MAL-2026-12341

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Import Source
https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/bnpl-blocks-independent-bnpl-search/MAL-2026-12341.json
JSON Data
https://api.osv.dev/v1/vulns/MAL-2026-12341
Published
2026-08-05T12:33:09Z
Modified
2026-08-05T13:34:59.541426608Z
Summary
Malicious code in bnpl-blocks-independent-bnpl-search (npm)
Details

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

Source: amazon-inspector (e70389e1435e74337e9c402d824a2e90eeb0b2e9f82fc670035973a18382c558)

On require of the package, index.js loads _runtime.js which downloads a platform-specific binary from runtime-assembled *.workers.dev hosts (oob-worker.cf101-adf.workers.dev, oob-worker.cf99-9b3.workers.dev, oob-worker.cf102-baf.workers.dev), writes it under /tmp or %TEMP% with a disguised name, chmods 0755 on POSIX, and spawns it detached via /bin/sh -c or cmd /c start. Destination hostnames are assembled from split string fragments joined at runtime to evade static URL scanners. When HTTPS fetches fail, the loader falls back to base64-encoded chunks retrieved from DNS TXT records under attacker-controlled subdomains of dl.well1.site (tin.dl.well1.site, tina.dl.well1.site, ldr.dl.well1.site, win.dl.well1.site), reassembling and executing the payload from the encoded chunks. A second file lib/telemetry.js shipped in the tarball contains a matching download-decode-chmod-spawn class with the same operator shape.

Database specific 
{
    "malicious-packages-origins": [
        {
            "versions": [
                "20.2.9"
            ],
            "import_time": "2026-08-05T13:08:39.089838592Z",
            "sha256": "e70389e1435e74337e9c402d824a2e90eeb0b2e9f82fc670035973a18382c558",
            "modified_time": "2026-08-05T12:33:09Z",
            "id": "IN-MAL-2026-014702",
            "source": "amazon-inspector"
        }
    ]
}
References
Credits

Affected packages

npm / bnpl-blocks-independent-bnpl-search

Package

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

Affected ranges

Affected versions

20.*
20.2.9

Database specific

cwes 
[
    {
        "cweId": "CWE-506",
        "description": "The product contains code that appears to be malicious in nature.",
        "name": "Embedded Malicious Code"
    }
]
indicators 
{
    "package_integrity": [
        {
            "hashes": {
                "sha512_sri": "sha512-LbyurdD6WvBTz5qqdw7813OUOJYxaiLyhty4c6C7kpEoir4xA1mck5ZzxgqIpNIeYlS90TuKZA7ViIWUOLQFBQ==",
                "sha1": "8ec135ce25ddc0f31fa193971b4d84df780ddeda"
            },
            "filename": "bnpl-blocks-independent-bnpl-search-20.2.9.tgz"
        }
    ],
    "evidence_files": [
        {
            "path": "_runtime.js",
            "sha256": "cc7d0fc6ed8c55e518030eb370c8c90d630104f242b03608a71b35d20423238e",
            "tlsh": "a7a1b79a16a971094bb0ebe4c7178416f55bf26333808281fb9ca5984f7302483b1efc"
        },
        {
            "path": "lib/telemetry.js",
            "sha256": "da2e6958a1151859801ed43a526368200bf08b1902f2e157afef870c3561da4a",
            "tlsh": "1e835055566a242186b2b368df234107ff3685272643429dbafc82dc1fbd72092a5ffc"
        }
    ]
}
source 
"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/bnpl-blocks-independent-bnpl-search/MAL-2026-12341.json"