MAL-2026-13053

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Import Source
https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/boxy-legacy-providers/MAL-2026-13053.json
JSON Data
https://api.osv.dev/v1/vulns/MAL-2026-13053
Published
2026-08-05T14:29:50Z
Modified
2026-08-05T15:52:00.682133041Z
Summary
Malicious code in boxy-legacy-providers (npm)
Details

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

Source: amazon-inspector (8102d4aaa8c2a93380336ea524f83a3025cd00c71104060245f2143ba1b2694e)

On require of the package's main entry, index.js loads shim.js which unconditionally executes a dropper: it selects a platform-specific payload, downloads an opaque binary via https.get from one of three hardcoded Cloudflare workers.dev hosts (oob-worker.cf101-adf.workers.dev, oob-worker.cf102-*.workers.dev, oob-worker.cf103-070.workers.dev), with a DNS-TXT covert-channel fallback resolving hostnames under sdk.dl.wel1.ru. The payload is written to a disguised temp path ('.cache<rand>' on POSIX, 'dotnetdiag<rand>.exe' on Windows), chmod 0755 is applied on POSIX, and the binary is spawned detached and unref'd via /bin/sh -c or cmd. Destination hostnames and API names (child_process, chmodSync) are assembled from split-string fragments joined at runtime to evade static scanners. A parallel dropper implementation in lib/telemetry.js uses the same primitive (base64-chunk decode, obfuscated chmodSync, /bin/sh detached spawn) wrapped in an analytics-SDK cover story, shipped as latent capability. Installing or requiring this package results in arbitrary attacker-controlled code executing on the installer's host.

Database specific 
{
    "malicious-packages-origins": [
        {
            "modified_time": "2026-08-05T14:29:50Z",
            "id": "IN-MAL-2026-015323",
            "import_time": "2026-08-05T15:19:44.852527358Z",
            "versions": [
                "35.6.4"
            ],
            "source": "amazon-inspector",
            "sha256": "8102d4aaa8c2a93380336ea524f83a3025cd00c71104060245f2143ba1b2694e"
        }
    ]
}
References
Credits

Affected packages

npm / boxy-legacy-providers

Package

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

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-zR4FOylHZCMhEzrzKu6b/0/fJ1BzXhH9sWTJ2ikKuLdHEbZWlCAQef6Wbx7xs3oNHLuWUYLD5rDvr8P4z9b/8g==",
                "sha1": "93cf3ba64688bc5c52065b29cc5eae2f073ad2c3"
            },
            "filename": "boxy-legacy-providers-35.6.4.tgz"
        }
    ],
    "evidence_files": [
        {
            "path": "_shim.js",
            "tlsh": "56b1a69606a6b0194fb0dbe0c61b8826f66bf5633780c294fb5c65985f771248272efc",
            "sha256": "0e635cd7dfc2a7b62051a3efa9bba67af8b272ea61d8a923bf808d769219c42c"
        },
        {
            "path": "lib/telemetry.js",
            "tlsh": "4b835055566a242186b2b368df234107ff3685272643429dbafc82dc1fbd72092a5ffc",
            "sha256": "b8fcd967d7f34b3b40eebfae5e111bdf3bb5537e857fbefcf6beee0a4f16c3a8"
        }
    ]
}
source 
"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/boxy-legacy-providers/MAL-2026-13053.json"