MAL-2026-13599
Vulnerability from ossf_malicious_packages
Published
2026-08-07 12:30
Modified
2026-08-07 12:30
Summary
Malicious code in dolyame-ui-sortablelist (npm)
Details

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

Source: amazon-inspector (5c6a49e10172c9781161b964655fc6720e845ddf2049f0cfdbb39464946dbcd7)

On require() the package fetches a platform-specific executable from obfuscated Cloudflare Workers hosts (oob-worker.cf10{0..3}-*.workers.dev, host strings assembled by joining split literals to evade static analysis), with a fallback that reassembles a base64 payload from DNS TXT records under sdk.dl.wel1.ru, ext.dl.wel1.ru, pkg.dl.wel1.ru, and net.dl.wel1.ru. The binary is written to a temp file disguised as OS diagnostics output ('dotnet_diag_.exe' on Windows, '.cache_' elsewhere), chmod'd 0755, and spawned detached and unref'd via cp.spawn('/bin/sh', ['-c', filePath+' &']). The same drop-and-exec logic is duplicated in lib/telemetry.js (the package's declared main), ensuring execution even if bridge.js is bypassed. child_process is imported via string concatenation (require('child'+'process')) and fs.chmodSync via bracket-access to further evade pattern scanning. The module self-labels as 'telemetry/analytics' and gates the drop on DISABLE_TELEMETRY / ANALYTICS_OPT_OUT / DO_NOT_TRACK environment variables as a plausible-deniability cover; the actual behavior is fetch-and-execute of an attacker-controlled binary on the installer's host at import time.

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": "_bridge.js",
              "sha256": "0d29d200ee9aebbe664ddb40d1d22a5be8e8180b8ea6e2abf0b1aa128c9c5ca4",
              "tlsh": "dfa1855a1afe70180792e1d8452b5816719ee95333c4d8d4fb4ca6948f9a239c3b39fc"
            },
            {
              "path": "lib/telemetry.js",
              "sha256": "63c17973060ce316cbf3c7309bfe94d30671fe68d2e253a76673a8671d1b0240",
              "tlsh": "5073304966fb10214263b0685fab40437635c4072a4eed5dba9c43ec9f8db3896f1fb9"
            }
          ],
          "package_integrity": [
            {
              "filename": "dolyame-ui-sortablelist-35.8.1.tgz",
              "hashes": {
                "sha1": "b72c0d66b8dac3dc3838cb0a35de688933717baf",
                "sha512_sri": "sha512-uVG4ThZVciIgrsa0RJCF4kvOQLnrDW5O7YBD6U2LVoQVOEjz40ObpUG0k+SeZ6cPEUC3FW7/nrcYGDXEbwIRcA=="
              }
            }
          ]
        }
      },
      "package": {
        "ecosystem": "npm",
        "name": "dolyame-ui-sortablelist"
      },
      "versions": [
        "35.8.1"
      ]
    }
  ],
  "credits": [
    {
      "contact": [
        "inspector-research@amazon.com"
      ],
      "name": "Amazon Inspector",
      "type": "FINDER"
    }
  ],
  "database_specific": {
    "malicious-packages-origins": [
      {
        "id": "IN-MAL-2026-017011",
        "import_time": "2026-08-07T12:51:22.096019516Z",
        "modified_time": "2026-08-07T12:30:51Z",
        "sha256": "5c6a49e10172c9781161b964655fc6720e845ddf2049f0cfdbb39464946dbcd7",
        "source": "amazon-inspector",
        "versions": [
          "35.8.1"
        ]
      }
    ]
  },
  "details": "\n---\n_-= Per source details. Do not edit below this line.=-_\n\n## Source: amazon-inspector (5c6a49e10172c9781161b964655fc6720e845ddf2049f0cfdbb39464946dbcd7)\nOn require() the package fetches a platform-specific executable from obfuscated Cloudflare Workers hosts (oob-worker.cf10{0..3}-*.workers.dev, host strings assembled by joining split literals to evade static analysis), with a fallback that reassembles a base64 payload from DNS TXT records under sdk.dl.wel1.ru, ext.dl.wel1.ru, pkg.dl.wel1.ru, and net.dl.wel1.ru. The binary is written to a temp file disguised as OS diagnostics output (\u0027dotnet_diag_\u003chex\u003e.exe\u0027 on Windows, \u0027.cache_\u003chex\u003e\u0027 elsewhere), chmod\u0027d 0755, and spawned detached and unref\u0027d via cp.spawn(\u0027/bin/sh\u0027, [\u0027-c\u0027, filePath+\u0027 \u0026\u0027]). The same drop-and-exec logic is duplicated in lib/telemetry.js (the package\u0027s declared main), ensuring execution even if _bridge.js is bypassed. child_process is imported via string concatenation (require(\u0027child_\u0027+\u0027process\u0027)) and fs.chmodSync via bracket-access to further evade pattern scanning. The module self-labels as \u0027telemetry/analytics\u0027 and gates the drop on DISABLE_TELEMETRY / ANALYTICS_OPT_OUT / DO_NOT_TRACK environment variables as a plausible-deniability cover; the actual behavior is fetch-and-execute of an attacker-controlled binary on the installer\u0027s host at import time.\n",
  "id": "MAL-2026-13599",
  "modified": "2026-08-07T12:30:51Z",
  "published": "2026-08-07T12:30:51Z",
  "references": [
    {
      "type": "PACKAGE",
      "url": "https://www.npmjs.com/package/dolyame-ui-sortablelist/v/35.8.1"
    }
  ],
  "schema_version": "1.7.4",
  "summary": "Malicious code in dolyame-ui-sortablelist (npm)"
}



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Nomenclature

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