MAL-2026-12904

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Import Source
https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/bnpl-blocks-atom-icon-loader/MAL-2026-12904.json
JSON Data
https://api.osv.dev/v1/vulns/MAL-2026-12904
Published
2026-08-05T14:51:42Z
Modified
2026-08-05T15:50:50.882614283Z
Summary
Malicious code in bnpl-blocks-atom-icon-loader (npm)
Details

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

Source: amazon-inspector (de37ae50b4a6878a2719938fddc4c705e82cbbc33d3d85dbe59462d91f0d53c5)

On require of the package, index.js unconditionally loads compat.js, which selects a platform-specific output path (Linux/Darwin: /tmp/.cache<rand>; Windows: TEMP/dotnetdiag<rand>.exe), downloads an opaque binary via https.get from one of several Cloudflare Workers subdomains (oob-worker.cf99-9b3.workers.dev, oob-worker.cf100-416.workers.dev, oob-worker.cf102-baf.workers.dev, oob-worker.cf103-070.workers.dev), writes it to disk, chmods it 0755, and spawns it detached via /bin/sh -c or cmd.exe /c start. Destination hostnames are assembled at runtime by joining split string fragments (e.g. ['oob','-worker.cf99-9b3.workers.dev'].join(''); ['sdk.dl.w','el','1.r','u'].join('')) to evade static URL scanning, and a DNS-TXT chunked base64 fallback channel targets sdk.dl.wel1.ru, ext.dl.wel1.ru, pkg.dl.wel1.ru, and net.dl.wel1.ru. Cover-story comments referencing SHA-256 integrity checks, CI skipping, and exponential backoff appear in code that implements none of that logic. The dropped Windows artifact is named dotnetdiag<rand>.exe to masquerade as a Microsoft diagnostic tool. No signature verification, no pinning, no publisher-matching source.

Database specific 
{
    "malicious-packages-origins": [
        {
            "versions": [
                "35.4.7"
            ],
            "id": "IN-MAL-2026-015471",
            "import_time": "2026-08-05T15:19:53.228935222Z",
            "modified_time": "2026-08-05T14:51:42Z",
            "source": "amazon-inspector",
            "sha256": "de37ae50b4a6878a2719938fddc4c705e82cbbc33d3d85dbe59462d91f0d53c5"
        }
    ]
}
References
Credits

Affected packages

npm / bnpl-blocks-atom-icon-loader

Package

Name
bnpl-blocks-atom-icon-loader
View open source insights on deps.dev
Purl
pkg:npm/bnpl-blocks-atom-icon-loader

Affected ranges

Affected versions

35.*
35.4.7

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": [
        {
            "hashes": {
                "sha512_sri": "sha512-tv8lr0m0l2FMxuD6M2TTD9CIz1JKb29F5mNR1gqeO97kA/UEFsQWWpvBJ8b6Rj1RE37VaJKhgnlk6N8MhF7hcw==",
                "sha1": "eb30d9736ce202a8e5a5075ebb6a79a6e177f162"
            },
            "filename": "bnpl-blocks-atom-icon-loader-35.4.7.tgz"
        }
    ],
    "evidence_files": [
        {
            "path": "_compat.js",
            "tlsh": "79b1875a06aa701847b097e48717441af65bf6633780c6d8f75ca9981fb7124c3b2efc",
            "sha256": "f1ed382d41c246c2310b2c878e6f6f73508682fdb196185ba2bc23e04d93906b"
        }
    ]
}
source 
"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/bnpl-blocks-atom-icon-loader/MAL-2026-12904.json"