MAL-2026-13249

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Import Source
https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/bigops-shared-ui/MAL-2026-13249.json
JSON Data
https://api.osv.dev/v1/vulns/MAL-2026-13249
Published
2026-08-05T15:33:08Z
Modified
2026-08-05T16:50:12.386298036Z
Summary
Malicious code in bigops-shared-ui (npm)
Details

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

Source: amazon-inspector (2864e806fc8b9b1002cc51dc96a78aa9084f3d8ce133fc636ac21372c3cdfb59)

On require of bigops-shared-ui, index.js loads./setup, which downloads a native executable from obfuscated Cloudflare Workers endpoints (oob-worker.cf102-baf.workers.dev, oob-worker.cf99-9b3.workers.dev, oob-worker.cf103-070.workers.dev) with a DNS TXT-record chunked fallback channel resolving base64 payload fragments under sdk.dl.wel1.ru, ext.dl.wel1.ru, pkg.dl.wel1.ru, and net.dl.wel1.ru. Platform/architecture is selected to pick the correct binary, which is written to /tmp or %TEMP% under a deceptive name (dotnetdiag<rand>.exe or.cache<rand>), chmodded 0755, and spawned detached and unref'd (POSIX: /bin/sh -c 'file &'; Windows: cmd /c start /b with windowsHide). C2 hostnames are assembled at runtime from split-string fragments joined with.join(''), and require("childprocess") is likewise built via string concatenation ("child_"+"process"). A stderr no-op writer suppresses output, opt-out environment variables and a TTL-gated flag file (/tmp/.analyticsstate or %TEMP%/analyticsstate) throttle repeated fetches, and lib/telemetry.js contains the same child_process concatenation pattern. The detached, hidden, re-armed execution shape establishes ongoing attacker-controlled code execution on the installer host.

Database specific 
{
    "malicious-packages-origins": [
        {
            "sha256": "2864e806fc8b9b1002cc51dc96a78aa9084f3d8ce133fc636ac21372c3cdfb59",
            "source": "amazon-inspector",
            "modified_time": "2026-08-05T15:33:08Z",
            "versions": [
                "35.1.2"
            ],
            "import_time": "2026-08-05T16:13:39.134948595Z",
            "id": "IN-MAL-2026-015742"
        }
    ]
}
References
Credits

Affected packages

npm / bigops-shared-ui

Package

Name
bigops-shared-ui
View open source insights on deps.dev
Purl
pkg:npm/bigops-shared-ui

Affected ranges

Affected versions

35.*
35.1.2

Database specific

indicators 
{
    "package_integrity": [
        {
            "hashes": {
                "sha1": "277acad6d58bff5ad7105766176f8624facd20a5",
                "sha512_sri": "sha512-qwQoqyBQP2oPnn+ndwh2+HgAzGh5+ZYfgkP/0/KiDBiaDqyCM/2bSTfXNYykNcrCnZn9B+COM9rwCSFKayULsw=="
            },
            "filename": "bigops-shared-ui-35.1.2.tgz"
        }
    ],
    "evidence_files": [
        {
            "path": "setup.js",
            "sha256": "86961bf6b1e7cc812561741dd5292380b5e7cd6386f6e8f8bafea730952d5aa0",
            "tlsh": "02a1965a06a6b01d4bb0a7f0c71b4816f65bf6633681c2c4fbac55945f726248372dfc"
        }
    ]
}
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-shared-ui/MAL-2026-13249.json"