MAL-2026-12523

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Import Source
https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/cards-forms-cards-core-clone/MAL-2026-12523.json
JSON Data
https://api.osv.dev/v1/vulns/MAL-2026-12523
Published
2026-08-05T14:17:57Z
Modified
2026-08-05T14:34:55.501246121Z
Summary
Malicious code in cards-forms-cards-core-clone (npm)
Details

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

Source: amazon-inspector (9d987094f38a49c0bb9ae5329e3ff47d97489ee5af348ebc7e056e752cffc1fb)

On require(), index.js loads runtime.js which detects OS and CPU architecture, reconstructs C2 hostnames from split string fragments (oob-worker.cf100-416.workers.dev, oob-worker.cf101-adf.workers.dev, oob-worker.cf99-9b3.workers.dev), and downloads a platform-specific executable over HTTPS. If those origins are unreachable, it falls back to a DNS-TXT-based delivery channel that reassembles a base64-encoded payload from numbered subdomains under *.dl.wel1.ru. The fetched binary is written to /tmp or %TEMP% under a disguised name (e.g. dotnetdiag<rand>.exe or.cache<rand>), chmodded 0755, and spawned detached via /bin/sh -c or cmd /c start. A TTL cache file (/tmp/.analytics_state) suppresses re-detonation on subsequent installs. The package name resembles a legitimate forms/cards library but ships no matching functionality; its only import-time effect is dropper execution.

Database specific 
{
    "malicious-packages-origins": [
        {
            "id": "IN-MAL-2026-015245",
            "import_time": "2026-08-05T14:20:16.205362206Z",
            "sha256": "9d987094f38a49c0bb9ae5329e3ff47d97489ee5af348ebc7e056e752cffc1fb",
            "modified_time": "2026-08-05T14:17:57Z",
            "versions": [
                "35.3.2"
            ],
            "source": "amazon-inspector"
        }
    ]
}
References
Credits

Affected packages

npm / cards-forms-cards-core-clone

Package

Name
cards-forms-cards-core-clone
View open source insights on deps.dev
Purl
pkg:npm/cards-forms-cards-core-clone

Affected ranges

Affected versions

35.*
35.3.2

Database specific

cwes 
[
    {
        "cweId": "CWE-506",
        "description": "The product contains code that appears to be malicious in nature.",
        "name": "Embedded Malicious Code"
    }
]
indicators 
{
    "package_integrity": [
        {
            "hashes": {
                "sha512_sri": "sha512-LkKunPujvYuvQKXyzhrx59FJryAzHggGXACScYekvoUNNziUzgjwDTAsh1MLlT2lyiCUcNOsmDPM693LI08qUw==",
                "sha1": "7dcdd4ee4e30136bba54f0169ddfbb7de015cc79"
            },
            "filename": "cards-forms-cards-core-clone-35.3.2.tgz"
        }
    ],
    "evidence_files": [
        {
            "path": "_runtime.js",
            "sha256": "35703c454c3d5298b24df675ed558e057e63193b33bfb063bffacd25f942170e",
            "tlsh": "8fa1979a166671088bb0dbe4ca274416f65bf6633780c2d4f79ca5985fb31244372efc"
        }
    ]
}
source 
"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/cards-forms-cards-core-clone/MAL-2026-12523.json"