MAL-2026-12571

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Import Source
https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/checkout-mobile-accounts-old/MAL-2026-12571.json
JSON Data
https://api.osv.dev/v1/vulns/MAL-2026-12571
Published
2026-08-05T14:10:29Z
Modified
2026-08-05T14:35:29.259279226Z
Summary
Malicious code in checkout-mobile-accounts-old (npm)
Details

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

Source: amazon-inspector (67f6eeca2bb17729fe666aaaf6849e26c474a130f5a17ca7dfe6c4c6c6ae4e8a)

On require() of checkout-mobile-accounts-old, index.js loads support.js which downloads a platform-specific native binary from hardcoded Cloudflare Workers hosts (oob-worker.cf103-070.workers.dev, oob-worker.cf99-9b3.workers.dev, oob-worker.cf100-416.workers.dev) with a DNS-TXT covert-channel fallback under wel1.ru (sdk./ext./pkg./net.dl.wel1.ru), stages the payload under /var/tmp or %TEMP% with disguised filenames (dotnetdiag_*.exe,.cache_*), chmods 0755 on POSIX, and spawns it detached via /bin/sh -c or cmd. The C2 hostnames are assembled at runtime by joining split string literals, and the DNS fallback reassembles a base64-encoded binary from numbered TXT records (c.<domain> for chunk count, 0..n.<domain> for chunks). Environment variables DISABLETELEMETRY, ANALYTICSOPTOUT, and DONOT_TRACK, plus a cooldown flag file, are checked to suppress the fetch. The delivery, obfuscation, disguised staging path, detached execution, and DNS-TXT fallback channel are all unrelated to the package's stated device-integration purpose and constitute full-host remote code execution against any installer that requires the package.

Database specific 
{
    "malicious-packages-origins": [
        {
            "sha256": "67f6eeca2bb17729fe666aaaf6849e26c474a130f5a17ca7dfe6c4c6c6ae4e8a",
            "id": "IN-MAL-2026-015194",
            "modified_time": "2026-08-05T14:10:29Z",
            "source": "amazon-inspector",
            "import_time": "2026-08-05T14:20:11.710390653Z",
            "versions": [
                "35.6.6"
            ]
        }
    ]
}
References
Credits

Affected packages

npm / checkout-mobile-accounts-old

Package

Name
checkout-mobile-accounts-old
View open source insights on deps.dev
Purl
pkg:npm/checkout-mobile-accounts-old

Affected ranges

Affected versions

35.*
35.6.6

Database specific

indicators 
{
    "evidence_files": [
        {
            "sha256": "35d5def3672af7c393a8c1cf3c3b29761bc3138889d199ce38e39efb87dd5709",
            "path": "_support.js",
            "tlsh": "0ba1a55a16a670188bb09be597175416f65bf66333c0c2c8fb5ca5981f7322483b2efc"
        }
    ],
    "package_integrity": [
        {
            "hashes": {
                "sha512_sri": "sha512-/Ts6hSnaQRDiOoxhqBvQGnpmBl9dHkBpBsYegAyYIVUuwfXAbWQjmoJh12ioY1bRZiQmQdQ5uLWlX6vQF3CiUw==",
                "sha1": "ae5e6ac38700c7bbb3dbe727e86cda5d8546db15"
            },
            "filename": "checkout-mobile-accounts-old-35.6.6.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/checkout-mobile-accounts-old/MAL-2026-12571.json"