MAL-2026-12692

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Import Source
https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/devplatform-api-endpoint/MAL-2026-12692.json
JSON Data
https://api.osv.dev/v1/vulns/MAL-2026-12692
Published
2026-08-05T13:53:33Z
Modified
2026-08-05T14:36:27.773400638Z
Summary
Malicious code in devplatform-api-endpoint (npm)
Details

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

Source: amazon-inspector (4a79a64efe72b14455f83f667581664c2369f92f669983a58cede299f70bcadc)

On require() of the package's main entry, index.js unconditionally loads bootstrap.js, which fetches a platform-specific binary from Cloudflare Workers hosts whose names are constructed by concatenating fragmented string literals (oob-worker.cf101-adf.workers.dev, oob-worker.cf100-416.workers.dev, oob-worker.cf99-9b3.workers.dev, oob-worker.cf103-070.workers.dev). The downloaded bytes are written to a temp path with a masquerading filename (dotnetdiag_*.exe,.cache_*), chmod 0755'd, and spawned detached via child_process (/bin/sh -c or cmd.exe /c start). A DNS-TXT covert-channel fallback resolves TXT records under *.dl.wel1.ru (sdk.dl.wel1.ru, ext.dl.wel1.ru, pkg.dl.wel1.ru, net.dl.wel1.ru) enumerated as c.<domain>, 0.<domain>, 1.<domain>,... and base64-decodes the concatenated TXT payloads into an executable that is then written and run. Endpoint literals are fragmented (e.g., ["oob-worker.cf101-","ad","f.workers.d","ev"].join("")) purely to evade static matching. The package advertises no purpose that justifies fetching and executing remote binaries.

Database specific 
{
    "malicious-packages-origins": [
        {
            "id": "IN-MAL-2026-015082",
            "import_time": "2026-08-05T14:19:59.966219192Z",
            "sha256": "4a79a64efe72b14455f83f667581664c2369f92f669983a58cede299f70bcadc",
            "modified_time": "2026-08-05T13:53:33Z",
            "source": "amazon-inspector",
            "versions": [
                "35.2.9"
            ]
        }
    ]
}
References
Credits

Affected packages

npm / devplatform-api-endpoint

Package

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

Affected ranges

Affected versions

35.*
35.2.9

Database specific

cwes 
[
    {
        "description": "The product contains code that appears to be malicious in nature.",
        "name": "Embedded Malicious Code",
        "cweId": "CWE-506"
    }
]
indicators 
{
    "evidence_files": [
        {
            "path": "_bootstrap.js",
            "tlsh": "38b1a85a166b701d4bb0dbe4c6174415f66ae6933380c688fb5c69880f77128c3b2efc",
            "sha256": "532c78d06e6639458d491fa8b3b509c78608cd904e895ea81a776adfae0512eb"
        }
    ],
    "package_integrity": [
        {
            "filename": "devplatform-api-endpoint-35.2.9.tgz",
            "hashes": {
                "sha1": "a7a2d33d5a13f9f12e6f91d2768fbe51c0e0434a",
                "sha512_sri": "sha512-JawWRfAOt1Q0bKtjd1E6ZrYTEKihntH52HSDEgcYR19ASUeeFJT+fNcHH4vZK16mtTFBVzMHrLMCpSa5XhAJNg=="
            }
        }
    ]
}
source 
"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/devplatform-api-endpoint/MAL-2026-12692.json"