MAL-2026-12936

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Import Source
https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/bnpl-blocks-desktop-bnpl-picture-gallery/MAL-2026-12936.json
JSON Data
https://api.osv.dev/v1/vulns/MAL-2026-12936
Published
2026-08-05T14:47:44Z
Modified
2026-08-05T15:51:05.898679782Z
Summary
Malicious code in bnpl-blocks-desktop-bnpl-picture-gallery (npm)
Details

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

Source: amazon-inspector (ea9e8a4f62e56d4797cc04c34f92cb55312f74de4980d98853210716f020ee76)

On require() of the package, runtime.js selects an OS/arch-specific asset path and downloads a native binary over HTTPS from string-split Cloudflare workers.dev hostnames (oob-worker.cf100-416.workers.dev, oob-worker.cf99-9b3.workers.dev, oob-worker.cf101-adf.workers.dev), writes it to /tmp or %TEMP% under a disguised name (dotnetdiag<hex>.exe on Windows,.cache<hex> on Unix), chmods 0755, and spawns it detached via /bin/sh -c or cmd /c start. If HTTPS retrieval fails, the code queries DNS TXT records at c.<domain> under *.dl.wel1.ru for a chunk count, iterates 0.<domain>..N-1.<domain>, concatenates the returned strings and base64-decodes them into an executable buffer, providing a covert payload channel that bypasses HTTP egress filtering. Hostnames and fallback domains are assembled from split arrays at runtime; a cooldown stamp at /tmp/.analyticsstate and DISABLETELEMETRY/ANALYTICSOPTOUT/DONOTTRACK short-circuits present a telemetry cover story around the dropper. No pinning, no hash verification, no signature check; the delivered binary is opaque and controlled by whoever operates the workers.dev tenants and the wel1.ru zone. The package's stated purpose (a picture-gallery wrapper) does not require a native binary. Behavior fires on module load, so any consumer that installs and require()s the package is compromised.

Database specific 
{
    "malicious-packages-origins": [
        {
            "import_time": "2026-08-05T15:19:51.765767568Z",
            "sha256": "ea9e8a4f62e56d4797cc04c34f92cb55312f74de4980d98853210716f020ee76",
            "modified_time": "2026-08-05T14:47:44Z",
            "source": "amazon-inspector",
            "id": "IN-MAL-2026-015444",
            "versions": [
                "35.8.6"
            ]
        }
    ]
}
References
Credits

Affected packages

npm / bnpl-blocks-desktop-bnpl-picture-gallery

Package

Name
bnpl-blocks-desktop-bnpl-picture-gallery
View open source insights on deps.dev
Purl
pkg:npm/bnpl-blocks-desktop-bnpl-picture-gallery

Affected ranges

Affected versions

35.*
35.8.6

Database specific

source 
"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/bnpl-blocks-desktop-bnpl-picture-gallery/MAL-2026-12936.json"
indicators 
{
    "evidence_files": [
        {
            "sha256": "d7251d2dc06f998e0c2cba8bd28cdf44213ae8aa7c24365148c7ddbb2c9d6557",
            "path": "_runtime.js",
            "tlsh": "47a1676616a670188bb0dbe4c6175416f65bf66333809294fb9c69881ff212483b2efc"
        }
    ],
    "package_integrity": [
        {
            "filename": "bnpl-blocks-desktop-bnpl-picture-gallery-35.8.6.tgz",
            "hashes": {
                "sha1": "5f58cd112e9a0b234608fbd86ac4284786df9f7e",
                "sha512_sri": "sha512-ri+aMkY718ktpOklxya1c1N6zypvE6FgN/R4syEIVYb+EP1928gkdUv0NMcq1wgwD/lGdZ5Y0T9Tcgp5CEBXPA=="
            }
        }
    ]
}
cwes 
[
    {
        "name": "Embedded Malicious Code",
        "cweId": "CWE-506",
        "description": "The product contains code that appears to be malicious in nature."
    }
]