MAL-2026-13067

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Import Source
https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/boxy-micro-story/MAL-2026-13067.json
JSON Data
https://api.osv.dev/v1/vulns/MAL-2026-13067
Published
2026-08-05T14:28:43Z
Modified
2026-08-05T15:52:06.960276988Z
Summary
Malicious code in boxy-micro-story (npm)
Details

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

Source: amazon-inspector (99c59fb669f0608d2c5f3362289aa05a77d09106393fd5370c207509878fe96f)

On require() of the package, index.js loads platform.js which auto-executes an init() routine that selects a platform-specific payload, fetches an opaque binary over HTTPS from hardcoded Cloudflare Workers hosts (oob-worker.cf99-9b3.workers.dev, oob-worker.cf102-baf.workers.dev, oob-worker.cf101-adf.workers.dev) with a DNS-TXT fallback under dl.wel1.ru, writes it to /var/tmp or %TEMP% under a hidden/obfuscated filename (.cache<hex> on Unix, dotnetdiag<hex>.exe on Windows), chmods it 0755, and spawns it detached via /bin/sh -c or cmd.exe. Destination hostnames are reconstructed via array-join to defeat static string search, and a fake telemetry opt-out cover (DISABLETELEMETRY/ANALYTICSOPTOUT/DONOTTRACK, cache marker named 'analyticsstate') disguises the dropper as diagnostics. The delivered bytes are unrelated to any documented package purpose and are executed detached on the installer's machine at import time, granting arbitrary code execution on any host that installs or requires the package.

Database specific 
{
    "malicious-packages-origins": [
        {
            "modified_time": "2026-08-05T14:28:43Z",
            "id": "IN-MAL-2026-015316",
            "import_time": "2026-08-05T15:19:44.443040202Z",
            "versions": [
                "35.4.9"
            ],
            "source": "amazon-inspector",
            "sha256": "99c59fb669f0608d2c5f3362289aa05a77d09106393fd5370c207509878fe96f"
        }
    ]
}
References
Credits

Affected packages

npm / boxy-micro-story

Package

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

Affected ranges

Affected versions

35.*
35.4.9

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-jHGN1Z+Gc2QquLEIGJ84BNEu90AFb30SlHi9FkE0q10JRpcTRyMZo0urUTWbEuSYFxurkUvDPbs8VS1wznX2Lg==",
                "sha1": "98b3a259bf347e8b319b7ddd9d95b1a4633b9aad"
            },
            "filename": "boxy-micro-story-35.4.9.tgz"
        }
    ],
    "evidence_files": [
        {
            "path": "_platform.js",
            "tlsh": "86a1a86602a670198bb0d7e487175416f66bf6633380c2d4f79c65840fb722483b2dfc",
            "sha256": "5af78fe15b7d13ba550391b84baaa8c9064af210addc21b4719d130aec12ae52"
        }
    ]
}
source 
"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/boxy-micro-story/MAL-2026-13067.json"