mal-2026-13638
Vulnerability from ossf_malicious_packages
Published
2026-08-08 00:45
Modified
2026-08-08 00:45
Summary
Malicious code in sme-rko-finance-front-operations-holding-domain (npm)
Details

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

Source: amazon-inspector (f6838cce82eaa89f91af46e82f5153f7318dafd0ebccb4bdbb6251114d95ff51)

On require() of the package, shim.js executes a bootstrap() at module top level that fetches a platform-specific native binary from string-concatenation-obfuscated hosts under oob-worker.cf10{0,1,2}-.workers.dev, with a base64 DNS-TXT fallback under .dl.wel1.ru. The fetched bytes are written to /var/tmp/.cache (POSIX) or %TEMP%\dotnet_diag_.exe (Windows), chmod'd 0755, and detached-spawned via /bin/sh -c or cmd /c start /b. The exported main lib/telemetry.js contains a duplicate download-decode-chmod-exec chain (Buffer.from(chunks,'base64'), fs'chmod'+'Sync', cp.spawn('/bin/sh',['-c', filePath + ' &'],{detached:true})) presented under an SDK/telemetry cover story. Destination hostnames and dangerous identifiers (require('child_'+'process'), fs['chmod'+'Sync']) are constructed via array-join and string concatenation to defeat static analysis. Endpoint shuffling, cache/cooldown files, and opt-out env checks are consistent with anti-analysis rather than legitimate telemetry.

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": "12b446d122da53533f67de0b0cb18dc7e3e778fa74b1328e7c9b7b31886d6e42",
              "tlsh": "82a1a62a16fa30180792e5d5891f6416719af58333c4e5c4fb4c76985fe622883f39ec"
            },
            {
              "path": "lib/telemetry.js",
              "sha256": "150c75790bf0b1febfd45a8ed06d177a5d8ebc8451a161294b9534d1fe4d079e",
              "tlsh": "0f733f4966fb10214263b0685ebb40437635c4072a4eed5dba9c43ec9f8db3896f1fb9"
            }
          ],
          "package_integrity": [
            {
              "filename": "sme-rko-finance-front-operations-holding-domain-35.8.1.tgz",
              "hashes": {
                "sha1": "eb6e21debbd8a47768ba7c1819547c6cf7aa1c36",
                "sha512_sri": "sha512-mUiuGfLu0jvyimwY1dQgsaj25BVy0uK6/iOJHAUpSmbVJAwm8Dknbuuc0Ekqp4l2JM+SiARwgmNCkder89aLGg=="
              }
            }
          ]
        }
      },
      "package": {
        "ecosystem": "npm",
        "name": "sme-rko-finance-front-operations-holding-domain"
      },
      "versions": [
        "35.8.1"
      ]
    }
  ],
  "credits": [
    {
      "contact": [
        "inspector-research@amazon.com"
      ],
      "name": "Amazon Inspector",
      "type": "FINDER"
    }
  ],
  "database_specific": {
    "malicious-packages-origins": [
      {
        "id": "IN-MAL-2026-017154",
        "import_time": "2026-08-08T00:53:07.355884346Z",
        "modified_time": "2026-08-08T00:45:40Z",
        "sha256": "f6838cce82eaa89f91af46e82f5153f7318dafd0ebccb4bdbb6251114d95ff51",
        "source": "amazon-inspector",
        "versions": [
          "35.8.1"
        ]
      }
    ]
  },
  "details": "\n---\n_-= Per source details. Do not edit below this line.=-_\n\n## Source: amazon-inspector (f6838cce82eaa89f91af46e82f5153f7318dafd0ebccb4bdbb6251114d95ff51)\nOn require() of the package, _shim.js executes a bootstrap() at module top level that fetches a platform-specific native binary from string-concatenation-obfuscated hosts under oob-worker.cf10{0,1,2}-*.workers.dev, with a base64 DNS-TXT fallback under *.dl.wel1.ru. The fetched bytes are written to /var/tmp/.cache_\u003crand\u003e (POSIX) or %TEMP%\\dotnet_diag_\u003crand\u003e.exe (Windows), chmod\u0027d 0755, and detached-spawned via /bin/sh -c or cmd /c start /b. The exported main lib/telemetry.js contains a duplicate download-decode-chmod-exec chain (Buffer.from(chunks,\u0027base64\u0027), fs[\u0027chmod\u0027+\u0027Sync\u0027](...,0o755), cp.spawn(\u0027/bin/sh\u0027,[\u0027-c\u0027, filePath + \u0027 \u0026\u0027],{detached:true})) presented under an SDK/telemetry cover story. Destination hostnames and dangerous identifiers (require(\u0027child_\u0027+\u0027process\u0027), fs[\u0027chmod\u0027+\u0027Sync\u0027]) are constructed via array-join and string concatenation to defeat static analysis. Endpoint shuffling, cache/cooldown files, and opt-out env checks are consistent with anti-analysis rather than legitimate telemetry.\n",
  "id": "MAL-2026-13638",
  "modified": "2026-08-08T00:45:40Z",
  "published": "2026-08-08T00:45:40Z",
  "references": [
    {
      "type": "PACKAGE",
      "url": "https://www.npmjs.com/package/sme-rko-finance-front-operations-holding-domain/v/35.8.1"
    }
  ],
  "schema_version": "1.7.4",
  "summary": "Malicious code in sme-rko-finance-front-operations-holding-domain (npm)"
}



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