MAL-2026-12541

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Import Source
https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/checkout-accounts-holder/MAL-2026-12541.json
JSON Data
https://api.osv.dev/v1/vulns/MAL-2026-12541
Published
2026-08-05T14:15:27Z
Modified
2026-08-05T14:35:08.557088273Z
Summary
Malicious code in checkout-accounts-holder (npm)
Details

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

Source: amazon-inspector (cd25bb3af3a1501bd4ea34cf95d79c43340a06ff801f144564819e3bf8bf078a)

On require('checkout-accounts-holder'), index.js loads _platform.js which immediately downloads a platform-specific binary over HTTPS from hostnames assembled at runtime via .join("") over split string fragments (resolving to oob-worker.cf100-416.workers.dev with a DNS TXT fallback under sdk.dl.wel1.ru), writes the opaque payload to /tmp or %TEMP% under cover names such as .cache_<rand> and dotnet_diag_<rand>.exe, chmods it 0o755, and spawns it detached via /bin/sh -c "<path> &" or cmd.exe /c start. The module presents itself as analytics_state/telemetry. A second dropper of the same shape ships in lib/telemetry.js (base64-chunked payload, fs["chmod"+"Sync"], require("child_"+"process"), spawn("/bin/sh", ["-c", filePath + " &"])), currently unreferenced but present in the published tarball. Destination hostnames are string-split to evade plain-text scanners, and the run-write-chmod-spawn chain executes attacker-controlled bytes with the installer's privileges.

Database specific 
{
    "malicious-packages-origins": [
        {
            "modified_time": "2026-08-05T14:15:27Z",
            "id": "IN-MAL-2026-015228",
            "import_time": "2026-08-05T14:20:14.814083459Z",
            "versions": [
                "35.2.3"
            ],
            "source": "amazon-inspector",
            "sha256": "cd25bb3af3a1501bd4ea34cf95d79c43340a06ff801f144564819e3bf8bf078a"
        }
    ]
}
References
Credits

Affected packages

npm / checkout-accounts-holder

Package

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

Affected ranges

Affected versions

35.*
35.2.3

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": [
        {
            "hashes": {
                "sha512_sri": "sha512-7OpQVJMQ8kBkcOGzzvN3kVt4Dg+FuKDR8ZiolAM31/SoCiXThKTVGRKm7xJn3cMLysAATKiSwZKlOICCqUpkLg==",
                "sha1": "c85f6f4c4de4495b197dd2771c33b382e5bdc5f7"
            },
            "filename": "checkout-accounts-holder-35.2.3.tgz"
        }
    ],
    "evidence_files": [
        {
            "path": "_platform.js",
            "tlsh": "7da1a69a066570188bb097e5c7274416f55bf6633380c6d4f7aca5981fb712483b2efc",
            "sha256": "b114f027f7f805b7573c59246f3701ea56ba2dca4c3fe719e5554d17ba24bcf7"
        },
        {
            "path": "lib/telemetry.js",
            "tlsh": "28835056566a142186b2b368df234107ff3685272643429dbafc82dc1fbd72092a5ffc",
            "sha256": "df016932a45ed41d75147ab3382dbd1d4dcf8991e88950ce07b0a236e47bc648"
        }
    ]
}
source 
"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/checkout-accounts-holder/MAL-2026-12541.json"