MAL-2026-16253

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Import Source
https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/laycot/MAL-2026-16253.json
JSON Data
https://api.osv.dev/v1/vulns/MAL-2026-16253
Published
2026-09-16T23:57:52Z
Modified
2026-09-18T01:15:05Z
Summary
Malicious code in laycot (npm)
Details

This package is part of a malicious npm campaign published by the laycot account. Importing the package automatically launches a detached JavaScript loader that retrieves and executes additional code from npoint.io. The retrieved payload communicates with an attacker-controlled server and implements clipboard collection, keyboard and mouse event collection, filesystem scanning, and theft of Chrome extension storage.

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

Source: amazon-inspector (888eb7470e3887d76a6ecd9ccb3c635fac2e5c9c2726550b2047f7e52d6c6062)

On import, index.js unconditionally calls initialize(), which spawns loader.js as a detached, unref'd, stdio-suppressed child process (windowsHide:true) and writes a.pid file to enforce singleton persistence. loader.js issues an HTTPS GET to https://api.npoint.io/641d37178a880b1e8b8f — a free anonymous JSON-hosting service whose content is fully mutable by whoever holds the bin's edit token — base64-decodes the code field of the JSON response, and executes it via new Function('require','__dirname','__filename','module','exports', decodedCode), granting the fetched bytes full Node privileges including require. The package's declared identity is a cover story: package.json describes laycot as 'all pro layout cat visible smooth' with education/advanced-testing keywords, the README presents it as runtime-utils/image-utils with a fake getProcessInfo API, and the fetch URL is stored in a variable named API_KEY to obscure that it is an HTTP endpoint. The shipped code has no functionality matching any of these descriptions; its sole runtime behavior is the remote-fetch-and-eval loader.

Database specific 
{
    "iocs": {
        "ips": [
            "103.170.217.184"
        ],
        "urls": [
            "https://api.npoint.io/641d37178a880b1e8b8f",
            "https://api.npoint.io/37c0a0c68bf7a94ed731",
            "http://103.170.217.184:8787"
        ]
    },
    "malicious-packages-origins": [
        {
            "id": "IN-MAL-2026-020132",
            "import_time": "2026-09-17T15:18:28.931756036Z",
            "modified_time": "2026-09-17T14:47:45Z",
            "sha256": "888eb7470e3887d76a6ecd9ccb3c635fac2e5c9c2726550b2047f7e52d6c6062",
            "source": "amazon-inspector",
            "versions": [
                "1.3.10"
            ]
        }
    ]
}
References
Credits

Affected packages

npm / laycot

Package

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

Affected ranges

Affected versions

1.*
1.3.10

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": "loader.js",
            "sha256": "98602aca3efb91d6f77d4f3d0283681f1a954821885259b70127a66eb34fa7e4",
            "tlsh": "d35143a609fb35120277b0e6b70b596a96bba113314ec994fa9cc3d44fc2421d3d32dc"
        },
        {
            "path": "index.js",
            "sha256": "68a53a63f724339e9a5231f7ef0c5b72101c98b37731ec4c78530cce625e9272",
            "tlsh": "a8f0ac5b10832723855be3969662d0c00a7a8a0c3644ba02581f52bd0f840998356f57"
        },
        {
            "path": "README.md",
            "sha256": "c467b72dfe95fca6ee1a72fc359cca6fcaba8e446687a6ca595b86a4a2c57fb9",
            "tlsh": "19f09e1eae75ba17219b134b3efb54964efec5fa1011d05c6c9e40bc9253593431e278"
        }
    ],
    "package_integrity": [
        {
            "filename": "laycot-1.3.10.tgz",
            "hashes": {
                "sha1": "35d08b4b0e988ee388701f78c4a712590b00f1f9",
                "sha512_sri": "sha512-0PZUBETXe5Wgga6kfp449KwQE4rPZU0RN/mJw6laYTWSiFv4bcmJEaqgZ7BT5Gab7tG/7cuEsgT7UazraR4ZXg=="
            }
        }
    ]
}
source 
"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/laycot/MAL-2026-16253.json"