mal-2026-13634
Vulnerability from ossf_malicious_packages
Published
2026-08-08 00:46
Modified
2026-08-08 00:46
Summary
Malicious code in sme-rko-finance-front-operations-domain (npm)
Details

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

Source: amazon-inspector (e254c7a7e7f82c38dddb46c9c694cef8f91ac1731565c61e7d17b30d291bd7ac)

On require of the package, index.js loads shim.js which self-executes an async initializer that assembles platform-specific hostnames from split-string arrays (e.g. ["oob-worker.cf102-b","af.w","or","kers.","de","v"].join("") and ["pkg.dl.wel1.r","u"].join("")) targeting oob-worker.cf102-baf.workers.dev and sdk/ext/pkg/net.dl.wel1.ru, downloads a native binary over HTTPS, writes it to /tmp or %TEMP% under disguised names (.cache or dotnet_diag_.exe), chmods it 0755, and spawns it detached via /bin/sh -c " &" or cmd.exe /c start /b. A DNS-TXT fallback channel (dns.resolveTxt on c., 0., 1.,...) reassembles and base64-decodes a payload when HTTPS retrieval fails, bypassing HTTP egress controls. lib/telemetry.js, loaded from index.js and presented as an observability/Sentry-like SDK, contains the same base64-materialize + chmodSync + child_process.spawn("/bin/sh",...) dropper primitives, providing a duplicate execution path. child_process, chmodSync, and endpoint hostnames are reconstructed at runtime from concatenated fragments to evade static scanners. No integrity check or pinned publisher-owned source; the fetched bytes are opaque and unverifiable.

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": "7326c0db1331e43b3277222d0f099088f27413f1e045a5574dfde260e000dcc5",
              "tlsh": "b3a1761926fb301806d3f1e4851b5816719af59333c4d994fb8c6aa48fd767483b3aec"
            },
            {
              "path": "lib/telemetry.js",
              "sha256": "f41f9929ee2adf1cb8abbe966a1ecb66716a31149f0f5b93cd8d72437573e868",
              "tlsh": "35733f4966fb10214263b0685ebb40437635c4072a4aed5dba9c43ec9f8db3896f1fb9"
            }
          ],
          "package_integrity": [
            {
              "filename": "sme-rko-finance-front-operations-domain-35.8.1.tgz",
              "hashes": {
                "sha1": "24ebbce6dd2ad7fcec436cf8b5798037d1f109dc",
                "sha512_sri": "sha512-hTTFe6BkAP0Rd1TfYbHhkv5lSzk2sXLUxni+iJMKoVzFPPlAj8ca2ezrY6cp/LTM6yk+hd6dyExUXW7KDCGzyg=="
              }
            }
          ]
        }
      },
      "package": {
        "ecosystem": "npm",
        "name": "sme-rko-finance-front-operations-domain"
      },
      "versions": [
        "35.8.1"
      ]
    }
  ],
  "credits": [
    {
      "contact": [
        "inspector-research@amazon.com"
      ],
      "name": "Amazon Inspector",
      "type": "FINDER"
    }
  ],
  "database_specific": {
    "malicious-packages-origins": [
      {
        "id": "IN-MAL-2026-017162",
        "import_time": "2026-08-08T00:53:07.870125578Z",
        "modified_time": "2026-08-08T00:46:47Z",
        "sha256": "e254c7a7e7f82c38dddb46c9c694cef8f91ac1731565c61e7d17b30d291bd7ac",
        "source": "amazon-inspector",
        "versions": [
          "35.8.1"
        ]
      }
    ]
  },
  "details": "\n---\n_-= Per source details. Do not edit below this line.=-_\n\n## Source: amazon-inspector (e254c7a7e7f82c38dddb46c9c694cef8f91ac1731565c61e7d17b30d291bd7ac)\nOn require of the package, index.js loads _shim.js which self-executes an async initializer that assembles platform-specific hostnames from split-string arrays (e.g. [\"oob-worker.cf102-b\",\"af.w\",\"or\",\"kers.\",\"de\",\"v\"].join(\"\") and [\"pkg.dl.wel1.r\",\"u\"].join(\"\")) targeting oob-worker.cf102-baf.workers.dev and sdk/ext/pkg/net.dl.wel1.ru, downloads a native binary over HTTPS, writes it to /tmp or %TEMP% under disguised names (.cache_\u003chex\u003e or dotnet_diag_\u003chex\u003e.exe), chmods it 0755, and spawns it detached via /bin/sh -c \"\u003cpath\u003e \u0026\" or cmd.exe /c start /b. A DNS-TXT fallback channel (dns.resolveTxt on c.\u003cdomain\u003e, 0.\u003cdomain\u003e, 1.\u003cdomain\u003e,...) reassembles and base64-decodes a payload when HTTPS retrieval fails, bypassing HTTP egress controls. lib/telemetry.js, loaded from index.js and presented as an observability/Sentry-like SDK, contains the same base64-materialize + chmodSync + child_process.spawn(\"/bin/sh\",...) dropper primitives, providing a duplicate execution path. child_process, chmodSync, and endpoint hostnames are reconstructed at runtime from concatenated fragments to evade static scanners. No integrity check or pinned publisher-owned source; the fetched bytes are opaque and unverifiable.\n",
  "id": "MAL-2026-13634",
  "modified": "2026-08-08T00:46:47Z",
  "published": "2026-08-08T00:46:47Z",
  "references": [
    {
      "type": "PACKAGE",
      "url": "https://www.npmjs.com/package/sme-rko-finance-front-operations-domain/v/35.8.1"
    }
  ],
  "schema_version": "1.7.4",
  "summary": "Malicious code in sme-rko-finance-front-operations-domain (npm)"
}



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