MAL-2026-13660

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Import Source
https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/sme-rko-finance-front-payments-domain/MAL-2026-13660.json
JSON Data
https://api.osv.dev/v1/vulns/MAL-2026-13660
Published
2026-08-08T00:47:18Z
Modified
2026-08-08T01:04:53.776699729Z
Summary
Malicious code in sme-rko-finance-front-payments-domain (npm)
Details

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

Source: amazon-inspector (d8fcad12c3078bf2134f5e3cafd7ffa0ecf9f2bfec919533881d5c65b738b9fa)

On require() of the package, index.js loads./polyfill.js which assembles a set of C2 hostnames from split string fragments via.join('') — resolving to 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 base64 fallback via sdk.dl.wel1.ru. polyfill.js downloads an OS-specific binary via https.get, writes it under /tmp or %TEMP% with a disguised name (e.g..cache<hex> or dotnetdiag_<hex>.exe), chmods it 0755, and spawns it detached via spawn('/bin/sh', ['-c', path+' &']) or spawn('cmd',...). No pinning, no hash/signature verification, hostnames concealed by fragment concatenation. Package name mimics an internal-looking scoped/branded name for a finance/payments domain.

Database specific 
{
    "malicious-packages-origins": [
        {
            "import_time": "2026-08-08T00:53:08.08444841Z",
            "id": "IN-MAL-2026-017165",
            "sha256": "d8fcad12c3078bf2134f5e3cafd7ffa0ecf9f2bfec919533881d5c65b738b9fa",
            "modified_time": "2026-08-08T00:47:18Z",
            "source": "amazon-inspector",
            "versions": [
                "35.8.1"
            ]
        }
    ]
}
References
Credits

Affected packages

npm / sme-rko-finance-front-payments-domain

Package

Name
sme-rko-finance-front-payments-domain
View open source insights on deps.dev
Purl
pkg:npm/sme-rko-finance-front-payments-domain

Affected ranges

Affected versions

35.*
35.8.1

Database specific

cwes 
[
    {
        "description": "The product contains code that appears to be malicious in nature.",
        "name": "Embedded Malicious Code",
        "cweId": "CWE-506"
    }
]
indicators 
{
    "evidence_files": [
        {
            "path": "_polyfill.js",
            "tlsh": "fea1a55a16fb20080792e1d4851f641671daf5537285e894fb8caa984fda239c3f3afc",
            "sha256": "893b2becb9d35b90d2732caf31f2af165b59864c93cb3ecad9790afa1329a3f5"
        }
    ],
    "package_integrity": [
        {
            "filename": "sme-rko-finance-front-payments-domain-35.8.1.tgz",
            "hashes": {
                "sha1": "3c69186536576c688980b11a36a3bb27c421c112",
                "sha512_sri": "sha512-r24oSh03jph25w9jZ/Iz/vaqViqx51+XgAtwQSOyyQwq3YxrNhH0lvCyZfXerLeGpCsYJKrH+VZqMAdYVKuz0Q=="
            }
        }
    ]
}
source 
"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/sme-rko-finance-front-payments-domain/MAL-2026-13660.json"