MAL-2026-12691

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Import Source
https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/devplatform-api-clients/MAL-2026-12691.json
JSON Data
https://api.osv.dev/v1/vulns/MAL-2026-12691
Published
2026-08-05T13:53:00Z
Modified
2026-08-05T14:36:27.463257995Z
Summary
Malicious code in devplatform-api-clients (npm)
Details

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

Source: amazon-inspector (e548a0e6be161acd612b2729edd26e431f1bc4405e625daf957ede88db94e017)

index.js unconditionally requires./setup.js, which on module load fetches a platform-specific binary from one of three Cloudflare Workers endpoints (oob-worker.cf99-9b3.workers.dev, oob-worker.cf100-416.workers.dev, oob-worker.cf101-adf.workers.dev), with a DNS TXT-record fallback across sdk.dl.wel1.ru, ext.dl.wel1.ru, pkg.dl.wel1.ru, and net.dl.wel1.ru. The endpoints are concealed by splitting the hostnames into string arrays that are joined at runtime. The downloaded binary is written to /tmp or %TEMP% under stealth names such as dotnetdiag<rand>.exe or.cache<rand> (setup.js line ~119), chmod 0755'd, and spawned detached via spawn('/bin/sh', ['-c', fp+' &']).unref() or the cmd equivalent. A marker file gates re-execution and DISABLETELEMETRY / DONOTTRACK env vars are honored as a plausible-deniability cover. The package advertises itself as a service-client SDK; a client SDK has no need to fetch and execute an opaque native binary from a third-party edge host at require time.

Database specific 
{
    "malicious-packages-origins": [
        {
            "source": "amazon-inspector",
            "versions": [
                "35.6.8"
            ],
            "import_time": "2026-08-05T14:19:59.58162861Z",
            "sha256": "e548a0e6be161acd612b2729edd26e431f1bc4405e625daf957ede88db94e017",
            "modified_time": "2026-08-05T13:53:00Z",
            "id": "IN-MAL-2026-015078"
        }
    ]
}
References
Credits

Affected packages

npm / devplatform-api-clients

Package

Name
devplatform-api-clients
View open source insights on deps.dev
Purl
pkg:npm/devplatform-api-clients

Affected ranges

Affected versions

35.*
35.6.8

Database specific

source 
"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/devplatform-api-clients/MAL-2026-12691.json"
indicators 
{
    "package_integrity": [
        {
            "hashes": {
                "sha1": "1a4307c4981543d6ed4e470584d709c2ae640989",
                "sha512_sri": "sha512-7zS1G7hH+xCzZNggMj3gBkfi6q5L9xmVWoiHk/LBSkaBW+Cz9fsR/jDV6bWNat1UUtlZcEtsN3XOHgHsh/iO7g=="
            },
            "filename": "devplatform-api-clients-35.6.8.tgz"
        }
    ],
    "evidence_files": [
        {
            "tlsh": "2da1a89a156670188b70ebf486175815f657f6a33380c284fb5ca9985fb71248372efc",
            "sha256": "bf7ff9c520cd910e2348a413e2ac4e056f4ab0246e080adc5c1cd0828351cd60",
            "path": "setup.js"
        }
    ]
}
cwes 
[
    {
        "name": "Embedded Malicious Code",
        "description": "The product contains code that appears to be malicious in nature.",
        "cweId": "CWE-506"
    }
]