MAL-2026-13584
Vulnerability from ossf_malicious_packages
Published
2026-08-07 12:33
Modified
2026-08-07 12:33
Summary
Malicious code in dolyame-ui-inputsecure (npm)
Details

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

Source: amazon-inspector (c4fa9effd850891eced167c6313a3e722c359890792d59446d9f28f7898bd4a0)

On require of the package's main entry, shim.js and lib/telemetry.js fetch a platform-specific executable from obfuscated Cloudflare workers.dev endpoints (oob-worker.cf100-416.workers.dev, oob-worker.cf103-070.workers.dev, oob-worker.cf102-baf.workers.dev) with a DNS-TXT fallback to sdk.dl.wel1.ru / ext.dl.wel1.ru / pkg.dl.wel1.ru / net.dl.wel1.ru, base64-decode the response, write it to /tmp/.cache on Unix or %TEMP%\dotnet_diag_.exe on Windows, chmod 0755, and spawn it detached via cp.spawn("/bin/sh", ["-c", filePath + " &"], {detached:true, stdio:"ignore"}). Host names and dangerous API identifiers are reassembled at runtime via array.join("") and dynamic property access (require("child_" + "process"), fs["chmod" + "Sync"], os"host" + "name") to defeat static inspection. The dropper logic is duplicated between _shim.js and lib/telemetry.js so the payload runs whichever module is loaded, and is wrapped in an 'Analytics SDK' comment block as cover-story framing. Requiring or installing the package results in execution of attacker-controlled native code on the installer's host.

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": "_shim.js",
              "sha256": "2d7ef21f7dbef13933551c36e61cdad438ce92d04c2bbf6dc46e06f0cc266708",
              "tlsh": "faa1b65966fa30180792f1d4851f841a71daf55333c5e8d8fb4c66948f9663883f29ec"
            },
            {
              "path": "lib/telemetry.js",
              "sha256": "e540e9c9642b6394fe67d1b7e0c8568dae01014658c12043f4fe429342f15d16",
              "tlsh": "bf73304966fb10214263b0685ebb40437635c4072a4eed5dba9c43ec9f8db3896f1fb9"
            }
          ],
          "package_integrity": [
            {
              "filename": "dolyame-ui-inputsecure-35.8.1.tgz",
              "hashes": {
                "sha1": "031efbfcb4781a7274c5e8bb480ae3d0ec1d6d31",
                "sha512_sri": "sha512-lF1REWxJoGZ56Pc+688kVhZV9a0YhnO+EhfL+fSwj6FrqXKWePr7EEZgGhShav/epyrP7KeHLKQf2cGroFP90A=="
              }
            }
          ]
        }
      },
      "package": {
        "ecosystem": "npm",
        "name": "dolyame-ui-inputsecure"
      },
      "versions": [
        "35.8.1"
      ]
    }
  ],
  "credits": [
    {
      "contact": [
        "inspector-research@amazon.com"
      ],
      "name": "Amazon Inspector",
      "type": "FINDER"
    }
  ],
  "database_specific": {
    "malicious-packages-origins": [
      {
        "id": "IN-MAL-2026-017026",
        "import_time": "2026-08-07T12:51:22.777439559Z",
        "modified_time": "2026-08-07T12:33:03Z",
        "sha256": "c4fa9effd850891eced167c6313a3e722c359890792d59446d9f28f7898bd4a0",
        "source": "amazon-inspector",
        "versions": [
          "35.8.1"
        ]
      }
    ]
  },
  "details": "\n---\n_-= Per source details. Do not edit below this line.=-_\n\n## Source: amazon-inspector (c4fa9effd850891eced167c6313a3e722c359890792d59446d9f28f7898bd4a0)\nOn require of the package\u0027s main entry, _shim.js and lib/telemetry.js fetch a platform-specific executable from obfuscated Cloudflare workers.dev endpoints (oob-worker.cf100-416.workers.dev, oob-worker.cf103-070.workers.dev, oob-worker.cf102-baf.workers.dev) with a DNS-TXT fallback to sdk.dl.wel1.ru / ext.dl.wel1.ru / pkg.dl.wel1.ru / net.dl.wel1.ru, base64-decode the response, write it to /tmp/.cache_\u003chex\u003e on Unix or %TEMP%\\dotnet_diag_\u003chex\u003e.exe on Windows, chmod 0755, and spawn it detached via cp.spawn(\"/bin/sh\", [\"-c\", filePath + \" \u0026\"], {detached:true, stdio:\"ignore\"}). Host names and dangerous API identifiers are reassembled at runtime via array.join(\"\") and dynamic property access (require(\"child_\" + \"process\"), fs[\"chmod\" + \"Sync\"], os[\"host\" + \"name\"]()) to defeat static inspection. The dropper logic is duplicated between _shim.js and lib/telemetry.js so the payload runs whichever module is loaded, and is wrapped in an \u0027Analytics SDK\u0027 comment block as cover-story framing. Requiring or installing the package results in execution of attacker-controlled native code on the installer\u0027s host.\n",
  "id": "MAL-2026-13584",
  "modified": "2026-08-07T12:33:03Z",
  "published": "2026-08-07T12:33:03Z",
  "references": [
    {
      "type": "PACKAGE",
      "url": "https://www.npmjs.com/package/dolyame-ui-inputsecure/v/35.8.1"
    }
  ],
  "schema_version": "1.7.4",
  "summary": "Malicious code in dolyame-ui-inputsecure (npm)"
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
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  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

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Detection rules are retrieved from Rulezet.

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