MAL-2026-13524

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Import Source
https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/bigops-abstract-entity-data/MAL-2026-13524.json
JSON Data
https://api.osv.dev/v1/vulns/MAL-2026-13524
Published
2026-08-07T12:27:27Z
Modified
2026-08-07T13:20:14.690247515Z
Summary
Malicious code in bigops-abstract-entity-data (npm)
Details

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

Source: amazon-inspector (294402f19750cb519f7bdcf28e24e057513e0fc59cbfa4bc8e24a39b93832351)

index.js unconditionally requires./loader on module load. loader.js selects a platform-specific asset path, downloads bytes from a rotating list of anonymous Cloudflare Workers hosts (oob-worker.cf101-.workers.dev, oob-worker.cf102-.workers.dev, oob-worker.cf103-*.workers.dev, cf99-9b3.workers.dev) with a DNS-TXT chunked fallback resolved under *.dl.wel1.ru, writes the bytes to /tmp or %TEMP% under decoy names (.cache<rand> on Unix, dotnetdiag_<rand>.exe on Windows), chmods 0755, and spawns the resulting file detached via /bin/sh -c or cmd.exe /c start /b. Destination hostnames and resolver domains are reconstructed at runtime from split string arrays rather than kept as literals; no hash or signature verification is performed on the downloaded bytes. Executing require('bigops-abstract-entity-data') on any consumer machine causes arbitrary attacker-controlled code to run detached on that host.

Database specific 
{
    "malicious-packages-origins": [
        {
            "sha256": "294402f19750cb519f7bdcf28e24e057513e0fc59cbfa4bc8e24a39b93832351",
            "source": "amazon-inspector",
            "modified_time": "2026-08-07T12:27:27Z",
            "versions": [
                "35.1.7"
            ],
            "import_time": "2026-08-07T12:51:21.133152978Z",
            "id": "IN-MAL-2026-016988"
        }
    ]
}
References
Credits

Affected packages

npm / bigops-abstract-entity-data

Package

Name
bigops-abstract-entity-data
View open source insights on deps.dev
Purl
pkg:npm/bigops-abstract-entity-data

Affected ranges

Affected versions

35.*
35.1.7

Database specific

indicators 
{
    "package_integrity": [
        {
            "hashes": {
                "sha1": "4f3c55100a6ae9122ef0487ecf912bd4eacab111",
                "sha512_sri": "sha512-BkHab2t81q5/tgMckvsigqFsDVh40G2exozBi0OJiwBb55zbt4GRGbNbOhle2KSd89UZal6DrJb28aDsrddHiw=="
            },
            "filename": "bigops-abstract-entity-data-35.1.7.tgz"
        }
    ],
    "evidence_files": [
        {
            "path": "_loader.js",
            "sha256": "7a97c9824ffe15c7c00044b29d8fa46d5d3869104a987719ab412adbf0d12216",
            "tlsh": "c3a1549a166a71194bb0abf4871b4419f65bf76323808294f75ca9942fb312483b1efc"
        }
    ]
}
cwes 
[
    {
        "description": "The product contains code that appears to be malicious in nature.",
        "cweId": "CWE-506",
        "name": "Embedded Malicious Code"
    }
]
source 
"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/bigops-abstract-entity-data/MAL-2026-13524.json"