MAL-2026-12832

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Import Source
https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/bigops-api/MAL-2026-12832.json
JSON Data
https://api.osv.dev/v1/vulns/MAL-2026-12832
Aliases
  • GHSA-fpj4-wwp3-6693
Published
2026-08-05T15:03:27Z
Modified
2026-08-06T01:19:51.930622438Z
Summary
Malicious code in bigops-api (npm)
Details

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

Source: amazon-inspector (49069c4e461f88725c6657a31565110fba41d9fa5525d9683d071614ceb6f7f6)

On require('bigops-api'), index.js loads compat.js which detects OS/arch, downloads a platform-specific binary from runtime-assembled hostnames (fragments joined at execution to form oob-worker.cf102-baf.workers.dev and sdk.dl.wel1.ru, with DNS-TXT chunked fallback), writes it to a temp path masquerading as a Microsoft diagnostic tool (Windows: dotnetdiag<hex>.exe; Unix:.cache<hex> under /var/tmp), chmods 0755, and spawns it detached via /bin/sh -c or cmd /c start /b. No signature or hash verification is performed. A secondary bundled module lib/telemetry.js (~81 KB, presented as an analytics SDK with a DISABLETELEMETRY opt-out) duplicates the same fetch-write-chmod-spawn chain, using require("child"+"process"), fs["chmod"+"Sync"], base64 chunk reassembly, and cp.spawn("/bin/sh", ["-c", filePath + " &"]). Hostnames and sensitive API names are split into fragments and reassembled at runtime to defeat static string scanning.

Source: ghsa-malware (0f38974f54013eec7b7aeed64789e4408ff9e2a18a73dd7b04fafe493d57fd89)

Any computer that has this package installed or running should be considered fully compromised. All secrets and keys stored on that computer should be rotated immediately from a different computer. The package should be removed, but as full control of the computer may have been given to an outside entity, there is no guarantee that removing the package will remove all malicious software resulting from installing it.

Database specific 
{
    "malicious-packages-origins": [
        {
            "source": "amazon-inspector",
            "import_time": "2026-08-05T15:19:57.527752624Z",
            "sha256": "49069c4e461f88725c6657a31565110fba41d9fa5525d9683d071614ceb6f7f6",
            "id": "IN-MAL-2026-015550",
            "modified_time": "2026-08-05T15:03:27Z",
            "versions": [
                "35.8.8"
            ]
        },
        {
            "ranges": [
                {
                    "events": [
                        {
                            "introduced": "0"
                        }
                    ],
                    "type": "SEMVER"
                }
            ],
            "sha256": "0f38974f54013eec7b7aeed64789e4408ff9e2a18a73dd7b04fafe493d57fd89",
            "id": "GHSA-fpj4-wwp3-6693",
            "import_time": "2026-08-06T00:58:53.366844742Z",
            "modified_time": "2026-08-05T20:10:05Z",
            "source": "ghsa-malware"
        }
    ]
}
References
Credits

Affected packages

npm / bigops-api

Package

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

Affected ranges

Type
SEMVER
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

35.*
35.8.8

Database specific

indicators 
{
    "package_integrity": [
        {
            "filename": "bigops-api-35.8.8.tgz",
            "hashes": {
                "sha512_sri": "sha512-NnHTCI0QKM5UvLY+qpOqSmTfIoHFrg8daDxRxDEPH3IMRNDxYgXBLr4xQgFnyZnE2Ixz8yQIURa0f2KkRO7QsQ==",
                "sha1": "384cbd5ba3e0c45424145d21a2f21145313682e8"
            }
        }
    ],
    "evidence_files": [
        {
            "path": "_compat.js",
            "sha256": "b4eb747d50115118a2a8aaa0ae6d5299b7c80af0feb229988aee6d30b7e168fe",
            "tlsh": "bab1b79b16a670198bb0d7e887175816f69af6633380c594fb5ca5880f73124c371efc"
        },
        {
            "tlsh": "ed835056566a142186b2b368df234107ff3685272643429dbafc82dc1fbd72092a5ffc",
            "sha256": "5797ec0bb26c686b5dd4206670d12a59035baf8b21a9ff4560d34347e10589cc",
            "path": "lib/telemetry.js"
        }
    ]
}
cwes 
[
    {
        "description": "The product contains code that appears to be malicious in nature.",
        "cweId": "CWE-506",
        "name": "Embedded Malicious Code"
    },
    {
        "description": "The product contains code that appears to be malicious in nature.",
        "name": "Embedded Malicious Code",
        "cweId": "CWE-506"
    }
]
source 
"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/bigops-api/MAL-2026-12832.json"