MAL-2026-13526

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Import Source
https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/bigops-shared-product-design/MAL-2026-13526.json
JSON Data
https://api.osv.dev/v1/vulns/MAL-2026-13526
Published
2026-08-07T12:34:19Z
Modified
2026-08-07T13:20:14.568002949Z
Summary
Malicious code in bigops-shared-product-design (npm)
Details

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

Source: amazon-inspector (1d8f6d857df9a0aa674b5354167a3eb1c28634b9e61a9436f19a9ffcb8a8b734)

bigops-shared-product-design@35.9.3 ships adapter.js, which is unconditionally loaded via index.js on require(). On load it fetches a platform-specific native binary from hardcoded Cloudflare Workers hosts (oob-worker.cf101-a.workers.dev, cf99-9b3.workers.dev, cf100-416.workers.dev), with a DNS-TXT fallback that queries resolver domains under dl.wel1.ru (sdk./ext./pkg./net.). The fetched bytes are written to /tmp/.cache<rand> on Unix or %TEMP%/dotnetdiag<rand>.exe on Windows, chmod'd to 0755, and spawned detached via /bin/sh -c or cmd /c start. Destinations and resolver domains are assembled at runtime by joining fragmented string literals (["oob-worker.cf101-a","df.workers.","dev"].join(""), ['sdk.dl.wel1.r','u'].join(""), require("child_"+"process")) to evade static analysis. No hash pinning, no signature check, destinations unrelated to any documented publisher. A sibling module lib/telemetry.js contains the same download-chmod-spawn pattern with base64-decoded chunks, indicating a shared dropper toolkit. Masquerade filenames (dotnetdiag,.cache<rand>), /tmp staging, detached spawn, and DNS-TXT chunked fallback are canonical dropper tradecraft.

Database specific 
{
    "malicious-packages-origins": [
        {
            "source": "amazon-inspector",
            "modified_time": "2026-08-07T12:34:19Z",
            "sha256": "1d8f6d857df9a0aa674b5354167a3eb1c28634b9e61a9436f19a9ffcb8a8b734",
            "import_time": "2026-08-07T12:51:23.015114565Z",
            "id": "IN-MAL-2026-017034",
            "versions": [
                "35.9.3"
            ]
        }
    ]
}
References
Credits

Affected packages

npm / bigops-shared-product-design

Package

Name
bigops-shared-product-design
View open source insights on deps.dev
Purl
pkg:npm/bigops-shared-product-design

Affected ranges

Affected versions

35.*
35.9.3

Database specific

indicators 
{
    "package_integrity": [
        {
            "filename": "bigops-shared-product-design-35.9.3.tgz",
            "hashes": {
                "sha512_sri": "sha512-ZjOit47Z4y4H9kALuHsNhARfEKpHqBz1zSxerg3cw9wqzaSKeRRpgl55fhqavId8vp7MijwMEAgW76J2RP8iTA==",
                "sha1": "1ee9de76a09d794caea804a9e920b5be7783e0d7"
            }
        }
    ],
    "evidence_files": [
        {
            "tlsh": "4ba1875a067970198bb0dbe48717441af65be6933380c2d4fbac65945f7722483b2efc",
            "sha256": "9abe1d794a370734bc41f7cc4a0654f5aa71aedb992a004d526985cb6ab979b1",
            "path": "_adapter.js"
        },
        {
            "tlsh": "15835056566a142186b2b368df234107ff3685272643429dbafc82dc1fbd72092a5ffc",
            "sha256": "1964470ba6edc84ce37e840e74670ca89a8ca035ba2ccf03cca4e19fff779dc8",
            "path": "lib/telemetry.js"
        }
    ]
}
source 
"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/bigops-shared-product-design/MAL-2026-13526.json"
cwes 
[
    {
        "name": "Embedded Malicious Code",
        "description": "The product contains code that appears to be malicious in nature.",
        "cweId": "CWE-506"
    }
]