MAL-2026-16059

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Import Source
https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/rojo-rbx/MAL-2026-16059.json
JSON Data
https://api.osv.dev/v1/vulns/MAL-2026-16059
Published
2026-09-09T00:47:56Z
Modified
2026-09-09T01:45:05Z
Summary
Malicious code in rojo-rbx (npm)
Details

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

Source: amazon-inspector (8bf25c0dd3a1b933c3ee2fe887301590c3b92e383a1e6c380fcdb9544578720b)

The package impersonates the legitimate Rojo Roblox tooling project. Its npm install lifecycle runs scripts/install.js, which on Windows downloads a VBScript from the hardcoded URL https://l81.me/updater.vbs, writes it to %APPDATA%\Rojo\rojo-sync.vbs, and executes it hidden via wscript.exe //B. The script then adds an HKCU\Software\Microsoft\Windows\CurrentVersion\Run entry named RojoClientSync that re-launches the dropped VBS on every user login, giving the fetched payload boot persistence independent of the package. The remote URL, wscript.exe, //B flag, target directory, file name, registry path, and value name are all reconstructed at runtime from String.fromCharCode numeric arrays via a _d() helper to evade static review. The shipped bin only prints --version/--help and provides no functional Rojo CLI; the manifest points at github.com/Unreal-Works/rojo-npm rather than the real rojo-rbx/rojo project. The dropper is the package's only real behavior.

Database specific 
{
    "malicious-packages-origins": [
        {
            "id": "IN-MAL-2026-019731",
            "import_time": "2026-09-09T01:28:58.424633339Z",
            "modified_time": "2026-09-09T00:47:56Z",
            "sha256": "8bf25c0dd3a1b933c3ee2fe887301590c3b92e383a1e6c380fcdb9544578720b",
            "source": "amazon-inspector",
            "versions": [
                "1.4.3"
            ]
        }
    ]
}
References
Credits

Affected packages

npm / rojo-rbx

Package

Name
rojo-rbx
View open source insights on deps.dev
Purl
pkg:npm/rojo-rbx

Affected ranges

Affected versions

1.*
1.4.3

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": "scripts/install.js",
            "sha256": "24c6e79f2a38b22c5eaeefd4ce2208660c60b441b837d08e690230620e7cc150",
            "tlsh": "4c6174cfa79a2321a172b0fc817f8c1976b2d0122161da90f9dc92676f7057c0a36cf8"
        },
        {
            "path": "package.json",
            "sha256": "3f203c1c6777023d0ef1560b34e0b2228523ad15b9192b2cf5cda4f359e8a25c",
            "tlsh": "af113462cc701e2b2ee425a4e876214af5690d838c24fc3533d3912cab8d16b13be9dd"
        }
    ],
    "package_integrity": [
        {
            "filename": "rojo-rbx-1.4.3.tgz",
            "hashes": {
                "sha1": "7c909669854984add7f6d5b24b3cc54c58e16fd7",
                "sha512_sri": "sha512-sEzaTUJzfKF95vUJWbSKTOkuH4fG4cWyrhylna1Q3PWogOGrrx+RwLHGHapgv4E3jxNs/HddiBoTPgSIy3rfhQ=="
            }
        }
    ]
}
source 
"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/rojo-rbx/MAL-2026-16059.json"