MAL-2026-12945

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Import Source
https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/bnpl-blocks-desktop-bnpl-title/MAL-2026-12945.json
JSON Data
https://api.osv.dev/v1/vulns/MAL-2026-12945
Published
2026-08-05T14:46:29Z
Modified
2026-08-05T15:51:10.386291039Z
Summary
Malicious code in bnpl-blocks-desktop-bnpl-title (npm)
Details

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

Source: amazon-inspector (f6b7a4e708d515244f25c6d9c5e01d39c6c6ae6fe47222e0305ef38bb9162eb0)

The package's main entry (index.js) requires support.js on load. support.js selects a platform-specific path, then downloads a binary over HTTPS from Cloudflare Worker hostnames that are reconstructed at runtime by joining split string fragments (oob-worker.cf100-416.workers.dev, oob-worker.cf102-baf.workers.dev, oob-worker.cf101-adf.workers.dev). If HTTPS retrieval fails, a fallback channel uses DNS TXT queries against *.dl.wel1.ru (c.<domain> for chunk count, i.<domain> for base64-encoded chunks) to reassemble the payload out-of-band. The downloaded bytes are written to /var/tmp or %TEMP% under deceptive names such as dotnetdiag<rand>.exe and.cache_<rand>, chmod'd 0755, and executed detached via /bin/sh -c "<path> &" or cmd.exe /c start. No hash or signature verification is performed. The advertised purpose ("bnpl title provider") has no relation to any of this behavior. A second file, lib/telemetry.js, is not currently required but contains structurally identical dropper primitives (base64 payload assembly, chmod 0755 via bracket-split property name, /bin/sh detached spawn of a downloaded file), staged for activation by a one-line require change.

Database specific 
{
    "malicious-packages-origins": [
        {
            "versions": [
                "35.7.9"
            ],
            "id": "IN-MAL-2026-015436",
            "import_time": "2026-08-05T15:19:51.313068347Z",
            "modified_time": "2026-08-05T14:46:29Z",
            "source": "amazon-inspector",
            "sha256": "f6b7a4e708d515244f25c6d9c5e01d39c6c6ae6fe47222e0305ef38bb9162eb0"
        }
    ]
}
References
Credits

Affected packages

npm / bnpl-blocks-desktop-bnpl-title

Package

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

Affected ranges

Affected versions

35.*
35.7.9

Database specific

cwes 
[
    {
        "cweId": "CWE-506",
        "name": "Embedded Malicious Code",
        "description": "The product contains code that appears to be malicious in nature."
    }
]
source 
"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/bnpl-blocks-desktop-bnpl-title/MAL-2026-12945.json"
indicators 
{
    "package_integrity": [
        {
            "hashes": {
                "sha512_sri": "sha512-62zXhwNCBD4vfUSX0gpPf/3yWMCfXr1bWIEpeJ1iLcC2hlH2NZ0HDqry1VI1dW/uryt35819iNNWwKXzzlV9yg==",
                "sha1": "fe7fa5d8b626882e78bf76d0373c62508651d279"
            },
            "filename": "bnpl-blocks-desktop-bnpl-title-35.7.9.tgz"
        }
    ],
    "evidence_files": [
        {
            "path": "_support.js",
            "tlsh": "e7a1859a16a670184ab0e7e0c71b8829f51bf5633781c2d4fb9c65985f7352483b2dfc",
            "sha256": "de779fb55e6f9e58142f27747b84b0a59d9bfa2f6d2d1b5b01204f042624461e"
        },
        {
            "path": "lib/telemetry.js",
            "tlsh": "0e835055566a242186b2b368df234107ff3685272643429dbafc82dc1fbd72092a5ffc",
            "sha256": "2af671a9d2b21d71f831dcd976705caed5524e6fcf38d2bedb6ffa5c323b31fe"
        }
    ]
}