MAL-2026-12629

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Import Source
https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/claims-navigate/MAL-2026-12629.json
JSON Data
https://api.osv.dev/v1/vulns/MAL-2026-12629
Published
2026-08-05T14:00:44Z
Modified
2026-08-05T14:35:57.289990197Z
Summary
Malicious code in claims-navigate (npm)
Details

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

Source: amazon-inspector (216f23cb2cf520b0a927a0e5aade04814996c6d4f058989120fd09632239dbb0)

On require() of the package, index.js loads adapter.js which downloads an opaque binary from author-controlled Cloudflare Workers subdomains (oob-worker.cf101-adf.workers.dev, oob-worker.cf100-416.workers.dev, oob-worker.cf99-9b3.workers.dev), writes it to a temp path with disguised filenames (dotnetdiag<hex>.exe,.cache<hex>) under /var/tmp or %TEMP%, chmods 0755, and spawns it detached via /bin/sh -c or cmd.exe. All destination hostnames are reconstructed at runtime by joining split-string fragment arrays (e.g. ['oob-wo','rker.','cf101-adf.wo','rkers.','dev'].join('')) to defeat static string matching. If HTTPS retrieval fails, adapter.js falls back to a DNS-TXT covert channel: it queries c.<domain> for a chunk count, batches TXT lookups against N.<domain> under sdk.dl.wel1.ru / ext.dl.wel1.ru / pkg.dl.wel1.ru / net.dl.wel1.ru (also fragment-assembled), base64-decodes the concatenated TXT records into a binary, writes it to disk, and spawns it detached. Fetched bytes are opaque with no hash or signature verification. Environment variables named DISABLETELEMETRY / ANALYTICSOPTOUT / DONOTTRACK are present as an 'analytics' cover story; the README does not disclose any binary download.

Database specific 
{
    "malicious-packages-origins": [
        {
            "sha256": "216f23cb2cf520b0a927a0e5aade04814996c6d4f058989120fd09632239dbb0",
            "id": "IN-MAL-2026-015128",
            "modified_time": "2026-08-05T14:00:44Z",
            "source": "amazon-inspector",
            "import_time": "2026-08-05T14:20:04.899305297Z",
            "versions": [
                "35.2.2"
            ]
        }
    ]
}
References
Credits

Affected packages

npm / claims-navigate

Package

Name
claims-navigate
View open source insights on deps.dev
Purl
pkg:npm/claims-navigate

Affected ranges

Affected versions

35.*
35.2.2

Database specific

indicators 
{
    "evidence_files": [
        {
            "sha256": "376ca3a8218ec82d803685042046af26e17f5157b3164619c262d18069bbbe07",
            "path": "_adapter.js",
            "tlsh": "33a1b69a16aa701987b09be0c7175429f65be76333c0d288fb5ca5940f7216483b1efc"
        }
    ],
    "package_integrity": [
        {
            "hashes": {
                "sha512_sri": "sha512-uLbPqeRpwTO1mx3hENX88FAQmwcH6OOEyhG0Lfy9m7T9OxFew/4d4sHktvADxeM2MetrmRZOWwzt6ikFwBC2Ng==",
                "sha1": "4033c8f5bceb0792eb43a439edd1b0f5df0bf3ba"
            },
            "filename": "claims-navigate-35.2.2.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/claims-navigate/MAL-2026-12629.json"