MAL-2026-13060

See a problem?
Import Source
https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/boxy-maker-legacy/MAL-2026-13060.json
JSON Data
https://api.osv.dev/v1/vulns/MAL-2026-13060
Published
2026-08-05T14:29:40Z
Modified
2026-08-05T15:52:03.393960139Z
Summary
Malicious code in boxy-maker-legacy (npm)
Details

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

Source: amazon-inspector (fa86d66c8cd9a63a566e94925453ec6b5d144da1adff066c7cf861ae0a02be5b)

On require of the package, runtime.js runs a bootstrap routine that downloads a platform-specific binary from obfuscated Cloudflare Workers subdomains (oob-worker.cf99-9b3.workers.dev, cf100-416, cf103-070, cf101-adf), writes it to /tmp or %TEMP% under disguised names such as dotnetdiag<hex>.exe and.cache<hex>, chmod 0755, and detach-executes it via /bin/sh -c or cmd /c start. Destination hostnames are assembled at runtime by joining fragmented string arrays (e.g. ["oob-worker",".cf99-","9b3.","work","ers.","dev"].join("")) to defeat static string matching. If HTTPS mirrors fail, the code walks DNS TXT records under *.dl.wel1.ru — first c.<domain> for a chunk count, then 0.<domain>, 1.<domain>,... — concatenating base64 fragments to reconstruct the executable payload out-of-band. The package's stated purpose is a trivial BoxyMakerLegacy class with no legitimate need for platform-specific native binaries, remote binary fetches, throwaway workers.dev hosts, disguised staging filenames, or DNS-TXT payload delivery. The behavior fires automatically on import, giving whoever published the package arbitrary code execution on the installer's machine.

Database specific 
{
    "malicious-packages-origins": [
        {
            "sha256": "fa86d66c8cd9a63a566e94925453ec6b5d144da1adff066c7cf861ae0a02be5b",
            "source": "amazon-inspector",
            "modified_time": "2026-08-05T14:29:40Z",
            "versions": [
                "35.1.7"
            ],
            "import_time": "2026-08-05T15:19:44.78141784Z",
            "id": "IN-MAL-2026-015322"
        }
    ]
}
References
Credits

Affected packages

npm / boxy-maker-legacy

Package

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

Affected ranges

Affected versions

35.*
35.1.7

Database specific

indicators 
{
    "package_integrity": [
        {
            "hashes": {
                "sha1": "a2c12d9ce25651268c43ca2b56b9e54a190d8bae",
                "sha512_sri": "sha512-eJ8Ir1zZOBi1TggAKOW5NIq4/2X80V30VYWG4yJ1y547piPIlzewzdEJzJdlod9dnSuOPR+2e4J5HF0/RwKPFA=="
            },
            "filename": "boxy-maker-legacy-35.1.7.tgz"
        }
    ],
    "evidence_files": [
        {
            "path": "_runtime.js",
            "sha256": "4bdb9175a880cc1daf9c8bd76a4654ee2307e2db745482e3b5b28fb8edcac606",
            "tlsh": "bcb1b796027a70098bb0dbe5cb175416f66af6633780c588fb5ca9941f7602483f2efc"
        }
    ]
}
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/boxy-maker-legacy/MAL-2026-13060.json"