MAL-2026-12732

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Import Source
https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/devplatform-po-loader/MAL-2026-12732.json
JSON Data
https://api.osv.dev/v1/vulns/MAL-2026-12732
Published
2026-08-05T13:48:27Z
Modified
2026-08-05T14:36:46Z
Summary
Malicious code in devplatform-po-loader (npm)
Details

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

Source: amazon-inspector (185d53460e4ec6534c0b4c8f3de1c0eb2d0134eaf161d8e0211a46bca273ad69)

On require(), the package loads platform.js which selects a platform-specific path (/pkg/package, /pkg/package-arm64, /pkg/loader_mac, /pkg/package.exe), downloads a binary over HTTPS from obfuscated Cloudflare Workers endpoints (oob-worker.cf100-416.workers.dev, oob-worker.cf103-070.workers.dev, oob-worker.cf102-baf.workers.dev, oob-worker.cf99-9b3.workers.dev), writes it to /tmp or %TEMP% under disguised names (dotnet_diag.exe on Windows,.cache_ on Unix impersonating Microsoft dotnet-diag), chmods 0755, and spawns it detached via /bin/sh or cmd. Host names are reconstructed at runtime through split-string join to evade static analysis, and a fallback covert channel resolves TXT records under *.dl.wel1.ru (sdk.dl.wel1.ru, ext.dl.wel1.ru, pkg.dl.wel1.ru, net.dl.wel1.ru), reading a chunk count from c. and base64-decoding chunks from . TXT records to reassemble and execute the payload. A marker file named.analytics_state and a 'Skip in CI environments' comment further disguise intent. The package advertises itself as a trivial loader library; the shipped code contains no library functionality — only the dropper.

Database specific 
{
    "malicious-packages-origins": [
        {
            "id": "IN-MAL-2026-015047",
            "import_time": "2026-08-05T14:19:56.350524492Z",
            "modified_time": "2026-08-05T13:48:27Z",
            "sha256": "185d53460e4ec6534c0b4c8f3de1c0eb2d0134eaf161d8e0211a46bca273ad69",
            "source": "amazon-inspector",
            "versions": [
                "35.1.8"
            ]
        }
    ]
}
References
Credits

Affected packages

npm / devplatform-po-loader

Package

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

Affected ranges

Affected versions

35.*
35.1.8

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": "ded1108c032185dcd18adbc93721dbe9720a26aeea35e63e79417d92c1fbb5bc",
            "tlsh": "51a19896166660188bb0d7e4872b4416f69bf66337c0c284fb9ca5981f7712883b2dfc"
        }
    ],
    "package_integrity": [
        {
            "filename": "devplatform-po-loader-35.1.8.tgz",
            "hashes": {
                "sha1": "ea41445694c8c0f1fbd92402802db59608070c61",
                "sha512_sri": "sha512-JZvw6n/EFxeAHXZWapC+PwQYaMeeySbYAaIe9N1kHwZwCQUq6GOp/A8a/5sSdQKrULFJHhpZuu/fHOsVJIrRsA=="
            }
        }
    ]
}
source 
"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/devplatform-po-loader/MAL-2026-12732.json"