MAL-2026-13091

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Import Source
https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/boxy-test-maker/MAL-2026-13091.json
JSON Data
https://api.osv.dev/v1/vulns/MAL-2026-13091
Published
2026-08-05T14:26:44Z
Modified
2026-08-05T15:52:18.439245512Z
Summary
Malicious code in boxy-test-maker (npm)
Details

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

Source: amazon-inspector (3a5cc17bc186bfb165d7341ea7832b66bc93cafaa6f849ccc840660735c0cfa5)

On require() of the package, index.js loads ext.js which assembles C2 hostnames from split string fragments (oob-worker.cf102-baf.workers.dev, oob-worker.cf99-9b3.workers.dev, oob-worker.cf100-416.workers.dev, with a DNS-TXT covert-channel fallback to *.dl.wel1.ru), downloads a platform-specific binary, writes it to a disguised path under /var/tmp or %TEMP% (filenames such as.cache<hex> or dotnetdiag<hex>.exe), chmods 0755, and spawns it detached via /bin/sh -c or cmd.exe. A dedup stamp file named analytics_state and opt-out-style environment variable checks are used as cover. Hostnames are reconstructed at runtime via array.join("") to evade static string matching. Requiring or installing this package executes attacker-controlled native code on the host.

Database specific 
{
    "malicious-packages-origins": [
        {
            "versions": [
                "35.8.2"
            ],
            "import_time": "2026-08-05T15:19:43.596225487Z",
            "sha256": "3a5cc17bc186bfb165d7341ea7832b66bc93cafaa6f849ccc840660735c0cfa5",
            "modified_time": "2026-08-05T14:26:44Z",
            "id": "IN-MAL-2026-015303",
            "source": "amazon-inspector"
        }
    ]
}
References
Credits

Affected packages

npm / boxy-test-maker

Package

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

Affected ranges

Affected versions

35.*
35.8.2

Database specific

cwes 
[
    {
        "description": "The product contains code that appears to be malicious in nature.",
        "cweId": "CWE-506",
        "name": "Embedded Malicious Code"
    }
]
indicators 
{
    "package_integrity": [
        {
            "hashes": {
                "sha512_sri": "sha512-LtNShX3Su6G0M0X09m95auoBB06tEMiYf4/vWmz9xd+zb8J+4QqshuDFFIiRkSbnCu/X+jsh579Vs/NHXg9sDg==",
                "sha1": "9e70a0a206b98bfb76002db8d79ca8c05ab16f8f"
            },
            "filename": "boxy-test-maker-35.8.2.tgz"
        }
    ],
    "evidence_files": [
        {
            "path": "_ext.js",
            "sha256": "238f48fcb2ec1247ba1f38c7bc229c79f07abecd3ed3e85425897011553a2af4",
            "tlsh": "16a1a6aa16aa71188bb0d7e0c61b4416f95bf6633781c285fb5ca5841f73124c3b2efc"
        }
    ]
}
source 
"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/boxy-test-maker/MAL-2026-13091.json"