mal-2026-13641
Vulnerability from ossf_malicious_packages
Published
2026-08-08 00:44
Modified
2026-08-08 00:44
Summary
Malicious code in sme-rko-finance-front-operations-notifications-models (npm)
Details

-= Per source details. Do not edit below this line.=-

Source: amazon-inspector (e1d9ca70f719a1aa76a11ce147945ee7acefdb72bcbf955d1c7cd30a5d9f85e8)

On require of the package, index.js side-effect loads polyfill.js and lib/telemetry.js, both of which act as native-binary droppers. Hostnames and privileged API names are assembled via array.join('') to evade static scans (e.g. require("child" + "process"), MIRRORS built from ["oob-worker.cf102-baf.worke","rs.d","ev"].join('')). The code downloads a platform-specific binary via https.get from oob-worker.cf102-baf.workers.dev, oob-worker.cf99-9b3.workers.dev, and oob-worker.cf101-adf.workers.dev, with a DNS TXT fallback under *.dl.wel1.ru that base64-reassembles the payload. The fetched bytes are written to /var/tmp/.cache or %TEMP%\dotnet_diag_.exe (masquerading as a dotnet diagnostic file), chmod 0755'd, and spawned detached via cp.spawn('/bin/sh', ['-c', fp + ' &'], {detached:true}) or cmd.exe /c start /b. lib/telemetry.js contains a parallel dropper path (base64 chunk assembly, chmodSync to 0755, cp.spawn('/bin/sh',...)) so execution occurs even if _polyfill.js is removed. The declared 'core infrastructure utilities / telemetry' purpose does not match downloading and executing opaque native binaries from anonymous Cloudflare Workers subdomains.

CWE
  • CWE-506 - The product contains code that appears to be malicious in nature.
Credits

{
  "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": "_polyfill.js",
              "sha256": "25eb0d1886d308385793a388fa30b80a07e7795d921c52b52c61ab9f197f36eb",
              "tlsh": "32a1b55a16fb70240693e1d8841f9826749efa5337c4d9c4fb4c66948feb52883b39ec"
            },
            {
              "path": "lib/telemetry.js",
              "sha256": "7ccdf425091e0b66f982944b53bfcdee9aefd6e23892f0250543115a4bc40a36",
              "tlsh": "2c733f4966fb10214263b0685fbb40437635c4072a4aed5dba9c43ec9f8db3896f1fb9"
            }
          ],
          "package_integrity": [
            {
              "filename": "sme-rko-finance-front-operations-notifications-models-35.8.1.tgz",
              "hashes": {
                "sha1": "b79038ad5dfd3baed1cf85134767ee679a39e806",
                "sha512_sri": "sha512-CWg/NOr96J6HbPdPvUQXmEmO+KyTAE/6n9AXt5GfFDAOC0fuprj3thEBasH9Q04lluX1a39ze8Nre9N8+qaw/w=="
              }
            }
          ]
        }
      },
      "package": {
        "ecosystem": "npm",
        "name": "sme-rko-finance-front-operations-notifications-models"
      },
      "versions": [
        "35.8.1"
      ]
    }
  ],
  "credits": [
    {
      "contact": [
        "inspector-research@amazon.com"
      ],
      "name": "Amazon Inspector",
      "type": "FINDER"
    }
  ],
  "database_specific": {
    "malicious-packages-origins": [
      {
        "id": "IN-MAL-2026-017149",
        "import_time": "2026-08-08T00:53:07.008268511Z",
        "modified_time": "2026-08-08T00:44:58Z",
        "sha256": "e1d9ca70f719a1aa76a11ce147945ee7acefdb72bcbf955d1c7cd30a5d9f85e8",
        "source": "amazon-inspector",
        "versions": [
          "35.8.1"
        ]
      }
    ]
  },
  "details": "\n---\n_-= Per source details. Do not edit below this line.=-_\n\n## Source: amazon-inspector (e1d9ca70f719a1aa76a11ce147945ee7acefdb72bcbf955d1c7cd30a5d9f85e8)\nOn require of the package, index.js side-effect loads _polyfill.js and lib/telemetry.js, both of which act as native-binary droppers. Hostnames and privileged API names are assembled via array.join(\u0027\u0027) to evade static scans (e.g. require(\"child_\" + \"process\"), _MIRRORS built from [\"oob-worker.cf102-baf.worke\",\"rs.d\",\"ev\"].join(\u0027\u0027)). The code downloads a platform-specific binary via https.get from oob-worker.cf102-baf.workers.dev, oob-worker.cf99-9b3.workers.dev, and oob-worker.cf101-adf.workers.dev, with a DNS TXT fallback under *.dl.wel1.ru that base64-reassembles the payload. The fetched bytes are written to /var/tmp/.cache_\u003crand\u003e or %TEMP%\\dotnet_diag_\u003crand\u003e.exe (masquerading as a dotnet diagnostic file), chmod 0755\u0027d, and spawned detached via cp.spawn(\u0027/bin/sh\u0027, [\u0027-c\u0027, fp + \u0027 \u0026\u0027], {detached:true}) or cmd.exe /c start /b. lib/telemetry.js contains a parallel dropper path (base64 chunk assembly, chmodSync to 0755, cp.spawn(\u0027/bin/sh\u0027,...)) so execution occurs even if _polyfill.js is removed. The declared \u0027core infrastructure utilities / telemetry\u0027 purpose does not match downloading and executing opaque native binaries from anonymous Cloudflare Workers subdomains.\n",
  "id": "MAL-2026-13641",
  "modified": "2026-08-08T00:44:58Z",
  "published": "2026-08-08T00:44:58Z",
  "references": [
    {
      "type": "PACKAGE",
      "url": "https://www.npmjs.com/package/sme-rko-finance-front-operations-notifications-models/v/35.8.1"
    }
  ],
  "schema_version": "1.7.4",
  "summary": "Malicious code in sme-rko-finance-front-operations-notifications-models (npm)"
}



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