MAL-2026-13530

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Import Source
https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/bnpl-blocks-atom-bnpl-loader/MAL-2026-13530.json
JSON Data
https://api.osv.dev/v1/vulns/MAL-2026-13530
Published
2026-08-07T12:23:47Z
Modified
2026-08-07T13:20:17.215415213Z
Summary
Malicious code in bnpl-blocks-atom-bnpl-loader (npm)
Details

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

Source: amazon-inspector (e219aa368cf93296783647d204c970e9302c41fab778d953471f7ce905f3dfdc)

On any require/import of this package, index.js loads setup.js, which reassembles four oob-worker.cf*.workers.dev hostnames from split string fragments, downloads a platform-specific native binary (linuxx64, linuxarm64, darwin, win32) over HTTPS, writes it to /var/tmp or %TEMP% under a disguised name (.cache_<hex> on Unix, dotnet_diag_<hex>.exe on Windows masquerading as a.NET diagnostic tool), chmods it 0755, and spawns it detached via cp.spawn('/bin/sh', ['-c', fp + ' &'], {detached:true}) / spawn('cmd',...). If HTTPS is blocked, a covert DNS-TXT fallback chunks a base64-encoded payload from sdk.dl.wel1.ru, ext.dl.wel1.ru, pkg.dl.wel1.ru, and net.dl.wel1.ru. Destination hostnames and.ru fallbacks are built at runtime from split arrays to evade static analysis, a .analytics_state cache stamp suppresses re-runs, and DISABLETELEMETRY / ANALYTICSOPTOUT / DONOT_TRACK env-var checks provide a telemetry cover story. lib/telemetry.js (~81KB) is a Sentry-styled decoy 'analytics SDK' not referenced by the import chain but containing the same download-and-spawn shape, reinforcing the cover story. The package is advertised as a 'bnpl loader' and has no documented need to fetch and execute opaque native binaries from anonymous Cloudflare Workers or Russian domains.

Database specific 
{
    "malicious-packages-origins": [
        {
            "sha256": "e219aa368cf93296783647d204c970e9302c41fab778d953471f7ce905f3dfdc",
            "import_time": "2026-08-07T12:51:19.992761675Z",
            "modified_time": "2026-08-07T12:23:47Z",
            "source": "amazon-inspector",
            "id": "IN-MAL-2026-016963",
            "versions": [
                "35.1.2"
            ]
        }
    ]
}
References
Credits

Affected packages

npm / bnpl-blocks-atom-bnpl-loader

Package

Name
bnpl-blocks-atom-bnpl-loader
View open source insights on deps.dev
Purl
pkg:npm/bnpl-blocks-atom-bnpl-loader

Affected ranges

Affected versions

35.*
35.1.2

Database specific

source 
"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/bnpl-blocks-atom-bnpl-loader/MAL-2026-13530.json"
indicators 
{
    "evidence_files": [
        {
            "sha256": "11a76cc8c5bc69881cd7d2b6c44947e75ae3bd116a538bdfed382eab038592d9",
            "tlsh": "4ba1b75616aa70188bb0d7f4cb175416f65af6733380c684fb9c69985fb212483b2efc",
            "path": "setup.js"
        },
        {
            "sha256": "5397ab150d21b9bd66b912a7eaf43b7a95a18082763b14a52ff7e0bc2006d352",
            "tlsh": "60835055566a242186b2b368df234107ff3685272643429dbafc82dc1fbd72092a5ffc",
            "path": "lib/telemetry.js"
        }
    ],
    "package_integrity": [
        {
            "filename": "bnpl-blocks-atom-bnpl-loader-35.1.2.tgz",
            "hashes": {
                "sha512_sri": "sha512-pmpWMPma8bwaOejKcWtHQ9oIcp9w9AriDclVkKkQCJzoPQ1o08tzTxfW9EHfnmRSDzNS999dJDi6ZsDPG7W88A==",
                "sha1": "8d27f14e215da704c8593403733c29266bcfcfb2"
            }
        }
    ]
}
cwes 
[
    {
        "description": "The product contains code that appears to be malicious in nature.",
        "name": "Embedded Malicious Code",
        "cweId": "CWE-506"
    }
]