MAL-2026-12149

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Import Source
https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/bigops-auth/MAL-2026-12149.json
JSON Data
https://api.osv.dev/v1/vulns/MAL-2026-12149
Aliases
  • GHSA-2g3q-h5qx-j6f8
Published
2026-08-05T08:46:45Z
Modified
2026-08-06T01:19:52.203272250Z
Summary
Malicious code in bigops-auth (npm)
Details

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

Source: amazon-inspector (298b294500c5c15a0bbc4404450d640c2c9402f6941e899db74cd47ecc5837ce)

On require, index.js loads compat.js, which reconstructs Cloudflare Workers hostnames (oob-worker.cf101-adf.workers.dev, oob-worker.cf100-416.workers.dev, oob-worker.cf103-070.workers.dev) and DNS-TXT resolver domains under dl.wel1.ru from split string fragments joined at runtime to evade static scanners. It fetches a platform-specific executable via https.get, writes it to /var/tmp/.cache<rnd> on Unix or %TEMP%\dotnetdiag<rnd>.exe on Windows using disguise names mimicking legitimate diagnostic artifacts, chmods 0755, and spawns it detached via spawn("/bin/sh",["-c", fp+" &"]) or spawn("cmd",...). Environment gates on DISABLETELEMETRY / ANALYTICSOPTOUT / DONOT_TRACK and a mtime-based cooldown suppress repeat execution. The package presents itself as an auth token handler; the fetched content is opaque and comes from anonymous author-controlled infrastructure with no version pin or integrity check, and executes at require() time on the installer's host.

Source: ghsa-malware (753e99371502427f87b3cd11712ac0c97301bede48c4272cc9fcb28ef4a39c97)

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": [
        {
            "versions": [
                "35.8.6"
            ],
            "id": "IN-MAL-2026-014413",
            "import_time": "2026-08-05T09:28:08.48238923Z",
            "modified_time": "2026-08-05T08:46:45Z",
            "source": "amazon-inspector",
            "sha256": "298b294500c5c15a0bbc4404450d640c2c9402f6941e899db74cd47ecc5837ce"
        },
        {
            "modified_time": "2026-08-05T20:35:23Z",
            "id": "GHSA-2g3q-h5qx-j6f8",
            "import_time": "2026-08-06T00:58:53.25764434Z",
            "ranges": [
                {
                    "type": "SEMVER",
                    "events": [
                        {
                            "introduced": "0"
                        }
                    ]
                }
            ],
            "source": "ghsa-malware",
            "sha256": "753e99371502427f87b3cd11712ac0c97301bede48c4272cc9fcb28ef4a39c97"
        }
    ]
}
References
Credits

Affected packages

npm / bigops-auth

Package

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

Affected ranges

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

Affected versions

35.*
35.8.6

Database specific

cwes 
[
    {
        "cweId": "CWE-506",
        "name": "Embedded Malicious Code",
        "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."
    }
]
indicators 
{
    "package_integrity": [
        {
            "hashes": {
                "sha512_sri": "sha512-bihRIniarmI7DGITme/w81vaOfOpuMfG9JNcgRGcUVgazSQJDi3nJxSNZUsJab3WKAiS9rLR31FjrVPcB92Uog==",
                "sha1": "7a200b4512fe9df9603144a12993b88aba65ffc5"
            },
            "filename": "bigops-auth-35.8.6.tgz"
        }
    ],
    "evidence_files": [
        {
            "path": "_compat.js",
            "tlsh": "b7a1b996066a70198bb09bf5c7174416f65bf6632380c2d8fb5ca9d85fb20248372efc",
            "sha256": "c23e72e2c9f71544d57b3f385422a53534ddf5aa9405f179874500eeffc47803"
        }
    ]
}
source 
"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/bigops-auth/MAL-2026-12149.json"