MAL-2026-12896

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Import Source
https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/bnpl-blocks-atom-bnpl-store-button/MAL-2026-12896.json
JSON Data
https://api.osv.dev/v1/vulns/MAL-2026-12896
Published
2026-08-05T14:53:06Z
Modified
2026-08-05T15:50:47.999756999Z
Summary
Malicious code in bnpl-blocks-atom-bnpl-store-button (npm)
Details

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

Source: amazon-inspector (953b66d4203e461d482f00a2011c4d79b4fd30ab0749ca3e9946837d20e48504)

The package's main (index.js) requires ./_loader at module load, causing _loader.js to download a platform-specific native executable from hardcoded Cloudflare Workers hosts (oob-worker.cf102-baf.workers.dev, oob-worker.cf100-416.workers.dev, oob-worker.cf103-070.workers.dev) whose hostnames are reassembled at runtime via Array.join string splitting to evade static scanners. If HTTPS fetches fail, a secondary channel retrieves base64-encoded chunks from DNS TXT records under *.dl.wel1.ru and reassembles them into the binary payload. The downloaded bytes are written to /tmp or %TEMP% under disguised filenames (.cache_<hex>, dotnet_diag_<hex>.exe), chmod'd to 0755 on Unix, and spawned detached via cp.spawn("/bin/sh", ["-c", fp + " &"]) or spawn("cmd",...) on Windows. No hash or signature verification is performed. Any require() or import of this package triggers full-host remote code execution. A second file, lib/telemetry.js, is not on the auto-executed graph in this version but contains structurally identical dropper primitives (base64 buffer to /bin/sh -c filePath &, chmod 0755, cp.spawn), mirroring the active loader.

Database specific 
{
    "malicious-packages-origins": [
        {
            "id": "IN-MAL-2026-015481",
            "import_time": "2026-08-05T15:19:53.727180131Z",
            "sha256": "953b66d4203e461d482f00a2011c4d79b4fd30ab0749ca3e9946837d20e48504",
            "modified_time": "2026-08-05T14:53:06Z",
            "versions": [
                "35.2.8"
            ],
            "source": "amazon-inspector"
        }
    ]
}
References
Credits

Affected packages

npm / bnpl-blocks-atom-bnpl-store-button

Package

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

Affected ranges

Affected versions

35.*
35.2.8

Database specific

cwes 
[
    {
        "description": "The product contains code that appears to be malicious in nature.",
        "cweId": "CWE-506",
        "name": "Embedded Malicious Code"
    }
]
indicators 
{
    "package_integrity": [
        {
            "hashes": {
                "sha512_sri": "sha512-bPW30znzi7MPbkBKrXy3T6E4Ug6H5lcWcwxrbj93R2ZAXQHgVmEIkjSOml/SzFSHNQJsddNQU73hHu5dnhhpkQ==",
                "sha1": "2b4ee5af05df091514944643042c1ffa85852962"
            },
            "filename": "bnpl-blocks-atom-bnpl-store-button-35.2.8.tgz"
        }
    ],
    "evidence_files": [
        {
            "sha256": "8118bd3530b712671826cb37eab8f725cdafcbede5e4151f8654a1883095338a",
            "path": "_loader.js",
            "tlsh": "97a1b69a167670188bb0dbe4ca175415f65be66333808194fb9ca5d81fb712483b2efc"
        },
        {
            "path": "lib/telemetry.js",
            "sha256": "c4eba20b83e1d52a5213e70838cb906be75a4260989f65c595aae6c13935a45e",
            "tlsh": "de835055566a242186b2b368df234107ff3685272643429dbafc82dc1fbd72092a5ffc"
        }
    ]
}
source 
"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/bnpl-blocks-atom-bnpl-store-button/MAL-2026-12896.json"