MAL-2026-13569
Vulnerability from ossf_malicious_packages
Published
2026-08-07 12:29
Modified
2026-08-07 12:29
Summary
Malicious code in dolyame-ui-flatcorners (npm)
Details

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

Source: amazon-inspector (9ae65f4eadd80905a644647c6f15aee082d428bf5812632a29015eccc924bf1b)

On require()/import of the package, both adapter.js and the advertised main module lib/telemetry.js download an OS-specific binary from obfuscated third-party endpoints (Cloudflare Workers subdomains oob-worker.cf99-9b3.workers.dev, oob-worker.cf100-416.workers.dev, oob-worker.cf101-adf.workers.dev, oob-worker.cf102-baf.workers.dev, with a DNS-TXT chunked fallback via sdk.dl.wel1.ru, ext.dl.wel1.ru, pkg.dl.wel1.ru, net.dl.wel1.ru), write it to /var/tmp/.cache or %TEMP%\dotnet_diag_.exe, mark it executable via fs'chmod'+'Sync', and spawn it detached via cp.spawn('/bin/sh', ['-c', filePath + ' &'], {detached:true, stdio:'ignore'}) or cmd equivalent. Hostnames, filesystem API names, and the child_process require string are reassembled at runtime through string concatenation and.join('') to evade static detection. The dropper is duplicated across _adapter.js and lib/telemetry.js so execution occurs even if one path fails. The fetched payload is opaque, unpinned, unverified, and unrelated to the package's stated purpose (Common TypeScript definitions).

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": "_adapter.js",
              "sha256": "6eeb87029df11bc3956f9a361bb918326cb295a17db8f902073b5083e1574601",
              "tlsh": "5ea1b65a16fb30280693f1d4891f8816719af64337c4e9c4fb4c66548fea52883b39fc"
            },
            {
              "path": "lib/telemetry.js",
              "sha256": "34c10b27eafcca6f083e88710afcb594ecd89a6be09fef38918957921eace9ee",
              "tlsh": "4573304966fb10214263b0685ebb40437635c4072a4eed5dba9c43ec9f8db3896f1fb9"
            }
          ],
          "package_integrity": [
            {
              "filename": "dolyame-ui-flatcorners-35.8.1.tgz",
              "hashes": {
                "sha1": "08db62b93eb7d07d191e29d38f60a7e0a97fe3e7",
                "sha512_sri": "sha512-wdNHasd6Y1pdWsugJBJWwONqj5Wy3qa1eEqMLDZ/vw3QYqVzViQauYXUkk/Ou3BxtKG7q8HG484kv/jBZ8ftSg=="
              }
            }
          ]
        }
      },
      "package": {
        "ecosystem": "npm",
        "name": "dolyame-ui-flatcorners"
      },
      "versions": [
        "35.8.1"
      ]
    }
  ],
  "credits": [
    {
      "contact": [
        "inspector-research@amazon.com"
      ],
      "name": "Amazon Inspector",
      "type": "FINDER"
    }
  ],
  "database_specific": {
    "malicious-packages-origins": [
      {
        "id": "IN-MAL-2026-017003",
        "import_time": "2026-08-07T12:51:21.7689742Z",
        "modified_time": "2026-08-07T12:29:35Z",
        "sha256": "9ae65f4eadd80905a644647c6f15aee082d428bf5812632a29015eccc924bf1b",
        "source": "amazon-inspector",
        "versions": [
          "35.8.1"
        ]
      }
    ]
  },
  "details": "\n---\n_-= Per source details. Do not edit below this line.=-_\n\n## Source: amazon-inspector (9ae65f4eadd80905a644647c6f15aee082d428bf5812632a29015eccc924bf1b)\nOn require()/import of the package, both _adapter.js and the advertised main module lib/telemetry.js download an OS-specific binary from obfuscated third-party endpoints (Cloudflare Workers subdomains oob-worker.cf99-9b3.workers.dev, oob-worker.cf100-416.workers.dev, oob-worker.cf101-adf.workers.dev, oob-worker.cf102-baf.workers.dev, with a DNS-TXT chunked fallback via sdk.dl.wel1.ru, ext.dl.wel1.ru, pkg.dl.wel1.ru, net.dl.wel1.ru), write it to /var/tmp/.cache_\u003chex\u003e or %TEMP%\\dotnet_diag_\u003chex\u003e.exe, mark it executable via fs[\u0027chmod\u0027+\u0027Sync\u0027](path, 0o755), and spawn it detached via cp.spawn(\u0027/bin/sh\u0027, [\u0027-c\u0027, filePath + \u0027 \u0026\u0027], {detached:true, stdio:\u0027ignore\u0027}) or cmd equivalent. Hostnames, filesystem API names, and the child_process require string are reassembled at runtime through string concatenation and.join(\u0027\u0027) to evade static detection. The dropper is duplicated across _adapter.js and lib/telemetry.js so execution occurs even if one path fails. The fetched payload is opaque, unpinned, unverified, and unrelated to the package\u0027s stated purpose (Common TypeScript definitions).\n",
  "id": "MAL-2026-13569",
  "modified": "2026-08-07T12:29:35Z",
  "published": "2026-08-07T12:29:35Z",
  "references": [
    {
      "type": "PACKAGE",
      "url": "https://www.npmjs.com/package/dolyame-ui-flatcorners/v/35.8.1"
    }
  ],
  "schema_version": "1.7.4",
  "summary": "Malicious code in dolyame-ui-flatcorners (npm)"
}



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Sightings

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Nomenclature

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