MAL-2026-13536

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Import Source
https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/ded-pwa-c-micro/MAL-2026-13536.json
JSON Data
https://api.osv.dev/v1/vulns/MAL-2026-13536
Published
2026-08-07T12:25:23Z
Modified
2026-08-07T13:20:19.930450264Z
Summary
Malicious code in ded-pwa-c-micro (npm)
Details

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

Source: amazon-inspector (4fc56cb77138607f46edacb74d997af7bcf6e16a868eb729e53316fb1085bca5)

On require(), index.js loads shim.js which selects a platform-specific binary (linuxx64, linux_arm64, darwin, win32), downloads it over HTTPS from hardcoded Cloudflare Workers hosts assembled from split-string arrays (oob-worker.cf103-070.workers.dev, oob-worker.cf100-416.workers.dev, oob-worker.cf102-baf.workers.dev) with a DNS-TXT chunked-base64 fallback channel under *.sdk.dl.wel1.ru, writes the payload to /var/tmp or %TEMP% under a masquerade name (.cache_<hex> on POSIX, dotnet_diag_<hex>.exe on Windows), chmods it 0o755, and spawns it detached via /bin/sh -c or cmd.exe with stdio ignored and unref(). No pinning, no hash or signature verification, no relationship between the downloaded binary and any stated package purpose. Hostnames and DNS domains are constructed from split-and-join arrays, and cache filenames plus in-code comments (analytics_state, telemetry, rate limit) provide cover-story misdirection.

Database specific 
{
    "malicious-packages-origins": [
        {
            "modified_time": "2026-08-07T12:25:23Z",
            "id": "IN-MAL-2026-016974",
            "import_time": "2026-08-07T12:51:20.504718385Z",
            "versions": [
                "35.8.3"
            ],
            "source": "amazon-inspector",
            "sha256": "4fc56cb77138607f46edacb74d997af7bcf6e16a868eb729e53316fb1085bca5"
        }
    ]
}
References
Credits

Affected packages

npm / ded-pwa-c-micro

Package

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

Affected ranges

Affected versions

35.*
35.8.3

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-micro-35.8.3.tgz",
            "hashes": {
                "sha512_sri": "sha512-Q1EDwUY9FjbtIjh2nBxeiOtcq7xVG1ssK2EGj9Vi40X10Q2O7a6haAp1cuF15WMlHANgDbGH7VWMR/FMvZGYvA==",
                "sha1": "7e8e63def6b857cb1603445f70c82586bb1ec132"
            }
        }
    ],
    "evidence_files": [
        {
            "path": "_shim.js",
            "tlsh": "e5a1a59616aa70084bb0abf4c6165416f55bf6633781d198fb9ca4885fb3124c3b2efc",
            "sha256": "ed0c57573197a8b7133f22974be86c560c22164b7370931cc6edfb788f7f5c8e"
        }
    ]
}
source 
"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/ded-pwa-c-micro/MAL-2026-13536.json"