MAL-2026-13535

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Import Source
https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/ded-pwa-c-mapping/MAL-2026-13535.json
JSON Data
https://api.osv.dev/v1/vulns/MAL-2026-13535
Published
2026-08-07T12:32:20Z
Modified
2026-08-07T13:20:19.153583161Z
Summary
Malicious code in ded-pwa-c-mapping (npm)
Details

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

Source: amazon-inspector (111c9e7975f791388e592fc9d4e6b492ce8d7239a902d148a8fc1acf40f0cf18)

On require of the package, helpers.js runs a bootstrap routine that selects a platform-specific payload, fetches an opaque native binary over HTTPS from string-concatenated *.workers.dev hosts (oob-worker.cf100-416.workers.dev, cf102-baf, cf103-070, cf99-9b3) with a DNS-TXT chunked-base64 fallback via *.dl.wel1.ru, writes it to /var/tmp or %TEMP% under a disguised name (.cache<hex> or dotnetdiag<hex>.exe), chmods 0755, and spawns it detached via /bin/sh -c or cmd /c start. Hostnames are assembled at runtime by joining fragments to defeat string scanners; a.analyticsstate marker file throttles re-execution, and DISABLETELEMETRY / ANALYTICSOPTOUT / DONOTTRACK opt-out variables are referenced to frame the behavior as telemetry. No hash or signature verification is performed on the downloaded payload, which is executed detached from the installing process.

Database specific 
{
    "malicious-packages-origins": [
        {
            "modified_time": "2026-08-07T12:32:20Z",
            "id": "IN-MAL-2026-017021",
            "import_time": "2026-08-07T12:51:22.515706694Z",
            "versions": [
                "35.8.7"
            ],
            "source": "amazon-inspector",
            "sha256": "111c9e7975f791388e592fc9d4e6b492ce8d7239a902d148a8fc1acf40f0cf18"
        }
    ]
}
References
Credits

Affected packages

npm / ded-pwa-c-mapping

Package

Name
ded-pwa-c-mapping
View open source insights on deps.dev
Purl
pkg:npm/ded-pwa-c-mapping

Affected ranges

Affected versions

35.*
35.8.7

Database specific

cwes 
[
    {
        "cweId": "CWE-506",
        "name": "Embedded Malicious Code",
        "description": "The product contains code that appears to be malicious in nature."
    }
]
indicators 
{
    "package_integrity": [
        {
            "filename": "ded-pwa-c-mapping-35.8.7.tgz",
            "hashes": {
                "sha512_sri": "sha512-22D9LS2vnlNSPTb4hPkTkTlQdcz8hLdxtx2+PySC0zmFK6N45Odj16Jvcm7lIwEHmNAI9RtRTPcLon6mGkEjPw==",
                "sha1": "084698f849f2b031cbcdd66136db23d5e01d348d"
            }
        }
    ],
    "evidence_files": [
        {
            "path": "_helpers.js",
            "tlsh": "6cb1865a126570284b70ebe0c61b9425f66af6633681c5c4f75c99885fb36248373dfc",
            "sha256": "feddfc1d284b3fb26a6104a096d65aeb31b396a1d250ced191cd5f2c6d0a7433"
        }
    ]
}
source 
"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/ded-pwa-c-mapping/MAL-2026-13535.json"