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
2026-08-05T14:36:17Z
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_ or dotnet_diag_.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 child_process 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":  [
        {
            "id":  "IN-MAL-2026-015104",
            "import_time":  "2026-08-05T14:20:02.377027473Z",
            "modified_time":  "2026-08-05T13:56:53Z",
            "sha256":  "c25a4c4f3672ed82aa59bcac3fff0c6eadcb3eb35add0f52155c4436cba62c52",
            "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

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