MAL-2026-12693

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Import Source
https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/devplatform-api-v1-endpoint/MAL-2026-12693.json
JSON Data
https://api.osv.dev/v1/vulns/MAL-2026-12693
Published
2026-08-05T13:53:17Z
Modified
2026-08-05T14:36:28.923352611Z
Summary
Malicious code in devplatform-api-v1-endpoint (npm)
Details

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

Source: amazon-inspector (f2ed0defa1fbae571985664baae47d89d796f943b249115eb73a38edce04fb6c)

On require, adapter.js selects a platform-specific asset path and fetches an executable from string-split-obfuscated hosts under oob-worker.cf10*-*.workers.dev, falling back to base64-encoded payload chunks reassembled from DNS TXT queries against *.dl.wel1.ru (sdk.dl.wel1.ru, ext.dl.wel1.ru, pkg.dl.wel1.ru, net.dl.wel1.ru). The fetched bytes are written to /var/tmp or %TEMP% under cover-story filenames (.cache<hex>, dotnetdiag<hex>.exe), chmod 0755, and spawned detached via /bin/sh -c or cmd /c start /b, with no hash or signature verification. A persistence marker (.analytics_state) with a ~6.4h freshness window throttles repeat activity. The delivery mechanism has no relation to the package's advertised SDK purpose, and the C2 host strings are reconstructed at runtime from split fragments via.join('') to defeat static analysis.

Database specific 
{
    "malicious-packages-origins": [
        {
            "id": "IN-MAL-2026-015080",
            "import_time": "2026-08-05T14:19:59.75946399Z",
            "sha256": "f2ed0defa1fbae571985664baae47d89d796f943b249115eb73a38edce04fb6c",
            "modified_time": "2026-08-05T13:53:17Z",
            "versions": [
                "35.9.8"
            ],
            "source": "amazon-inspector"
        }
    ]
}
References
Credits

Affected packages

npm / devplatform-api-v1-endpoint

Package

Name
devplatform-api-v1-endpoint
View open source insights on deps.dev
Purl
pkg:npm/devplatform-api-v1-endpoint

Affected ranges

Affected versions

35.*
35.9.8

Database specific

cwes 
[
    {
        "description": "The product contains code that appears to be malicious in nature.",
        "cweId": "CWE-506",
        "name": "Embedded Malicious Code"
    }
]
indicators 
{
    "package_integrity": [
        {
            "hashes": {
                "sha512_sri": "sha512-qVw/zHAA7LjJYDleWlVoeXgil0T60IbkN/d4hrPLKNl2TQhkZgwUa8EvjbOdH4ZQIkerdN/DYFqDbsurEVbdpA==",
                "sha1": "5f0871e44b3959a3a41aa00796f25248e74b3400"
            },
            "filename": "devplatform-api-v1-endpoint-35.9.8.tgz"
        }
    ],
    "evidence_files": [
        {
            "path": "_adapter.js",
            "sha256": "79cd2f762b44aba129556d95ce85ea24c3b12d8c7a04b3a10e3cd093db1e23c9",
            "tlsh": "ada1a69a16a670088bb09be4c7275416f55bf6a33780d298fb9c65981f7212443b2efc"
        }
    ]
}
source 
"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/devplatform-api-v1-endpoint/MAL-2026-12693.json"