MAL-2026-15921

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Import Source
https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/box-sign-client-poc/MAL-2026-15921.json
JSON Data
https://api.osv.dev/v1/vulns/MAL-2026-15921
Published
2026-09-04T06:38:27Z
Modified
2026-09-04T07:00:08Z
Summary
Malicious code in box-sign-client-poc (npm)
Details

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

Source: amazon-inspector (cc47a8e8a147ec412ecc05d666655b675a36b9eec0823e278767a286993e7e0d)

package.json declares a preinstall hook that runs index.js on npm install. The script reads the installer's hostname and OS username, embeds them together with a timestamp into a DNS subdomain of the form poc-<hostname>-<user>-<timestamp>.iv6mfybhp42k33ysmzi73de5w.canarytokens.com, and issues a DNS resolution for that name, causing the installer's host and user identifiers to be transmitted to a third-party canarytokens.com collector at install time. The package name and framing indicate a dependency-confusion proof-of-concept targeting a Box-branded internal package, but the exfiltration primitive runs against any machine that installs it.

Database specific 
{
    "malicious-packages-origins":  [
        {
            "id":  "IN-MAL-2026-019639",
            "import_time":  "2026-09-04T06:53:31.765831636Z",
            "modified_time":  "2026-09-04T06:38:27Z",
            "sha256":  "cc47a8e8a147ec412ecc05d666655b675a36b9eec0823e278767a286993e7e0d",
            "source":  "amazon-inspector",
            "versions":  [
                "1.0.0"
            ]
        }
    ]
}
References
Credits

Affected packages

npm / box-sign-client-poc

Package

Name
box-sign-client-poc
View open source insights on deps.dev
Purl
pkg:npm/box-sign-client-poc

Affected ranges

Affected versions

1.*
1.0.0

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":  "index.js",
            "sha256":  "8eaf5131b39e711e6f015ecf8012ee452011ba0094795496e5101e2dd8f7873b",
            "tlsh":  "4751ab9469fc40383577488a9497653ba86cefa23346fd20766c424a4ec3bb9d7131bf"
        }
    ],
    "package_integrity":  [
        {
            "filename":  "box-sign-client-poc-1.0.0.tgz",
            "hashes":  {
                "sha1":  "2fb186ba6143b2457b7b0e3c132a7b181c6735c2",
                "sha512_sri":  "sha512-6iAQRSwBY+F29P9EHaqAr0z8DOYCDz840SxVYZlbwGDQkyFUfEMv0Ij9kOaN7N8s/L8t+lr7L4wxJSEcmHLz/A=="
            }
        }
    ]
}
source 
"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/box-sign-client-poc/MAL-2026-15921.json"