MAL-2026-12851

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Import Source
https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/bigops-ui-themes/MAL-2026-12851.json
JSON Data
https://api.osv.dev/v1/vulns/MAL-2026-12851
Aliases
  • GHSA-9mgc-3qcp-rwph
Published
2026-08-05T14:59:26Z
Modified
2026-08-06T01:20:03Z
Summary
Malicious code in bigops-ui-themes (npm)
Details

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

Source: amazon-inspector (f281ddf755708d180e0d2817df0e23c640fb1ab2d17441c7f35309bb37086bc1)

index.js unconditionally require()s./vendor at module load. vendor.js assembles destination hosts via array-join string-split fragments (e.g. "oob-worker." + "cf103-070.workers.de" + "v") producing oob-worker.cf103-070.workers.dev, oob-worker.cf102-baf.workers.dev, and oob-worker.cf99-9b3.workers.dev, with a DNS-TXT chunked-base64 fallback via sdk.dl.wel1.ru / ext.dl.wel1.ru / pkg.dl.wel1.ru / net.dl.wel1.ru. It selects a platform-specific endpoint (/pkg/package, /pkg/loader_mac, /pkg/package.exe), downloads the payload, writes it to /var/tmp or %TEMP% under a cover-story name (dotnet_diag.exe on Windows,.cache on Unix), fs.chmodSync(savePath, 0o755), and cp.spawn("/bin/sh", ["-c", fp+" &"]).unref() (spawn("cmd",...) on Windows). A /tmp/analytics_state marker file throttles re-execution. A sibling lib/telemetry.js frames the package as an analytics SDK and duplicates the same chmod+spawn dropper shape as dormant code; opt-out env vars (DISABLE_TELEMETRY, ANALYTICS_OPT_OUT, DO_NOT_TRACK) reinforce the cover story. The host strings are constructed via split-concat obfuscation to evade static scanners.

Source: ghsa-malware (9dbae7368d3459ac286ba0b412b46dbdc59895871cbb2dbbbf26c1842eb72d4e)

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": [
        {
            "id": "IN-MAL-2026-015524",
            "import_time": "2026-08-05T15:19:56.042303691Z",
            "modified_time": "2026-08-05T14:59:26Z",
            "sha256": "f281ddf755708d180e0d2817df0e23c640fb1ab2d17441c7f35309bb37086bc1",
            "source": "amazon-inspector",
            "versions": [
                "35.6.5"
            ]
        },
        {
            "id": "GHSA-9mgc-3qcp-rwph",
            "import_time": "2026-08-06T00:58:53.341708526Z",
            "modified_time": "2026-08-05T18:45:34Z",
            "ranges": [
                {
                    "events": [
                        {
                            "introduced": "0"
                        }
                    ],
                    "type": "SEMVER"
                }
            ],
            "sha256": "9dbae7368d3459ac286ba0b412b46dbdc59895871cbb2dbbbf26c1842eb72d4e",
            "source": "ghsa-malware"
        }
    ]
}
References
Credits

Affected packages

npm / bigops-ui-themes

Package

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

Affected ranges

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

Affected versions

35.*
35.6.5

Database specific

cwes 
[
    {
        "cweId": "CWE-506",
        "description": "The product contains code that appears to be malicious in nature.",
        "name": "Embedded Malicious Code"
    },
    {
        "cweId": "CWE-506",
        "description": "The product contains code that appears to be malicious in nature.",
        "name": "Embedded Malicious Code"
    }
]
indicators 
{
    "evidence_files": [
        {
            "path": "_vendor.js",
            "sha256": "d72d73b1d05264de2b2bee148d54bdf675a2242c9ebd5108557cef686d4c9280",
            "tlsh": "e8a1656a15a670188770ebe4c7179815f65bf66363818194fb9c69c81ff322483b2efc"
        }
    ],
    "package_integrity": [
        {
            "filename": "bigops-ui-themes-35.6.5.tgz",
            "hashes": {
                "sha1": "bf99a228e812dcb059eeb18db68577f2644c95f3",
                "sha512_sri": "sha512-i4qaOHw7UzmX8mvMtVdYllCTc8eqGWDIkYmKOLSZzTRnWtJBTEC+hxUHO7krdVm/1NGCwVwSxI411790R7vwwg=="
            }
        }
    ]
}
source 
"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/bigops-ui-themes/MAL-2026-12851.json"