MAL-2026-12298

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Import Source
https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/twork-data-services-proxy-invest-symbols-list/MAL-2026-12298.json
JSON Data
https://api.osv.dev/v1/vulns/MAL-2026-12298
Published
2026-08-05T09:14:01Z
Modified
2026-08-05T10:07:06.348145304Z
Summary
Malicious code in twork-data-services-proxy-invest-symbols-list (npm)
Details

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

Source: amazon-inspector (cc81e5181d9c63254883ad238b48528c69f67f901daa5876684cc7490de64356)

On require() of this package, index.js loads init.js which immediately downloads a platform-specific binary from hardcoded Cloudflare Workers endpoints (oob-worker.cf100-416.workers.dev, oob-worker.cf102-baf.workers.dev, oob-worker.cf103-070.workers.dev, oob-worker.cf99-9b3.workers.dev) with a DNS-TXT base64 fallback via *.dl.well1.site. The fetched bytes are written to a temp path under disguised names (e.g. dotnetdiag_*.exe,.cache_*), chmod 0755, and detached-spawned via /bin/sh -c or cmd.exe start /b. Hostnames are assembled at runtime from split string arrays (e.g. ['oob-worker.cf100-416.w','orkers.','dev'].join('')) to defeat static hostname scanning. Destination is not the publisher's infrastructure, the fetched payload is opaque, and the package name has no legitimate reason to fetch and run a binary at import time. Platform gating, cooldown flag files, and telemetry-styled opt-out env-var names are consistent with a dropper attempting to blend in.

Database specific 
{
    "malicious-packages-origins": [
        {
            "id": "IN-MAL-2026-014600",
            "import_time": "2026-08-05T09:28:29.24909035Z",
            "sha256": "cc81e5181d9c63254883ad238b48528c69f67f901daa5876684cc7490de64356",
            "modified_time": "2026-08-05T09:14:01Z",
            "versions": [
                "20.4.6"
            ],
            "source": "amazon-inspector"
        }
    ]
}
References
Credits

Affected packages

npm / twork-data-services-proxy-invest-symbols-list

Package

Name
twork-data-services-proxy-invest-symbols-list
View open source insights on deps.dev
Purl
pkg:npm/twork-data-services-proxy-invest-symbols-list

Affected ranges

Affected versions

20.*
20.4.6

Database specific

cwes 
[
    {
        "cweId": "CWE-506",
        "description": "The product contains code that appears to be malicious in nature.",
        "name": "Embedded Malicious Code"
    }
]
indicators 
{
    "package_integrity": [
        {
            "hashes": {
                "sha512_sri": "sha512-F5aT3NxCOmS/DNS1kVFhxq6LCvUsBWjpN5STbNHu50zEZQD6UoubEGEVEa8PopuFF5FiauzNtzJeSZTCyhLFfg==",
                "sha1": "41836e9a5a9502336eb66eb28cfea49c43531a13"
            },
            "filename": "twork-data-services-proxy-invest-symbols-list-20.4.6.tgz"
        }
    ],
    "evidence_files": [
        {
            "sha256": "caefb53ad87baf09cfeb8487ff92c50fb2dc0da75d9cd6b42c7457359655da3f",
            "path": "_init.js",
            "tlsh": "81a1a7960165601c8bb0d7e4cb1b8826fa5bf56337809384fb9ca5945fb35248372efc"
        }
    ]
}
source 
"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/twork-data-services-proxy-invest-symbols-list/MAL-2026-12298.json"