MAL-2026-12162

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Import Source
https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/bigops-customer-processing-client/MAL-2026-12162.json
JSON Data
https://api.osv.dev/v1/vulns/MAL-2026-12162
Published
2026-08-05T08:47:06Z
Modified
2026-08-05T10:05:59.267355706Z
Summary
Malicious code in bigops-customer-processing-client (npm)
Details

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

Source: amazon-inspector (f9d2fe146d4919092aae053b82b0caacff3789c10e63358f880fa5ab4590b3d2)

On require() of this package, index.js loads support.js which unconditionally invokes setup(). setup() assembles C2 hostnames via.join('') from fragmented substrings, resolving to *.workers.dev endpoints (oob-worker.cf100-416.workers.dev, cf101-adf.workers.dev, cf102-baf.workers.dev) with a DNS-TXT fallback under sdk.dl.wel1.ru / ext.dl.wel1.ru / pkg.dl.wel1.ru / net.dl.wel1.ru. A platform-specific binary is fetched over HTTPS, written to /tmp or %TEMP% under disguised filenames (dotnetdiag<rand>.exe,.cache<rand>), chmod 0755, and detach-spawned via cmd /c start /b or /bin/sh -c. No hash or signature verification is performed despite a comment claiming a SHA-256 check. Hostname fragmentation, cover-story comments, and disguised drop paths indicate deliberate evasion.

Database specific 
{
    "malicious-packages-origins": [
        {
            "sha256": "f9d2fe146d4919092aae053b82b0caacff3789c10e63358f880fa5ab4590b3d2",
            "source": "amazon-inspector",
            "versions": [
                "35.1.8"
            ],
            "import_time": "2026-08-05T09:28:08.653318423Z",
            "modified_time": "2026-08-05T08:47:06Z",
            "id": "IN-MAL-2026-014415"
        }
    ]
}
References
Credits

Affected packages

npm / bigops-customer-processing-client

Package

Name
bigops-customer-processing-client
View open source insights on deps.dev
Purl
pkg:npm/bigops-customer-processing-client

Affected ranges

Affected versions

35.*
35.1.8

Database specific

indicators 
{
    "package_integrity": [
        {
            "hashes": {
                "sha1": "5c7803f7a00af66a5c6212ada73b02971e099298",
                "sha512_sri": "sha512-8rGkpKAvOeNtEOZel3pACQOpxszCuty1vfJL8LDFx1Ow6M6C81HPlyI0i2JGBW9kEBlne2ifX564AbEwuZuCjw=="
            },
            "filename": "bigops-customer-processing-client-35.1.8.tgz"
        }
    ],
    "evidence_files": [
        {
            "path": "_support.js",
            "sha256": "0330d1a4f95190399879962659fa764f9a81e04e9666a799444ffcd6a2b10840",
            "tlsh": "79a1969a16aa70198bb0dbf486171416f65be5533280c2c4fb9c69585f72524c373dfc"
        }
    ]
}
cwes 
[
    {
        "description": "The product contains code that appears to be malicious in nature.",
        "cweId": "CWE-506",
        "name": "Embedded Malicious Code"
    }
]
source 
"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/bigops-customer-processing-client/MAL-2026-12162.json"