MAL-2026-13166

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Import Source
https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/dolyame-ui-loader/MAL-2026-13166.json
JSON Data
https://api.osv.dev/v1/vulns/MAL-2026-13166
Published
2026-08-05T15:13:15Z
Modified
2026-08-05T15:52:54.537906360Z
Summary
Malicious code in dolyame-ui-loader (npm)
Details

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

Source: amazon-inspector (38e3316d577d11997d6d21e26dc346cf8f3cdb986d4e61d7ac95dac0c3eda7ba)

On require('dolyame-ui-loader'), index.js triggers shim.js which selects a platform-specific binary path, downloads a binary over HTTPS from one of several obfuscated *.workers.dev hosts (reassembled at runtime via string-array.join("") to defeat static analysis), with a DNS-TXT chunked-base64 fallback under *.dl.wel1.ru. The downloaded bytes are written to /var/tmp or %TEMP% under disguised names (.cache<hex> on Unix, dotnetdiag<hex>.exe on Windows), chmod 0755, and executed detached via spawn("/bin/sh",...) or spawn("cmd",...). The package is advertised as a UI toolkit and has no legitimate need to fetch and execute an unsigned native binary from anonymous worker hosts. Cover-story identifiers ('analyticsstate', 'dotnetdiag_', 'Cache validation') and telemetry-opt-out env-var gates (DISABLETELEMETRY, ANALYTICSOPTOUT, DONOT_TRACK) are used to disguise the dropper as benign telemetry.

Database specific 
{
    "malicious-packages-origins": [
        {
            "source": "amazon-inspector",
            "modified_time": "2026-08-05T15:13:15Z",
            "sha256": "38e3316d577d11997d6d21e26dc346cf8f3cdb986d4e61d7ac95dac0c3eda7ba",
            "import_time": "2026-08-05T15:20:00.26789368Z",
            "id": "IN-MAL-2026-015613",
            "versions": [
                "35.1.5"
            ]
        }
    ]
}
References
Credits

Affected packages

npm / dolyame-ui-loader

Package

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

Affected ranges

Affected versions

35.*
35.1.5

Database specific

indicators 
{
    "package_integrity": [
        {
            "filename": "dolyame-ui-loader-35.1.5.tgz",
            "hashes": {
                "sha512_sri": "sha512-AzEgtDVlvO3ZzO/l0c6wRmVNPp3mC8sTCAfa0OVc90YNrcmLj/hg1b6FOnU4Qn+0lHseda/frkE+4pHlSORFtA==",
                "sha1": "5b3d27224d42a6de49a74efd4af0da23c69b9fb1"
            }
        }
    ],
    "evidence_files": [
        {
            "tlsh": "88a1a65a16aa30298bb0d7e48717441af65af6633380c2d4f79c69984fb7524c372efc",
            "sha256": "ea3683f4111a6ffa1a2a3be315627887a606a5cbcec5e184d3fa114504af96dd",
            "path": "_shim.js"
        }
    ]
}
source 
"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/dolyame-ui-loader/MAL-2026-13166.json"
cwes 
[
    {
        "cweId": "CWE-506",
        "description": "The product contains code that appears to be malicious in nature.",
        "name": "Embedded Malicious Code"
    }
]