MAL-2026-15618

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Import Source

https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/tesgfvbncsdbcv/MAL-2026-15618.json

JSON Data

https://api.osv.dev/v1/vulns/MAL-2026-15618

Published

2026-08-26T14:55:09Z

Modified

2026-08-31T18:31:27Z

Summary

Malicious code in tesgfvbncsdbcv (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 builds a hardcoded redirect URL to https://login.microsofte.live/ (a typosquat of a Microsoft sign-in domain), appends the visitor's original query-string parameters, and navigates the browser there via window.location.replace(). 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 (f5fffcb742865a5c2de2d78ce95c8b93607ec879502ffd8e3081467b3b083fb5)

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

Database specific

{
    "malicious-packages-origins": [
        {
            "id": "IN-MAL-2026-019211",
            "import_time": "2026-08-31T18:22:24.696034785Z",
            "modified_time": "2026-08-31T17:49:18Z",
            "sha256": "f5fffcb742865a5c2de2d78ce95c8b93607ec879502ffd8e3081467b3b083fb5",
            "source": "amazon-inspector",
            "versions": [
                "1.0.0"
            ]
        }
    ]
}

References

Credits

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

Affected packages

npm / tesgfvbncsdbcv

Package

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

Affected ranges

Type: SEMVER
Events: Introduced

0 Unknown introduced version / All previous versions are affected

Affected versions

1.*

1.0.0

Database specific

cwes

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

indicators

{
    "evidence_files": [
        {
            "path": "index.html",
            "sha256": "86d5c86b1f2d474ff895b4dec356a72d254c89be20dadfa73718d26cce2fae7d",
            "tlsh": "81d2c79177d1285029038fa93b2ebbd9f928988b72c84c8ff54c7d44ef96909dad5730"
        }
    ],
    "package_integrity": [
        {
            "filename": "tesgfvbncsdbcv-1.0.0.tgz",
            "hashes": {
                "sha1": "d9b113400f6dbd0e870a8a2fcdacab28eb130528",
                "sha512_sri": "sha512-epdLgl5H4tRJ2Q5v3gxAnhE8jUyNc1gaxkZydUtxUulOAYyJmo8gwQcqqNENlwZPphJk/gOCXYkljAa5FrALPQ=="
            }
        }
    ]
}

iocs

{
    "domains": [
        "login.microsofte.live"
    ],
    "files": [
        {
            "digests": {
                "sha256": "86d5c86b1f2d474ff895b4dec356a72d254c89be20dadfa73718d26cce2fae7d"
            },
            "note": "Fake Cloudflare Turnstile page bundled as the package's main entry (from v1.0.0, the latest published version)",
            "paths": [
                "index.html"
            ],
            "source": "PACKAGE_ARCHIVE"
        }
    ]
}

source

"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/tesgfvbncsdbcv/MAL-2026-15618.json"