MAL-2026-12777

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Import Source
https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/devplatform-spa-plugin-router/MAL-2026-12777.json
JSON Data
https://api.osv.dev/v1/vulns/MAL-2026-12777
Aliases
  • GHSA-cc39-2v78-m372
Published
2026-08-05T13:41:33Z
Modified
2026-08-06T01:20:38.078931813Z
Summary
Malicious code in devplatform-spa-plugin-router (npm)
Details

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

Source: amazon-inspector (a773f8568cf461dcddc59764fbdccd1c2427e32e76de70aeeb3b205190d15d08)

On require() of the package, index.js loads./ext.js, which selects a platform-specific endpoint from a runtime-assembled list of Cloudflare Worker hostnames (oob-worker.cf99-9b3.workers.dev, oob-worker.cf100-416.workers.dev, oob-worker.cf101-adf.workers.dev, oob-worker.cf102-baf.workers.dev) with a DNS-TXT fallback under *.dl.wel1.ru. The fetched bytes are written to a randomly named file in /var/tmp or %TEMP% (disguised as.cache<hex> on Unix or dotnetdiag<hex>.exe on Windows), chmodded to 0755, and spawned detached via /bin/sh -c or cmd.exe. Destination hostnames are split into array fragments and joined at runtime (['oob-worker.cf99','-9b3.workers','.de','v'].join('')) to defeat static scans, and the surrounding identifiers ('analyticsstate', 'DISABLETELEMETRY', 'dotnetdiag') present the behavior as telemetry. The fetch is unpinned, unverified, and executed from anonymous worker hosts with no relation to the package's declared purpose (a SPA router plugin).

Source: ghsa-malware (b3f86e455b8cc322c2fa742eddaef6758e264d1c9a5f07b9511e0911ef074265)

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": [
        {
            "modified_time": "2026-08-05T13:41:33Z",
            "id": "IN-MAL-2026-014999",
            "import_time": "2026-08-05T14:19:51.017822335Z",
            "versions": [
                "35.5.3"
            ],
            "source": "amazon-inspector",
            "sha256": "a773f8568cf461dcddc59764fbdccd1c2427e32e76de70aeeb3b205190d15d08"
        },
        {
            "modified_time": "2026-08-05T15:04:13Z",
            "id": "GHSA-cc39-2v78-m372",
            "import_time": "2026-08-06T00:58:53.350947779Z",
            "ranges": [
                {
                    "type": "SEMVER",
                    "events": [
                        {
                            "introduced": "0"
                        }
                    ]
                }
            ],
            "source": "ghsa-malware",
            "sha256": "b3f86e455b8cc322c2fa742eddaef6758e264d1c9a5f07b9511e0911ef074265"
        }
    ]
}
References
Credits

Affected packages

npm / devplatform-spa-plugin-router

Package

Name
devplatform-spa-plugin-router
View open source insights on deps.dev
Purl
pkg:npm/devplatform-spa-plugin-router

Affected ranges

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

Affected versions

35.*
35.5.3

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": [
        {
            "filename": "devplatform-spa-plugin-router-35.5.3.tgz",
            "hashes": {
                "sha512_sri": "sha512-WBtcW8T1vQBE5XXDoo+MLVdND/LhFRM0aI0emR1SDDAaFmmBYaFZKkZ/BaVuAy4TRxok4ToneADVPcP/MTQpXA==",
                "sha1": "692532bd564690dc1cbe67662ed2271b6ecd5158"
            }
        }
    ],
    "evidence_files": [
        {
            "path": "_ext.js",
            "tlsh": "68a185aa116670188bb0d7e5c7175416f65af6637780c2d8fb9ca9980ff211483b2efc",
            "sha256": "1a21fdc0866b19b91e0bf1196933d150fdb75a6f20acfd3d4eebde5ed3abc3b1"
        }
    ]
}
source 
"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/devplatform-spa-plugin-router/MAL-2026-12777.json"