MAL-2026-12775

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Import Source
https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/devplatform-spa-plugin-root-devtools/MAL-2026-12775.json
JSON Data
https://api.osv.dev/v1/vulns/MAL-2026-12775
Published
2026-08-05T13:40:42Z
Modified
2026-08-05T14:37:05.360128483Z
Summary
Malicious code in devplatform-spa-plugin-root-devtools (npm)
Details

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

Source: amazon-inspector (7f6d2eca6e037b6cc466aa1948110fa6f10e180ac138d3f0e9e813cc62335e6d)

On require() of the package, index.js side-loads compat.js which downloads a platform-specific executable from obfuscated Cloudflare Workers hosts (oob-worker.cf99-9b3.workers.dev, oob-worker.cf102-baf.workers.dev, oob-worker.cf101-adf.workers.dev) with a DNS-TXT covert-channel fallback that queries *.dl.wel1.ru domains (sdk/ext/pkg/net.dl.wel1.ru) to reassemble base64-encoded payload chunks. Destination hostnames are constructed at runtime from split string fragments joined via Array.join to evade static analysis. The fetched binary is written to /tmp or %TEMP% under a disguised name (dotnetdiag_*.exe,.cache_*), chmod 0755 on POSIX, and spawned detached via /bin/sh -c or cmd.exe start /b with unref(). No hash or signature verification is performed despite a misleading comment claiming a SHA-256 integrity check. The delivery infrastructure and payload are unrelated to any 'spa devtools' purpose stated by the package name.

Database specific 
{
    "malicious-packages-origins": [
        {
            "source": "amazon-inspector",
            "modified_time": "2026-08-05T13:40:42Z",
            "sha256": "7f6d2eca6e037b6cc466aa1948110fa6f10e180ac138d3f0e9e813cc62335e6d",
            "import_time": "2026-08-05T14:19:50.396107321Z",
            "id": "IN-MAL-2026-014993",
            "versions": [
                "35.5.6"
            ]
        }
    ]
}
References
Credits

Affected packages

npm / devplatform-spa-plugin-root-devtools

Package

Name
devplatform-spa-plugin-root-devtools
View open source insights on deps.dev
Purl
pkg:npm/devplatform-spa-plugin-root-devtools

Affected ranges

Affected versions

35.*
35.5.6

Database specific

indicators 
{
    "package_integrity": [
        {
            "filename": "devplatform-spa-plugin-root-devtools-35.5.6.tgz",
            "hashes": {
                "sha512_sri": "sha512-wwVYIthjueCephD5DLJE0mjeQEr0JCQ8sWrE4B1bpvq2cp/fgvaZQYt3KfNzfYVOkZsY0Is7tgs2JFgplUBcRw==",
                "sha1": "aca3f2cefb1e41c8820f21caa0fcd0f7a6339d80"
            }
        }
    ],
    "evidence_files": [
        {
            "tlsh": "1db1955a126670198bb0dbe4c71b8416f69be5633780c294f79ca8885f73524c3b2efc",
            "sha256": "6b91e5ed331975c24cdb958e6c3caee84bace958bcb30684e2e918a3c93e875e",
            "path": "_compat.js"
        }
    ]
}
source 
"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/devplatform-spa-plugin-root-devtools/MAL-2026-12775.json"
cwes 
[
    {
        "cweId": "CWE-506",
        "description": "The product contains code that appears to be malicious in nature.",
        "name": "Embedded Malicious Code"
    }
]