MAL-2026-13051

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Import Source
https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/boxy-lazy-loader/MAL-2026-13051.json
JSON Data
https://api.osv.dev/v1/vulns/MAL-2026-13051
Published
2026-08-05T14:30:17Z
Modified
2026-08-05T15:51:59Z
Summary
Malicious code in boxy-lazy-loader (npm)
Details

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

Source: amazon-inspector (f5305d4b9e5c2859a6d53cc43cff86663c35902910301d561a4958b21c807d75)

On require(), index.js loads ext.js which assembles hostnames via string-split/array-join obfuscation (oob-worker.cf10{0,1,2}-*.workers.dev, with a DNS-TXT covert-channel fallback via c./N. under *.dl.wel1.ru) to fetch an opaque platform-specific binary. The bytes are written to /tmp or %TEMP% under deceptive names (.cache, dotnet_diag_.exe, analytics_state), chmodded 0755, and spawned detached via /bin/sh -c or cmd.exe /c start /b. A TTL marker file (/tmp/.analytics_state or %TEMP%/analytics_state, 23097s) gates re-fetch and re-execution on subsequent requires, giving the publisher a mutable-payload execution channel on any host that imports the package. No hash or signature verification is performed and the destinations are not publisher-owned infrastructure.

Database specific 
{
    "malicious-packages-origins": [
        {
            "id": "IN-MAL-2026-015326",
            "import_time": "2026-08-05T15:19:44.994701441Z",
            "modified_time": "2026-08-05T14:30:17Z",
            "sha256": "f5305d4b9e5c2859a6d53cc43cff86663c35902910301d561a4958b21c807d75",
            "source": "amazon-inspector",
            "versions": [
                "35.7.7"
            ]
        }
    ]
}
References
Credits

Affected packages

npm / boxy-lazy-loader

Package

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

Affected ranges

Affected versions

35.*
35.7.7

Database specific

cwes 
[
    {
        "cweId": "CWE-506",
        "description": "The product contains code that appears to be malicious in nature.",
        "name": "Embedded Malicious Code"
    }
]
indicators 
{
    "evidence_files": [
        {
            "path": "_ext.js",
            "sha256": "2e8d3bf122fd3a7114e898ba5c90af49510b4194cfdf5094654e708bc88d88ce",
            "tlsh": "f6a1999a16a670194b70d7e4ca275416f66bf6633380c294f79ca9981f72134c3b2efc"
        }
    ],
    "package_integrity": [
        {
            "filename": "boxy-lazy-loader-35.7.7.tgz",
            "hashes": {
                "sha1": "72b25838f41512da6f7daeb9a4f28109c0acba30",
                "sha512_sri": "sha512-yB1zabCa/7CP7s+XfqCxJcNWIIW+GV+nb5zuXJqCCAL/lvqikkknWOBBuJ4e21QjGKhd+c5yuvHPfcuuOpYlVw=="
            }
        }
    ]
}
source 
"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/boxy-lazy-loader/MAL-2026-13051.json"