39hc437myd44sxgm.oastify.com. The package otherwise contains no library code, has empty author/description metadata, and provides no functionality — the shipped surface is solely the install-time beacon, consistent with a dependency-confusion or internal-name squat probe.",
    "evidence": "osv:MAL-2026-17579",
    "products": [
      {
        "name": {
          "value": "with-cte",
          "evidence": "/affected/0/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [],
        "affected_versions": [
          {
            "value": "1.0.0",
            "evidence": "/affected/0/versions"
          }
        ]
      }
    ],
    "severity": "unknown",
    "structured": {
      "id": "MAL-2026-17579",
      "aliases": [
        "MAL-2026-17579"
      ],
      "affected": [
        {
          "package": {
            "name": "with-cte",
            "purl": "pkg:npm/with-cte",
            "ecosystem": "npm"
          },
          "versions": [
            "1.0.0"
          ],
          "database_specific": {
            "cwes": [
              {
                "name": "Embedded Malicious Code",
                "cweId": "CWE-506",
                "description": "The product contains code that appears to be malicious in nature."
              },
              {
                "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/with-cte/MAL-2026-17579.json",
            "indicators": {
              "evidence_files": [
                {
                  "path": "index.js",
                  "tlsh": "33411399a2d917330de114c06a0c70852359fa777159a8d076cf4396af869f8b7226f3",
                  "sha256": "9f166ed0f6ddc8c6af3cdecd03dc086fa3921102a3c569d92326718e028f7103"
                },
                {
                  "path": "package.json",
                  "tlsh": "4fd0a7384d21553325c516a20c2b944772618f2f04043c0863cb182c91ce77798ff35c",
                  "sha256": "57f305d98ee36961808b9408ddb98d5d0b15ea1b77e09564860d2b843f8060f9"
                }
              ],
              "package_integrity": [
                {
                  "hashes": {
                    "sha1": "c182f210794123466d1568c3d909160e0f34e52e",
                    "sha512_sri": "sha512-Hbkil57Pefuv1lLN9G2JJyU7M1x65dbCqf/uLxDGND4Y+3Ky4m3nZKq61ZInD7Dd+ZMG8cgI2TsOgbtMhFnDpQ=="
                  },
                  "filename": "with-cte-1.0.0.tgz"
                }
              ]
            }
          }
        }
      ],
      "modified": "2026-10-07T06:30:04.942736078Z",
      "provider": "osv",
      "references": [
        "https://www.npmjs.com/package/with-cte/v/1.0.0",
        "https://www.npmjs.com/package/with-cte"
      ],
      "provider_metadata": {
        "iocs": {
          "urls": [
            "https://187d714jo62z5j5c39hc437myd44sxgm.oastify.com/"
          ],
          "files": [
            {
              "note": "preinstall script runs `node index.js`.",
              "paths": [
                "package.json"
              ],
              "source": "PACKAGE_ARCHIVE",
              "digests": {
                "sha256": "57f305d98ee36961808b9408ddb98d5d0b15ea1b77e09564860d2b843f8060f9"
              }
            },
            {
              "note": "Executed by the preinstall script of with-cte@1.0.0.",
              "paths": [
                "index.js"
              ],
              "source": "PACKAGE_ARCHIVE",
              "digests": {
                "sha256": "9f166ed0f6ddc8c6af3cdecd03dc086fa3921102a3c569d92326718e028f7103"
              }
            }
          ],
          "domains": [
            "187d714jo62z5j5c39hc437myd44sxgm.oastify.com"
          ]
        },
        "malicious-packages-origins": [
          {
            "id": "IN-MAL-2026-021080",
            "sha256": "8eceeb0a05cd8d1a289f1a1006df8acd825d73f341ec1a50e095dc2850b866c8",
            "source": "amazon-inspector",
            "versions": [
              "1.0.0"
            ],
            "import_time": "2026-10-05T16:22:57.062637671Z",
            "modified_time": "2026-10-05T16:14:55Z"
          }
        ]
      }
    },
    "related_cves": [],
    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "core-osv",
  "document_id": 93160,
  "published_at": "2026-10-05T08:04:30+00:00"
}