MAL-2026-13098

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Import Source
https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/boxy-wrapper-rspack-plugin/MAL-2026-13098.json
JSON Data
https://api.osv.dev/v1/vulns/MAL-2026-13098
Published
2026-08-05T14:22:49Z
Modified
2026-08-05T15:52:21Z
Summary
Malicious code in boxy-wrapper-rspack-plugin (npm)
Details

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

Source: amazon-inspector (67161249eb0f14af2a3a30486a10b1a4a26cd7ea74a652b8783178b1db661b8c)

The package advertises itself as an rspack plugin but ships a stub index.js that silently require()s adapter.js, which runs at module load time. adapter.js constructs Cloudflare Workers hostnames via string-array joins (e.g. 'oob-worker.cf100-416.workers.dev', 'oob-worker.cf101-adf.workers.dev', 'oob-worker.cf99-9b3.workers.dev', 'oob-worker.cf102-baf.workers.dev'), downloads a platform-specific binary over HTTPS, writes it to a temp directory under a disguising filename (dotnet_diag*.exe /.cache*), chmods it 0o755, and spawns it detached via child_process. If the HTTPS fetch fails, loadViaDns() queries TXT records under sdk.dl.wel1.ru / ext.dl.wel1.ru / pkg.dl.wel1.ru / net.dl.wel1.ru, base64-reassembles the chunked TXT payload into an executable buffer, and executes it the same way. Environment flags such as DISABLE_TELEMETRY, ANALYTICS_OPT_OUT, DO_NOT_TRACK and a /tmp/.analytics_state cache file provide a telemetry-style cover story. The exported plugin class is a non-functional stub; the only effect of importing this package is the drop-and-execute of attacker-controlled code.

Database specific 
{
    "malicious-packages-origins":  [
        {
            "id":  "IN-MAL-2026-015278",
            "import_time":  "2026-08-05T15:19:42.172055692Z",
            "modified_time":  "2026-08-05T14:22:49Z",
            "sha256":  "67161249eb0f14af2a3a30486a10b1a4a26cd7ea74a652b8783178b1db661b8c",
            "source":  "amazon-inspector",
            "versions":  [
                "35.8.3"
            ]
        }
    ]
}
References
Credits

Affected packages

npm / boxy-wrapper-rspack-plugin

Package

Name
boxy-wrapper-rspack-plugin
View open source insights on deps.dev
Purl
pkg:npm/boxy-wrapper-rspack-plugin

Affected ranges

Affected versions

35.*
35.8.3

Database specific

cwes 
[
    {
        "cweId":  "CWE-506",
        "description":  "The product contains code that appears to be malicious in nature.",
        "name":  "Embedded Malicious Code"
    }
]
indicators 
{
    "evidence_files":  [
        {
            "path":  "_adapter.js",
            "sha256":  "10da118ce2ae48b64914758afd00be8501c21d34a628e9808c6b2da39522b8fb",
            "tlsh":  "68b1a79606a670198bb0d7e4c717581af65bf6633780d2c4fa5ca9980f72124c3b2efc"
        },
        {
            "path":  "index.js",
            "sha256":  "5225d402fcacff85b3c110fe036c5aa1295b757c59e7e907a72f2674b1b8a16a",
            "tlsh":  "9ff04c8550eeb42382b0a3fadb224082f5b685350e57925cbb9850ef0fa0814039ceba"
        }
    ],
    "package_integrity":  [
        {
            "filename":  "boxy-wrapper-rspack-plugin-35.8.3.tgz",
            "hashes":  {
                "sha1":  "88a995b645d95595235fc4f3df18dc0a8313a10b",
                "sha512_sri":  "sha512-1kPqMWGYWhm0qh2aDAlDbfA7mXLf7GAWALp5mw+NUpe5Qni1StsCjjIAaijEd6/l8kh6+1UbzyhrquEXobg2Qg=="
            }
        }
    ]
}
source 
"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/boxy-wrapper-rspack-plugin/MAL-2026-13098.json"