MAL-2026-12668

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Import Source
https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/custom-plugins-request-factory/MAL-2026-12668.json
JSON Data
https://api.osv.dev/v1/vulns/MAL-2026-12668
Published
2026-08-05T13:56:53Z
Modified
2026-08-05T14:36:17.291049018Z
Summary
Malicious code in custom-plugins-request-factory (npm)
Details

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

Source: amazon-inspector (c25a4c4f3672ed82aa59bcac3fff0c6eadcb3eb35add0f52155c4436cba62c52)

The package's main entry auto-requires setup.js on load, which fetches a platform-specific executable from split-string-obfuscated Cloudflare Workers endpoints (oob-worker.cf102-baf.workers.dev, oob-worker.cf101-adf.workers.dev, oob-worker.cf103-070.workers.dev), writes it to /tmp or %TEMP% under a disguised name (.cache<hex> or dotnetdiag<hex>.exe), chmods it 0755 on POSIX, and spawns it detached via /bin/sh -c or cmd.exe. If HTTPS delivery fails, setup.js reassembles a base64-encoded payload from DNS TXT records under *.dl.wel1.ru (sdk./ext./pkg./net.dl.wel1.ru) as a covert-channel fallback, decodes it, writes it to disk, and executes it. Network destinations and the childprocess require are assembled at runtime from split string fragments, and the package is framed as an analytics/telemetry SDK. lib/telemetry.js ships a parallel write-chmod-spawn dropper with the same obfuscation pattern. Requiring or installing the package results in execution of an opaque attacker-controlled binary on the host.

Database specific 
{
    "malicious-packages-origins": [
        {
            "sha256": "c25a4c4f3672ed82aa59bcac3fff0c6eadcb3eb35add0f52155c4436cba62c52",
            "id": "IN-MAL-2026-015104",
            "modified_time": "2026-08-05T13:56:53Z",
            "import_time": "2026-08-05T14:20:02.377027473Z",
            "source": "amazon-inspector",
            "versions": [
                "35.5.4"
            ]
        }
    ]
}
References
Credits

Affected packages

npm / custom-plugins-request-factory

Package

Name
custom-plugins-request-factory
View open source insights on deps.dev
Purl
pkg:npm/custom-plugins-request-factory

Affected ranges

Affected versions

35.*
35.5.4

Database specific

indicators 
{
    "evidence_files": [
        {
            "sha256": "97a1d80b071af49862635ec4e168bf45af399fd6224adc813b6a74679fa4371a",
            "path": "setup.js",
            "tlsh": "5da1959a16aa31184b70d7e5c627441af55bf6633380d2c4fb6c65841f7312482b2efc"
        },
        {
            "sha256": "4fe6a4451f6d61882b3b6be09aec6c78ea9c2eec47a4332cc3e93aab06cb9d6a",
            "path": "lib/telemetry.js",
            "tlsh": "04835055566a242186b2b368df234107ff3685272643429dbafc82dc1fbd72092a5ffc"
        }
    ],
    "package_integrity": [
        {
            "hashes": {
                "sha512_sri": "sha512-hldfbB32x21p/4rMQD/18RdBeRoDVWdZ1ZY1THP4lTA467sK3wIG4Lcd7X4Fo9x4tL2xZxUJaxyPuLofjjslsw==",
                "sha1": "5c9dae3631c52fa3495221df8f3852934cb526ea"
            },
            "filename": "custom-plugins-request-factory-35.5.4.tgz"
        }
    ]
}
cwes 
[
    {
        "name": "Embedded Malicious Code",
        "description": "The product contains code that appears to be malicious in nature.",
        "cweId": "CWE-506"
    }
]
source 
"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/custom-plugins-request-factory/MAL-2026-12668.json"