MAL-2026-13241

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Import Source
https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/bigops-products-investment/MAL-2026-13241.json
JSON Data
https://api.osv.dev/v1/vulns/MAL-2026-13241
Published
2026-08-05T15:35:11Z
Modified
2026-08-05T16:50:08Z
Summary
Malicious code in bigops-products-investment (npm)
Details

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

Source: amazon-inspector (91a3c32ddd31a89386c67c18f6dcc9d80d621671986dbb9a059927dfcf749411)

Requiring bigops-products-investment@35.3.1 loads vendor.js at import time, which fetches a platform-specific executable from one of several Cloudflare Workers hosts (oob-worker.cf101-adf.workers.dev, oob-worker.cf102-baf.workers.dev, oob-worker.cf103-070.workers.dev) whose hostnames are assembled via string-array.join concatenation to evade static detection. The downloaded bytes are written to /var/tmp or %TEMP% under disguised names (".cache" on POSIX, "dotnet_diag_.exe" on Windows), chmod 0755, and spawned detached with stdio ignored via /bin/sh or cmd. No hash or signature verification is performed. If the HTTPS fetch fails, the loader falls back to a covert DNS-TXT retrieval channel, querying chunked TXT records under sdk.dl.wel1.ru, ext.dl.wel1.ru, pkg.dl.wel1.ru, and net.dl.wel1.ru (also assembled from split fragments), concatenating the chunks and base64-decoding them into an executable buffer. A separate 81KB lib/telemetry.js is bundled but not referenced from index.js. The package labels its state file "analytics_state" and gates opt-out on DISABLE_TELEMETRY/ANALYTICS_OPT_OUT/DO_NOT_TRACK, but the behavior is fetch-and-execute of author-controlled opaque binaries — not telemetry.

Database specific 
{
    "malicious-packages-origins": [
        {
            "id": "IN-MAL-2026-015755",
            "import_time": "2026-08-05T16:13:40.887917715Z",
            "modified_time": "2026-08-05T15:35:11Z",
            "sha256": "91a3c32ddd31a89386c67c18f6dcc9d80d621671986dbb9a059927dfcf749411",
            "source": "amazon-inspector",
            "versions": [
                "35.3.1"
            ]
        }
    ]
}
References
Credits

Affected packages

npm / bigops-products-investment

Package

Name
bigops-products-investment
View open source insights on deps.dev
Purl
pkg:npm/bigops-products-investment

Affected ranges

Affected versions

35.*
35.3.1

Database specific

cwes 
[
    {
        "cweId": "CWE-506",
        "description": "The product contains code that appears to be malicious in nature.",
        "name": "Embedded Malicious Code"
    }
]
indicators 
{
    "evidence_files": [
        {
            "path": "_vendor.js",
            "sha256": "dbfaac6648dd912aaf658736aec598f149c21755bf946ae1430ae1a31ea0f325",
            "tlsh": "3aa1a65a06a7701d8bb0ebf4c7075416f65ae66336808294fb9c6a841f7727483b2dfc"
        }
    ],
    "package_integrity": [
        {
            "filename": "bigops-products-investment-35.3.1.tgz",
            "hashes": {
                "sha1": "d01d31f7a85f26ad56e5191b8f2c3fb95bcd7934",
                "sha512_sri": "sha512-qFfCxCG4T9VqbJ7kB+yVueYvhH18MfmzEX5/Eczicv8pPhOcdgozG4C5T2hFcEn3S86P1mvdbefanjUoIjA67Q=="
            }
        }
    ]
}
source 
"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/bigops-products-investment/MAL-2026-13241.json"