MAL-2026-12736

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Import Source
https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/devplatform-react-hooks/MAL-2026-12736.json
JSON Data
https://api.osv.dev/v1/vulns/MAL-2026-12736
Published
2026-08-05T13:47:00Z
Modified
2026-08-05T14:36:48.279742965Z
Summary
Malicious code in devplatform-react-hooks (npm)
Details

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

Source: amazon-inspector (7e5dd30e287186df59dd24c05aa269894c259f42c8a2a214d513e55c6510474e)

On require() of the package's main entry (index.js -> init.js), the module reconstructs a set of Cloudflare Workers hostnames from string-split fragments joined at runtime (e.g. ['oob-worker.cf99-9b3.w','orkers.de','v'].join('')), rotates through oob-worker.cf99-9b3.workers.dev, oob-worker.cf100-416.workers.dev, oob-worker.cf101-adf.workers.dev, and oob-worker.cf102-baf.workers.dev, with a DNS-TXT fallback under *.wel1.ru, downloads a platform-specific binary, writes it to a disguised path in /var/tmp or %TEMP% (.cache_<hex> on POSIX, dotnet_diag_<hex>.exe on Windows), sets mode 0755, and spawns it detached via /bin/sh -c or cmd.exe /c start /b. Cover-story comments frame the behavior as cache/telemetry and offer DISABLETELEMETRY / ANALYTICSOPTOUT / DONOTTRACK env-var opt-outs. A second module, lib/telemetry.js, contains the same drop-and-execute shape (base64 chunk decode, fs['chmod'+'Sync'] to 0755, cp.spawn('/bin/sh', ['-c', filePath+' &'])) but is not reached from the declared main. The package name and description are inconsistent with fetching and executing an opaque native binary at import time.

Database specific 
{
    "malicious-packages-origins": [
        {
            "id": "IN-MAL-2026-015037",
            "import_time": "2026-08-05T14:19:55.150805273Z",
            "sha256": "7e5dd30e287186df59dd24c05aa269894c259f42c8a2a214d513e55c6510474e",
            "modified_time": "2026-08-05T13:47:00Z",
            "versions": [
                "35.5.7"
            ],
            "source": "amazon-inspector"
        }
    ]
}
References
Credits

Affected packages

npm / devplatform-react-hooks

Package

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

Affected ranges

Affected versions

35.*
35.5.7

Database specific

cwes 
[
    {
        "cweId": "CWE-506",
        "description": "The product contains code that appears to be malicious in nature.",
        "name": "Embedded Malicious Code"
    }
]
indicators 
{
    "package_integrity": [
        {
            "hashes": {
                "sha512_sri": "sha512-qeQAOufo9i14SJD9tJ1M+0YBc64WJtbBO6aHpbYh4AfcQFq0nx2qZPMVpbWdCQnqQ3jJNoS8L3nrWL7wsaVxww==",
                "sha1": "27ba56a10bb43a527f4ee51d8595a24d9e8908a0"
            },
            "filename": "devplatform-react-hooks-35.5.7.tgz"
        }
    ],
    "evidence_files": [
        {
            "path": "_init.js",
            "sha256": "6cf7752a80b1cfd65b377c9d43483fd2bd6e13c319b1c9576a2f0c038f3c9b3f",
            "tlsh": "caa1765a16aa60088b70d7e0c7174416f65bf6633780c698f79c69885fb3124c2b2efc"
        },
        {
            "path": "lib/telemetry.js",
            "sha256": "85dbdc02d0e3e77b0f87c5ce2e37d5f5d02bec906f14bbcd82494e0e7c733806",
            "tlsh": "f3835056566a142186b2b368df234107ff3685272643429dbafc82dc1fbd72092a5ffc"
        }
    ]
}
source 
"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/devplatform-react-hooks/MAL-2026-12736.json"