MAL-2026-13024

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Import Source
https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/bnpl-forms-test-utils/MAL-2026-13024.json
JSON Data
https://api.osv.dev/v1/vulns/MAL-2026-13024
Published
2026-08-05T14:33:38Z
Modified
2026-08-05T15:51:47Z
Summary
Malicious code in bnpl-forms-test-utils (npm)
Details

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

Source: amazon-inspector (4cd6e149b86406225e3aca99e9bbae44cf13c0c7d5e10be27155162b63832f2f)

On require('bnpl-forms-test-utils'), index.js loads platform.js, which selects a platform-specific endpoint and downloads an opaque binary via https.get from one of three Cloudflare Workers hosts reconstructed at runtime from split-string arrays: oob-worker.cf101-adf.workers.dev, oob-worker.cf102-baf.workers.dev, and oob-worker.cf103-070.workers.dev. A DNS TXT fallback under {sdk,ext,pkg,net}.dl.wel1.ru reassembles base64 chunks when the HTTPS hosts fail. The fetched bytes are written to /var/tmp or %TEMP% under masquerading names (.cache on Unix, dotnet_diag_.exe on Windows), chmod 0755'd, and detached via spawn('/bin/sh', ['-c', path+' &'], {detached:true}) or spawn('cmd.exe', ['/c', 'start',...]). Hostnames and API names are obfuscated via array-join and string concatenation (e.g. require('child_'+'process'), fs['chmod'+'Sync']). A second dropper module lib/telemetry.js (~81 KB) shipped in the tarball implements the same fetch/chmod/spawn/detach pattern with identical obfuscation, though it is not referenced from the current main. The declared purpose is common helpers; no native source ships in the package to justify the binary download.

Database specific 
{
    "malicious-packages-origins":  [
        {
            "id":  "IN-MAL-2026-015349",
            "import_time":  "2026-08-05T15:19:46.371940486Z",
            "modified_time":  "2026-08-05T14:33:38Z",
            "sha256":  "4cd6e149b86406225e3aca99e9bbae44cf13c0c7d5e10be27155162b63832f2f",
            "source":  "amazon-inspector",
            "versions":  [
                "35.4.1"
            ]
        }
    ]
}
References
Credits

Affected packages

npm / bnpl-forms-test-utils

Package

Name
bnpl-forms-test-utils
View open source insights on deps.dev
Purl
pkg:npm/bnpl-forms-test-utils

Affected ranges

Affected versions

35.*
35.4.1

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":  "_platform.js",
            "sha256":  "44a1d5d37df9a5c7635117430554df7f304ddc0ed95aaa22b9ce294ae821e59c",
            "tlsh":  "17a1749a16a570184bb09be487175416f65bf6633781c284fb9ca5d81fb212482b2efc"
        },
        {
            "path":  "lib/telemetry.js",
            "sha256":  "17288b70bf3c827e799364622477b92b9e42f6a7fa0be538445606ad4133195f",
            "tlsh":  "d2835055566a242186b2b378df234107ff3685272642429dbafc82dc1fbd72092a5ffc"
        }
    ],
    "package_integrity":  [
        {
            "filename":  "bnpl-forms-test-utils-35.4.1.tgz",
            "hashes":  {
                "sha1":  "8c0c5ae8cf24aadfe460ff97e3187b0e4664dd45",
                "sha512_sri":  "sha512-Cj+PNZXBlLlSIXEGf3uFMQSOVQ1o3XSGh/fKy1UrMYD6D2lpCIXtkSHy50S57iQ6uboGYmiPCmZBlkyNcs36fg=="
            }
        }
    ]
}
source 
"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/bnpl-forms-test-utils/MAL-2026-13024.json"