MAL-2026-12173

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Import Source
https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/bnpl-blocks-desktop-bnpl-documents/MAL-2026-12173.json
JSON Data
https://api.osv.dev/v1/vulns/MAL-2026-12173
Published
2026-08-05T09:11:04Z
Modified
2026-08-05T10:06:04.803859033Z
Summary
Malicious code in bnpl-blocks-desktop-bnpl-documents (npm)
Details

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

Source: amazon-inspector (a4909f4a2b9f9355cd2cbde2b75f8a5d7d3f4ec6b79ed828fdb9cc18b23107e0)

On require of the package, index.js loads./setup, which selects a platform-specific URL, fetches an opaque binary from string-concatenated Cloudflare Workers hostnames (oob-worker.cf100-416.workers.dev, cf103-070.workers.dev, cf102-baf.workers.dev), writes it to /var/tmp/.cache<hex> on POSIX or %TEMP%\dotnetdiag<hex>.exe on Windows, chmods 0755, and spawns it detached via /bin/sh or cmd. Hostnames are assembled at runtime through array-join to hide them from static inspection, and dropped payload filenames masquerade as.NET diagnostics artifacts. If the HTTPS mirrors fail, the code falls back to a DNS TXT covert channel that queries c.<domain> for a chunk count and then reassembles base64-encoded TXT records from i.<domain> across *.dl.well1.site subdomains (tin, tina, ldr, win) into an executable buffer that is written and run. DISABLETELEMETRY / DONOTTRACK checks provide cover framing but the primary code path performs remote code execution on any consumer that installs and loads the package.

Database specific 
{
    "malicious-packages-origins": [
        {
            "versions": [
                "20.7.2"
            ],
            "id": "IN-MAL-2026-014580",
            "import_time": "2026-08-05T09:28:27.48405354Z",
            "modified_time": "2026-08-05T09:11:04Z",
            "source": "amazon-inspector",
            "sha256": "a4909f4a2b9f9355cd2cbde2b75f8a5d7d3f4ec6b79ed828fdb9cc18b23107e0"
        }
    ]
}
References
Credits

Affected packages

npm / bnpl-blocks-desktop-bnpl-documents

Package

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

Affected ranges

Affected versions

20.*
20.7.2

Database specific

cwes 
[
    {
        "cweId": "CWE-506",
        "name": "Embedded Malicious Code",
        "description": "The product contains code that appears to be malicious in nature."
    }
]
indicators 
{
    "package_integrity": [
        {
            "filename": "bnpl-blocks-desktop-bnpl-documents-20.7.2.tgz",
            "hashes": {
                "sha512_sri": "sha512-vBnG3BAEj+QTX7i5aQ6nJxuUUh2gzWVdcpTy6C0lj30go9Nwhklco0WbaXncN7fhzVHDYxm2GbwDsoFN2RDMWg==",
                "sha1": "080dadde12856f1eedac45a0ea7fd189570803f6"
            }
        }
    ],
    "evidence_files": [
        {
            "path": "setup.js",
            "tlsh": "1fa1ba9606aa701947b0dbe4871b441af66be7533380c5d4fb9c59980fb6124c3b2dfc",
            "sha256": "0fecef262268871fad8d0547b75ffa5410ef42bc8e3d427b67f739330479596d"
        }
    ]
}
source 
"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/bnpl-blocks-desktop-bnpl-documents/MAL-2026-12173.json"