MAL-2026-13183

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Import Source
https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/dolyame-ui-skeleton/MAL-2026-13183.json
JSON Data
https://api.osv.dev/v1/vulns/MAL-2026-13183
Published
2026-08-05T15:09:42Z
Modified
2026-08-05T15:53:02.539060376Z
Summary
Malicious code in dolyame-ui-skeleton (npm)
Details

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

Source: amazon-inspector (340d04c991fde57848574728e622b6f4c3b1d2e7dcd061e590c4da91bbc6f12d)

Package advertises itself as a visual/UI components library but ships a load-time binary dropper. index.js unconditionally requires./vendor.js, which on require() downloads a platform-specific binary from obfuscated Cloudflare Workers hosts (oob-worker.cf101-adf.workers.dev, oob-worker.cf102-baf.workers.dev, oob-worker.cf99-9b3.workers.dev), writes it to a hidden cache path, chmods 0755, and spawns it detached via /bin/sh or cmd. Destination hostnames are reconstructed at runtime by joining string fragments (e.g. ["oob-worker.cf101-adf",".workers.dev"].join("") and ['sdk.dl.wel','1.r','u'].join("")) to evade static analysis. A fallback delivery path issues DNS TXT queries against sdk.dl.wel1.ru, ext.dl.wel1.ru, pkg.dl.wel1.ru, and net.dl.wel1.ru (c.<domain> for chunk count, then N.<domain> for base64-encoded chunks), reassembles the chunks, and executes the resulting binary — a covert channel that bypasses HTTPS egress filtering. Filenames such as analyticsstate, dotnetdiag*.exe, and.cache_* serve as cover for the dropped payload. There is no legitimate need for a UI component package to fetch and execute native binaries, obfuscate its destinations, or use DNS TXT for content delivery.

Database specific 
{
    "malicious-packages-origins": [
        {
            "sha256": "340d04c991fde57848574728e622b6f4c3b1d2e7dcd061e590c4da91bbc6f12d",
            "source": "amazon-inspector",
            "import_time": "2026-08-05T15:19:59.441594445Z",
            "modified_time": "2026-08-05T15:09:42Z",
            "versions": [
                "35.2.5"
            ],
            "id": "IN-MAL-2026-015590"
        }
    ]
}
References
Credits

Affected packages

npm / dolyame-ui-skeleton

Package

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

Affected ranges

Affected versions

35.*
35.2.5

Database specific

indicators 
{
    "package_integrity": [
        {
            "hashes": {
                "sha1": "6810d4a35697034f717c8da69492a9ede42b5ea2",
                "sha512_sri": "sha512-cL5fFhyq/VcqxuKU1pcon2ZmC3evC99veyJUOeWaaL/wXeZFo25hfB+B4uGo+Reki2hOWBV4/f4Xxc9jglQZPA=="
            },
            "filename": "dolyame-ui-skeleton-35.2.5.tgz"
        }
    ],
    "evidence_files": [
        {
            "path": "_vendor.js",
            "sha256": "cee51d8944387ccf66bc9b81df6557d911aa7b660628f2950b866f6b54eaeaa6",
            "tlsh": "65a1a79616a570188bb0d7e0c70b4816fa5bf6633780d284fb9c65945fb35248372efc"
        }
    ]
}
cwes 
[
    {
        "description": "The product contains code that appears to be malicious in nature.",
        "cweId": "CWE-506",
        "name": "Embedded Malicious Code"
    }
]
source 
"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/dolyame-ui-skeleton/MAL-2026-13183.json"