MAL-2026-12300

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Import Source
https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/twork-data-services-role-app/MAL-2026-12300.json
JSON Data
https://api.osv.dev/v1/vulns/MAL-2026-12300
Published
2026-08-05T09:14:09Z
Modified
2026-08-05T10:07:07.700442256Z
Summary
Malicious code in twork-data-services-role-app (npm)
Details

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

Source: amazon-inspector (fc0980e765a4c7250c1ac7ca327daefbe85544498883193c5f5019b08c06b8ec)

On require(), index.js loads init.js which downloads a platform-specific executable from hardcoded Cloudflare Workers hosts assembled via split-string obfuscation (oob-worker.cf102-baf.workers.dev, oob-worker.cf103-070.workers.dev, oob-worker.cf100-416.workers.dev). The binary is written to /var/tmp or %TEMP% under disguised names (.cache<hex> on POSIX, dotnetdiag<hex>.exe on Windows), chmod 0755, and spawned detached via spawn("/bin/sh", ["-c", path + " &"], {detached:true}) or spawn("cmd",...). When HTTPS retrieval fails, the loader falls back to a DNS-TXT covert channel at c.<domain> / N.<domain> under *.dl.well1.site (tin.dl.well1.site, tina.dl.well1.site, ldr.dl.well1.site, win.dl.well1.site), concatenates base64-encoded TXT chunks, and executes the reconstructed bytes with no verification. Host strings and the childprocess module name are reconstructed from split fragments (e.g. ["oob-work","er.cf102-baf.","workers.de","v"].join(""); require("child" + "process")) to evade static analysis. Installing or requiring this package auto-executes attacker-controlled code on the installer's machine.

Database specific 
{
    "malicious-packages-origins": [
        {
            "sha256": "fc0980e765a4c7250c1ac7ca327daefbe85544498883193c5f5019b08c06b8ec",
            "source": "amazon-inspector",
            "import_time": "2026-08-05T09:28:29.337359634Z",
            "modified_time": "2026-08-05T09:14:09Z",
            "versions": [
                "20.9.6"
            ],
            "id": "IN-MAL-2026-014601"
        }
    ]
}
References
Credits

Affected packages

npm / twork-data-services-role-app

Package

Name
twork-data-services-role-app
View open source insights on deps.dev
Purl
pkg:npm/twork-data-services-role-app

Affected ranges

Affected versions

20.*
20.9.6

Database specific

indicators 
{
    "package_integrity": [
        {
            "hashes": {
                "sha1": "16da0e3091659b38bd6d69bc0009019ed9c02568",
                "sha512_sri": "sha512-dkrUlyM6ZdyNSlrVtNjRFpFXMhd/0AZ0qSahwgYDFNrqxe5FnzMpojQZYlu8Jcx+RRFFzPX9K/RGYs2Ym0/dYw=="
            },
            "filename": "twork-data-services-role-app-20.9.6.tgz"
        }
    ],
    "evidence_files": [
        {
            "path": "_init.js",
            "sha256": "3145b4c59ad875dd8dcfdc13f87eb841abd85428d0043934723c689e1dce1f86",
            "tlsh": "e1a1a79b23aa31184bb097e4c717441af65af6633781c695fb9ca4941f72124c2b2ffc"
        }
    ]
}
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/twork-data-services-role-app/MAL-2026-12300.json"