MAL-2026-12622

See a problem?
Import Source
https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/claims-get-percentage-value/MAL-2026-12622.json
JSON Data
https://api.osv.dev/v1/vulns/MAL-2026-12622
Published
2026-08-05T14:05:52Z
Modified
2026-08-05T14:35:54.048227002Z
Summary
Malicious code in claims-get-percentage-value (npm)
Details

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

Source: amazon-inspector (fcb53d2b24eba1d763f7d76c41b006cc7a6d236677fcc2749b310cb3389ab161)

The package's main entry (index.js) unconditionally requires platform.js, which on module load fetches a platform-specific executable from hardcoded string-concatenated hosts (oob-worker.cf103-070.workers.dev, oob-worker.cf100-416.workers.dev, oob-worker.cf99-9b3.workers.dev), with DNS-TXT fallback to sdk.dl.wel1.ru / ext.dl.wel1.ru / pkg.dl.wel1.ru / net.dl.wel1.ru. The fetched bytes are written to /tmp as a hidden dot-file (.cache<rand>) on Unix or to %TEMP% as dotnetdiag<rand>.exe on Windows, chmod 0755'd, and spawned detached via /bin/sh -c or cmd.exe start /b. Endpoint hosts and dropped file names are assembled from split string fragments; the dotnetdiag /.cache / analyticsstate names and DISABLETELEMETRY / DONOT_TRACK env-var checks form a telemetry cover story unrelated to the package's advertised purpose (a trivial percentage-value class). No hash or signature verification is performed on the downloaded binary.

Database specific 
{
    "malicious-packages-origins": [
        {
            "sha256": "fcb53d2b24eba1d763f7d76c41b006cc7a6d236677fcc2749b310cb3389ab161",
            "id": "IN-MAL-2026-015162",
            "modified_time": "2026-08-05T14:05:52Z",
            "source": "amazon-inspector",
            "import_time": "2026-08-05T14:20:08.379064566Z",
            "versions": [
                "35.4.6"
            ]
        }
    ]
}
References
Credits

Affected packages

npm / claims-get-percentage-value

Package

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

Affected ranges

Affected versions

35.*
35.4.6

Database specific

indicators 
{
    "evidence_files": [
        {
            "sha256": "9105aac4d58c8aac491211cf441c046276d05a3f148e7a35cbfd99703148d589",
            "path": "_platform.js",
            "tlsh": "7fa1976a15a970184bb0dbe4c6175415f65be5637680d2c4fb9c95881fb322483f3efc"
        }
    ],
    "package_integrity": [
        {
            "hashes": {
                "sha512_sri": "sha512-cJVfPlHwP47M0tDGkmX6QNi7QPMgItsFHrOXGFSCvxnpA398/OKroOKFXmJJgY63VL2kknsULwuFK8rVxTsOpA==",
                "sha1": "3821ce3080a753a6216393c4f5479e0ce1cd04e1"
            },
            "filename": "claims-get-percentage-value-35.4.6.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-get-percentage-value/MAL-2026-12622.json"