MAL-2026-13044

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Import Source
https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/boxy-fixture/MAL-2026-13044.json
JSON Data
https://api.osv.dev/v1/vulns/MAL-2026-13044
Published
2026-08-05T14:31:37Z
Modified
2026-08-05T15:51:58.264093945Z
Summary
Malicious code in boxy-fixture (npm)
Details

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

Source: amazon-inspector (bb575dd1ac71dc5968106b313680bb84dd0d90172e82c1a79887b085ba55b4bd)

On require() of the package, index.js loads support.js which executes setup() at module load. The code reconstructs Cloudflare Workers hostnames (oob-worker.cf102-baf.workers.dev, oob-worker.cf101-adf.workers.dev, oob-worker.cf99-9b3.workers.dev) from split-string arrays, downloads a platform-specific binary via https.get, writes it to /var/tmp/.cache<hex> on Unix or %TEMP%\dotnetdiag<hex>.exe on Windows, chmods it 0755, and spawns it detached via /bin/sh -c or cmd.exe /c start with unref(). A DNS-TXT covert-channel fallback reconstructs the payload from base64-encoded TXT records under sdk.dl.wel1.ru, ext.dl.wel1.ru, pkg.dl.wel1.ru, and net.dl.wel1.ru (chunk count from c.<domain>, chunks from <i>.<domain>). A second copy of the dropper primitives (base64 chunk assembly, chmodSync 0755 via string concatenation, detached /bin/sh -c spawn) is bundled in lib/telemetry.js under an 'Analytics SDK' label. Filenames masquerade as analyticsstate and dotnetdiag_*.exe.

Database specific 
{
    "malicious-packages-origins": [
        {
            "modified_time": "2026-08-05T14:31:37Z",
            "id": "IN-MAL-2026-015335",
            "import_time": "2026-08-05T15:19:45.491790555Z",
            "versions": [
                "35.6.4"
            ],
            "source": "amazon-inspector",
            "sha256": "bb575dd1ac71dc5968106b313680bb84dd0d90172e82c1a79887b085ba55b4bd"
        }
    ]
}
References
Credits

Affected packages

npm / boxy-fixture

Package

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

Affected ranges

Affected versions

35.*
35.6.4

Database specific

cwes 
[
    {
        "cweId": "CWE-506",
        "name": "Embedded Malicious Code",
        "description": "The product contains code that appears to be malicious in nature."
    }
]
indicators 
{
    "package_integrity": [
        {
            "hashes": {
                "sha512_sri": "sha512-in1QuEjx06VJnXGSpdgbM5Lb3l7otaMpN/phdaKZwNF35/8TxVH10fMPt7YnwHLGjywyxEkNszlWN3PkhC5BhQ==",
                "sha1": "3198af09eaa925499a3c3d012193303261952e04"
            },
            "filename": "boxy-fixture-35.6.4.tgz"
        }
    ],
    "evidence_files": [
        {
            "path": "_support.js",
            "tlsh": "05a1955a16a670198bb097e0c7175417f66bf6633780c6c4f69ca9940f726248372efc",
            "sha256": "69b8e1204fe3fce756545786daf8e60a00739007b734a880411a1355c67235e2"
        },
        {
            "path": "lib/telemetry.js",
            "tlsh": "1c835055566a242186b2b368df234107ff3685272643429dbafc82dc1fbd72092a5ffc",
            "sha256": "87d3d44ed7e6483aac86ad3ad13a0d3cf2badb96ff904e7e5887bd5a289ccfe7"
        }
    ]
}
source 
"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/boxy-fixture/MAL-2026-13044.json"