MAL-2026-15610

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Import Source

https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/mn3sadkoiewu/MAL-2026-15610.json

JSON Data

https://api.osv.dev/v1/vulns/MAL-2026-15610

Published

2026-08-26T14:55:09Z

Modified

2026-08-31T18:31:24.111077551Z

Summary

Malicious code in mn3sadkoiewu (npm)

Details

Published as part of a ClickFix-style fake-CAPTCHA phishing campaign documented by OX Security (see reference). The package's only file is index.html, declared as the npm "main" entry; package.json defines no preinstall/install/postinstall/prepare lifecycle script, so the payload does not execute at npm install time. index.html renders a fake Cloudflare Turnstile verification widget. An obfuscator.io-obfuscated inline script POSTs a hardcoded per-package "hostKey" to https://api.keyval.org/get, receives a base64-encoded IV:ciphertext pair, decrypts it client-side via the Web Crypto API (AES-CTR) using an embedded key to obtain a redirect URL, appends the visitor's original query-string parameters, and navigates the browser there via window.location.replace(). This "dead drop" design lets the operator change the phishing destination for every package sharing a hostKey without republishing to npm; OX Security observed keyval.org-served destinations including a typosquatted Microsoft login page and, at time of writing, a ChatGPT redirect. The package therefore does not attack the installing machine directly; it is used as a static file host on the npm CDN (e.g. unpkg/jsDelivr) so the index.html can be linked to and opened directly in a victim's browser as a phishing/ClickFix landing page. Published by npm user "johnvaldez9a" as part of a burst of near-identical single-purpose packages published between 2026-08-04 and 2026-08-24 that share this same fake-Turnstile-redirect page structure.

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

Source: amazon-inspector (8d893b3be77d193ca343bb4812c9617f6a0942cc8f9f921668bd8adf0e037704)

The package was found to contain malicious code or consuming dependency that contains malicious code

Database specific

{
    "malicious-packages-origins": [
        {
            "import_time": "2026-08-31T18:22:27.243586161Z",
            "id": "IN-MAL-2026-019262",
            "versions": [
                "1.0.0"
            ],
            "source": "amazon-inspector",
            "modified_time": "2026-08-31T17:56:21Z",
            "sha256": "8d893b3be77d193ca343bb4812c9617f6a0942cc8f9f921668bd8adf0e037704"
        }
    ]
}

References

Credits

- Amazon Inspector - FINDER
- - inspector-research@amazon.com
- OX Security - FINDER
- - https://www.ox.security/

Affected packages

npm / mn3sadkoiewu

Package

Name: mn3sadkoiewu; View open source insights on deps.dev
Purl: pkg:npm/mn3sadkoiewu

Affected ranges

Type: SEMVER
Events: Introduced

0Unknown introduced version / All previous versions are affected

Affected versions

1.*

1.0.0

Database specific

source

"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/mn3sadkoiewu/MAL-2026-15610.json"

indicators

{
    "evidence_files": [
        {
            "path": "index.html",
            "tlsh": "b513943063c2396121435f762b1bb5dee6297dae3045488bfa0c7da5ef96a0ddec05b0",
            "sha256": "3ca9cfd48e2914b0938382a06e6f12fdcedafa8204e5927a91eea535b9803d9f"
        }
    ],
    "package_integrity": [
        {
            "filename": "mn3sadkoiewu-1.0.0.tgz",
            "hashes": {
                "sha1": "11c49c40825f1a9be81d6bc65afde484896600fd",
                "sha512_sri": "sha512-TuOxVW8bLSG5fa76wSBOXdqk2rUABrHNW0gSnkcMsWRA3nO0VNr08Aq0zSxIoM+AE1/BzHIGfpdceWsjT1uFXg=="
            }
        }
    ]
}

cwes

[
    {
        "description": "The product contains code that appears to be malicious in nature.",
        "cweId": "CWE-506",
        "name": "Embedded Malicious Code"
    }
]

iocs

{
    "domains": [
        "api.keyval.org"
    ],
    "files": [
        {
            "source": "PACKAGE_ARCHIVE",
            "paths": [
                "index.html"
            ],
            "note": "Fake Cloudflare Turnstile page bundled as the package's main entry (from v1.0.0, the latest published version)",
            "digests": {
                "sha256": "3ca9cfd48e2914b0938382a06e6f12fdcedafa8204e5927a91eea535b9803d9f"
            }
        }
    ]
}