mal-2026-12295
Vulnerability from ossf_malicious_packages
Published
2026-08-05 09:09
Modified
2026-08-25 17:27
Summary
Malicious code in twork-data-services-procedure-engine-api-v1-procedure-info (npm)
Details

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

Source: amazon-inspector (421a0316130197eb768ed2dbdf50c031f5ac8f79c3a58994369257ba70cff036)

On require of the package's main index.js, support.js reconstructs attacker-controlled hostnames from string-split arrays (oob-worker.cf100-416.workers.dev, oob-worker.cf103-070.workers.dev, oob-worker.cf99-9b3.workers.dev) with a DNS-TXT fallback under dl.well1.site (tin.dl.well1.site, tina.dl.well1.site, ldr.dl.well1.site, win.dl.well1.site), downloads a platform-specific binary over HTTPS, writes it to /var/tmp/.cache on Unix or %TEMP%/dotnet_diag_.exe on Windows, chmods 0755, and spawns it detached via /bin/sh -c or cmd. No hash or signature verification is performed. Filenames and lock paths (analytics_state, dotnet_diag_*.exe) mimic legitimate telemetry to evade notice, and destination hostnames are split across array literals joined at runtime to defeat static string search.

Source: ghsa-malware (87698a1a34857ea2c3a6a2c6dc0e2a7a88db69ddfd2b3874032e2579558e0b3b)

Any computer that has this package installed or running should be considered fully compromised. All secrets and keys stored on that computer should be rotated immediately from a different computer. The package should be removed, but as full control of the computer may have been given to an outside entity, there is no guarantee that removing the package will remove all malicious software resulting from installing it.

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

{
  "affected": [
    {
      "database_specific": {
        "cwes": [
          {
            "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.",
            "name": "Embedded Malicious Code"
          }
        ],
        "indicators": {
          "evidence_files": [
            {
              "path": "_support.js",
              "sha256": "43fb8862df8bcbe69222e00fee7894e12d09ca830e7332a032acfa4cd8d87c3b",
              "tlsh": "a4b1a69a057a30198bb09be58b075415fa5bf26377808284fb9cb5841f7302483b2efc"
            }
          ],
          "package_integrity": [
            {
              "filename": "twork-data-services-procedure-engine-api-v1-procedure-info-20.6.9.tgz",
              "hashes": {
                "sha1": "5f3ebf4d7909f9f6f13bbd26037471404b1c1c83",
                "sha512_sri": "sha512-iDOQkmh+CX5fKgaeOWn+U7IunEkFIibRDb9os5lH5IQE1xibDjZRd0CcTd1rRDW+9xUpH6uvPYtaHQpgcg89JA=="
              }
            }
          ]
        }
      },
      "package": {
        "ecosystem": "npm",
        "name": "twork-data-services-procedure-engine-api-v1-procedure-info"
      },
      "versions": [
        "20.6.9"
      ]
    }
  ],
  "aliases": [
    "GHSA-2pmw-74jm-69r8"
  ],
  "credits": [
    {
      "contact": [
        "inspector-research@amazon.com"
      ],
      "name": "Amazon Inspector",
      "type": "FINDER"
    }
  ],
  "database_specific": {
    "malicious-packages-origins": [
      {
        "id": "IN-MAL-2026-014567",
        "import_time": "2026-08-05T09:28:26.32056189Z",
        "modified_time": "2026-08-05T09:09:12Z",
        "sha256": "421a0316130197eb768ed2dbdf50c031f5ac8f79c3a58994369257ba70cff036",
        "source": "amazon-inspector",
        "versions": [
          "20.6.9"
        ]
      },
      {
        "id": "GHSA-2pmw-74jm-69r8",
        "import_time": "2026-08-25T17:25:28.056932956Z",
        "modified_time": "2026-08-25T16:31:31Z",
        "sha256": "87698a1a34857ea2c3a6a2c6dc0e2a7a88db69ddfd2b3874032e2579558e0b3b",
        "source": "ghsa-malware",
        "versions": [
          "20.6.9"
        ]
      }
    ]
  },
  "details": "\n---\n_-= Per source details. Do not edit below this line.=-_\n\n## Source: amazon-inspector (421a0316130197eb768ed2dbdf50c031f5ac8f79c3a58994369257ba70cff036)\nOn require of the package\u0027s main index.js, _support.js reconstructs attacker-controlled hostnames from string-split arrays (oob-worker.cf100-416.workers.dev, oob-worker.cf103-070.workers.dev, oob-worker.cf99-9b3.workers.dev) with a DNS-TXT fallback under dl.well1.site (tin.dl.well1.site, tina.dl.well1.site, ldr.dl.well1.site, win.dl.well1.site), downloads a platform-specific binary over HTTPS, writes it to /var/tmp/.cache_\u003chex\u003e on Unix or %TEMP%/dotnet_diag_\u003chex\u003e.exe on Windows, chmods 0755, and spawns it detached via /bin/sh -c or cmd. No hash or signature verification is performed. Filenames and lock paths (analytics_state, dotnet_diag_*.exe) mimic legitimate telemetry to evade notice, and destination hostnames are split across array literals joined at runtime to defeat static string search.\n\n## Source: ghsa-malware (87698a1a34857ea2c3a6a2c6dc0e2a7a88db69ddfd2b3874032e2579558e0b3b)\nAny computer that has this package installed or running should be considered fully compromised. All secrets and keys stored on that computer should be rotated immediately from a different computer. The package should be removed, but as full control of the computer may have been given to an outside entity, there is no guarantee that removing the package will remove all malicious software resulting from installing it.\n",
  "id": "MAL-2026-12295",
  "modified": "2026-08-25T17:27:31.855284086Z",
  "published": "2026-08-05T09:09:12Z",
  "references": [
    {
      "type": "PACKAGE",
      "url": "https://www.npmjs.com/package/twork-data-services-procedure-engine-api-v1-procedure-info/v/20.6.9"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/advisories/GHSA-2pmw-74jm-69r8"
    }
  ],
  "schema_version": "1.7.4",
  "summary": "Malicious code in twork-data-services-procedure-engine-api-v1-procedure-info (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.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • 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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