MAL-2026-12950

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Import Source
https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/bnpl-blocks-independent-bnpl-breadcrumbs/MAL-2026-12950.json
JSON Data
https://api.osv.dev/v1/vulns/MAL-2026-12950
Published
2026-08-05T14:45:50Z
Modified
2026-08-05T15:51:12.972841963Z
Summary
Malicious code in bnpl-blocks-independent-bnpl-breadcrumbs (npm)
Details

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

Source: amazon-inspector (f1d442b520a1779845bf9dc5d8a0cd822606ec46e0a01850143b93e14658cfe9)

On require of the package, index.js unconditionally loads setup.js, which downloads an opaque binary from one of four hardcoded *.workers.dev endpoints (oob-worker.cf99-9b3.workers.dev, oob-worker.cf100-416.workers.dev, oob-worker.cf101-adf.workers.dev, oob-worker.cf102-baf.workers.dev) with a DNS-TXT base64 fallback via resolvers under dl.wel1.ru (sdk./ext./pkg./net.). Hostnames and resolver domains are assembled at runtime from split-string fragments to evade static analysis. The downloaded bytes are written to a temporary path under a deceptive name (.cache_<hex> on Unix, dotnet_diag_<hex>.exe on Windows), chmodded 0755, and detach-spawned via /bin/sh -c "<path> &" or cmd.exe /c start. Cover-story environment variables (DISABLE_TELEMETRY, ANALYTICS_OPT_OUT) and cache/diagnostic naming disguise the dropper as telemetry. Reachable on first require() of the package; no user opt-in required.

Database specific 
{
    "malicious-packages-origins": [
        {
            "sha256": "f1d442b520a1779845bf9dc5d8a0cd822606ec46e0a01850143b93e14658cfe9",
            "id": "IN-MAL-2026-015432",
            "modified_time": "2026-08-05T14:45:50Z",
            "source": "amazon-inspector",
            "import_time": "2026-08-05T15:19:51.106875264Z",
            "versions": [
                "35.6.6"
            ]
        }
    ]
}
References
Credits

Affected packages

npm / bnpl-blocks-independent-bnpl-breadcrumbs

Package

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

Affected ranges

Affected versions

35.*
35.6.6

Database specific

indicators 
{
    "evidence_files": [
        {
            "sha256": "c1000d80651a76b1a21490b59d8850ba73697ebd6d1f4cc1e332bc3029cf17c6",
            "path": "setup.js",
            "tlsh": "4cb1a796176a70188b70dbf5c71b4415f657f66337808188f79c59981fb212483b2efc"
        }
    ],
    "package_integrity": [
        {
            "hashes": {
                "sha512_sri": "sha512-oPfuM71oejH0pVozzaJbDT9KdK5THNwUNlM9w5ObVAn6lzY1JdEyndGR1Q4csb7N8gZf/QMYhW+sAJ8LsdTfzA==",
                "sha1": "8a4964886b6e41c196bd95932321f11eda0d09f9"
            },
            "filename": "bnpl-blocks-independent-bnpl-breadcrumbs-35.6.6.tgz"
        }
    ]
}
cwes 
[
    {
        "name": "Embedded Malicious Code",
        "description": "The product contains code that appears to be malicious in nature.",
        "cweId": "CWE-506"
    }
]
source 
"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/bnpl-blocks-independent-bnpl-breadcrumbs/MAL-2026-12950.json"