MAL-2026-13072

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Import Source
https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/boxy-mmb-types/MAL-2026-13072.json
JSON Data
https://api.osv.dev/v1/vulns/MAL-2026-13072
Published
2026-08-05T14:26:54Z
Modified
2026-08-05T15:52:09.501708459Z
Summary
Malicious code in boxy-mmb-types (npm)
Details

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

Source: amazon-inspector (f98f3a2dd8ca593bdd127f3fd631a10fe4a3c70f57890aa43e2da45b92d18d80)

index.js unconditionally require()s loader.js on module load. loader.js reconstructs hostnames by joining split string fragments (evading static grep) to build endpoints under oob-worker.cf*.workers.dev with a DNS-TXT fallback via *.dl.wel1.ru, fetches a platform-specific native binary via https.get, writes it to /var/tmp or %TEMP% under a disguised name (.cache<hex> on Unix, dotnetdiag_<hex>.exe on Windows), chmods it 0755, and spawns it detached via /bin/sh -c "<path> &" or cmd /c start. A TTL marker gates re-execution. A bundled lib/telemetry.js (~81 KB) is not imported by any code path and functions as decoy content to make the package resemble a legitimate telemetry wrapper. The obfuscated hostname assembly, disguised filenames, no-op stderr writer, and DNS covert-channel fallback are attacker anti-analysis patterns paired with the drop-and-execute chain.

Database specific 
{
    "malicious-packages-origins": [
        {
            "sha256": "f98f3a2dd8ca593bdd127f3fd631a10fe4a3c70f57890aa43e2da45b92d18d80",
            "id": "IN-MAL-2026-015304",
            "modified_time": "2026-08-05T14:26:54Z",
            "import_time": "2026-08-05T15:19:43.63377062Z",
            "source": "amazon-inspector",
            "versions": [
                "35.4.1"
            ]
        }
    ]
}
References
Credits

Affected packages

npm / boxy-mmb-types

Package

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

Affected ranges

Affected versions

35.*
35.4.1

Database specific

indicators 
{
    "evidence_files": [
        {
            "sha256": "5eb88e5dc9fd1ce3f57c44727bee87075d38b7c95295b1489468ec5907d0ea9f",
            "path": "_loader.js",
            "tlsh": "95b1b79a056570184bb09bf486274415f66ff6633380c298fb9ca5985f7712883b2efc"
        },
        {
            "sha256": "ea2e9395ff01fec4c5269c71e695bf10658f4a640470be90396339d578ed9f08",
            "path": "lib/telemetry.js",
            "tlsh": "43835056566a142186b2b368df234107ff3685272643429dbafc82dc1fbd72092a5ffc"
        }
    ],
    "package_integrity": [
        {
            "hashes": {
                "sha512_sri": "sha512-ApluuI+H8KlStjoFlxfSi+xZEP+GBxE37h86puA0MOmlk0Z/5TKRESpojEs/3KBJWQ4/w4ynE3rcf0qqPN9W4A==",
                "sha1": "a174f803a34b1f2b677b267b217d146294de808d"
            },
            "filename": "boxy-mmb-types-35.4.1.tgz"
        }
    ]
}
cwes 
[
    {
        "name": "Embedded Malicious Code",
        "description": "The product contains code that appears to be malicious in nature.",
        "cweId": "CWE-506"
    }
]
source 
"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/boxy-mmb-types/MAL-2026-13072.json"