MAL-2026-13039

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Import Source
https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/boxy-devtools/MAL-2026-13039.json
JSON Data
https://api.osv.dev/v1/vulns/MAL-2026-13039
Published
2026-08-05T14:32:31Z
Modified
2026-08-05T15:51:54.834456587Z
Summary
Malicious code in boxy-devtools (npm)
Details

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

Source: amazon-inspector (44d0a7cd9dacffcb1188a7f6dfdde918d6ef5ba334e773f44330c93f4dd38ddf)

On require() of the package, index.js unconditionally loads runtime.js, which fetches an OS-specific binary from attacker-controlled hosts under oob-worker.cf1{00-03}-*.workers.dev (with a DNS TXT chunked-base64 fallback via *.dl.wel1.ru), writes it to /tmp or %TEMP% under a hidden/system-lookalike name, chmods it 0755, and spawns it detached via /bin/sh -c or cmd /c start. Destination hostnames are assembled at runtime from split string arrays (e.g. ["oob-worker.cf100-416.wor","ker","s.de","v"].join("") and ['sdk.dl.wel','1.ru'].join("")) to defeat static matching, and environment gates (DISABLETELEMETRY, DONOTTRACK, globalThis.__ANALYTICSSKIP) plus a /tmp/.analyticsstate mtime dedup stamp cloak the behavior. The exported BoxyDevtools class is a no-op stub; the sole runtime effect on import is invoking the dropper. Package name and metadata are consistent with a typosquat/impersonation shell around the payload.

Database specific 
{
    "malicious-packages-origins": [
        {
            "versions": [
                "35.9.5"
            ],
            "sha256": "44d0a7cd9dacffcb1188a7f6dfdde918d6ef5ba334e773f44330c93f4dd38ddf",
            "import_time": "2026-08-05T15:19:45.888811279Z",
            "id": "IN-MAL-2026-015342",
            "modified_time": "2026-08-05T14:32:31Z",
            "source": "amazon-inspector"
        }
    ]
}
References
Credits

Affected packages

npm / boxy-devtools

Package

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

Affected ranges

Affected versions

35.*
35.9.5

Database specific

indicators 
{
    "package_integrity": [
        {
            "filename": "boxy-devtools-35.9.5.tgz",
            "hashes": {
                "sha512_sri": "sha512-uzbN01N23frXFkd0jXXRDb0aEIpcCrVY/aG03YbiSDHbyV30VPr+Rvo5K5Z/6qS0w5cW/iR44TbpbEf/9UQr0A==",
                "sha1": "b67ce283dc67c494c9b798b130bf18b1daf65d16"
            }
        }
    ],
    "evidence_files": [
        {
            "path": "_runtime.js",
            "sha256": "0a7425950c7635936cf5d4298b16272d9b26adde07c81569e94bfb011dc6e7fe",
            "tlsh": "2eb1869a06aab0194bb0d7e4c71b8826f65bfa6337c1c284fb5c95984f721248371dfc"
        },
        {
            "tlsh": "09f0b18555dae45386b093f7df624481f552c8664a475158bd8850fe0ee441442ecf76",
            "sha256": "5807f871a484b5f308e74903273eeba85ea4bac8c3cd1f46025c1ec7f6a114c8",
            "path": "index.js"
        }
    ]
}
cwes 
[
    {
        "description": "The product contains code that appears to be malicious in nature.",
        "name": "Embedded Malicious Code",
        "cweId": "CWE-506"
    }
]
source 
"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/boxy-devtools/MAL-2026-13039.json"