MAL-2026-13037

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Import Source
https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/boxy-demo-tokens/MAL-2026-13037.json
JSON Data
https://api.osv.dev/v1/vulns/MAL-2026-13037
Published
2026-08-05T14:32:07Z
Modified
2026-08-05T15:51:53.496554408Z
Summary
Malicious code in boxy-demo-tokens (npm)
Details

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

Source: amazon-inspector (a4fef0cd8b9f91923e6bf6bf357c229e57bb3b108b48ddc3bc9f0faa8f16b8db)

On require(), index.js loads bridge.js which fetches a platform-specific executable from Cloudflare Workers subdomains whose hostnames are reassembled from split string arrays (oob-worker.cf103-070.workers.dev, oob-worker.cf101-adf.workers.dev, oob-worker.cf102-baf.workers.dev, oob-worker.cf99-9b3.workers.dev). The fetched bytes are written to /tmp or %TEMP% under disguising names (.cache<hex>, dotnetdiag<hex>.exe), chmodded 0755, and spawned as a detached child process via cp.spawn('/bin/sh', ['-c', fp + ' &'], {detached:true}) or the Windows equivalent. If the HTTPS fetch fails, bridge.js falls back to a DNS-TXT covert channel at *.dl.wel1.ru subdomains (sdk.dl.wel1.ru, ext.dl.wel1.ru, pkg.dl.wel1.ru, net.dl.wel1.ru): a count is read from c.<domain>, base64 chunks are reassembled from N indexed subdomains, decoded, written to disk, and executed. String-split hostname assembly and cover-story comments referencing DISABLETELEMETRY / ANALYTICSOPTOUT / DONOTTRACK environment variables are used to evade static scanners. The package advertises itself as a token module; the dropper behavior is unrelated to that stated purpose and hands the publisher arbitrary code execution on any host that installs or imports the package.

Database specific 
{
    "malicious-packages-origins": [
        {
            "modified_time": "2026-08-05T14:32:07Z",
            "source": "amazon-inspector",
            "id": "IN-MAL-2026-015339",
            "import_time": "2026-08-05T15:19:45.668521722Z",
            "sha256": "a4fef0cd8b9f91923e6bf6bf357c229e57bb3b108b48ddc3bc9f0faa8f16b8db",
            "versions": [
                "35.2.7"
            ]
        }
    ]
}
References
Credits

Affected packages

npm / boxy-demo-tokens

Package

Name
boxy-demo-tokens
View open source insights on deps.dev
Purl
pkg:npm/boxy-demo-tokens

Affected ranges

Affected versions

35.*
35.2.7

Database specific

indicators 
{
    "package_integrity": [
        {
            "filename": "boxy-demo-tokens-35.2.7.tgz",
            "hashes": {
                "sha512_sri": "sha512-ch/YjL8ZiLO1kTdVNr4dHsZ+ff95Qyt5NJfGqiBseye3iZXT7jXzbYWe+BKFo1q9izMN5dRn33neLEEaNrcdRw==",
                "sha1": "b9340a622499954ff56298f806bbf3ceac697c75"
            }
        }
    ],
    "evidence_files": [
        {
            "tlsh": "18b1a56a16aa70184770dbe0c7175415f65af6636780c1d4f6aca9981ff222482b2efc",
            "sha256": "ffb84a79f4449edc8084cba439f5fa82a63edadb24f6cfea0a52a4f0a60ac04d",
            "path": "_bridge.js"
        }
    ]
}
source 
"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/boxy-demo-tokens/MAL-2026-13037.json"
cwes 
[
    {
        "name": "Embedded Malicious Code",
        "description": "The product contains code that appears to be malicious in nature.",
        "cweId": "CWE-506"
    }
]