MAL-2026-13554

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Import Source
https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/dolyame-ui-buttonstore/MAL-2026-13554.json
JSON Data
https://api.osv.dev/v1/vulns/MAL-2026-13554
Published
2026-08-07T12:27:20Z
Modified
2026-08-07T13:20:29.783963577Z
Summary
Malicious code in dolyame-ui-buttonstore (npm)
Details

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

Source: amazon-inspector (0d10bbe41547b5406844f6d8c48d4d73e8f59cf6fe0f53544c636671b76baeb8)

dolyame-ui-buttonstore@35.8.1 is a dropper. index.js unconditionally requires setup.js on load, which selects a per-platform binary path, fetches opaque bytes over HTTPS from hosts whose names are assembled at runtime by joining split character arrays (resolved destinations include oob-worker.cf102-baf.workers.dev, oob-worker.cf99-9b3.workers.dev, oob-worker.cf101-adf.workers.dev, oob-worker.cf100-416.workers.dev), writes them to a hidden file under /tmp or %TEMP% (e.g..cache<hex>, dotnetdiag_<hex>.exe), chmods 0755, and spawns the file detached via /bin/sh -c or cmd with stdio ignored. A DNS TXT-record fallback reassembles a base64 payload from subdomains under dl.wel1.ru (sdk.dl.wel1.ru, ext.dl.wel1.ru, pkg.dl.wel1.ru, net.dl.wel1.ru) when HTTPS fails. Package metadata claims 'Common TypeScript definitions' and the name mimics the 'dolyame' brand, but the tarball ships only the dropper plus a 76KB lib/telemetry.js sibling; author field is empty. The runtime-constructed destinations, hidden staging path, detached exec, and DNS-TXT fallback are intentional evasion.

Database specific 
{
    "malicious-packages-origins": [
        {
            "id": "IN-MAL-2026-016987",
            "import_time": "2026-08-07T12:51:21.062253797Z",
            "sha256": "0d10bbe41547b5406844f6d8c48d4d73e8f59cf6fe0f53544c636671b76baeb8",
            "modified_time": "2026-08-07T12:27:20Z",
            "versions": [
                "35.8.1"
            ],
            "source": "amazon-inspector"
        }
    ]
}
References
Credits

Affected packages

npm / dolyame-ui-buttonstore

Package

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

Affected ranges

Affected versions

35.*
35.8.1

Database specific

cwes 
[
    {
        "cweId": "CWE-506",
        "description": "The product contains code that appears to be malicious in nature.",
        "name": "Embedded Malicious Code"
    }
]
indicators 
{
    "package_integrity": [
        {
            "hashes": {
                "sha512_sri": "sha512-aLoDgYPWw1MOlGkuzY9xd3Va5t+DcqCOg8xBWZBniLkhLMWHZmHCNbgwkNgsjAvMV/rs5HbrbRsJ2xdYimO3jA==",
                "sha1": "5239bad98e5055e3ee65a8abfa47b4b99d937020"
            },
            "filename": "dolyame-ui-buttonstore-35.8.1.tgz"
        }
    ],
    "evidence_files": [
        {
            "path": "setup.js",
            "sha256": "54a787a4ca7667972e64d19c0dfdc7d3a57f7f58213284015d079d7d62c76723",
            "tlsh": "e7a1c65616fb30180692e1d8852f5816b19bf5933294d9c4fb4ca6949fea238c3b39fc"
        },
        {
            "path": "package.json",
            "sha256": "3b1fa0b64b7de42f5fa9e4928472e1f133ff2baa30c1b376596e0eed7f072802",
            "tlsh": "efd02e280ee3c63369c142270d2ac5467320cfab1440bc0823cf183c029e23329fe32e"
        }
    ]
}
source 
"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/dolyame-ui-buttonstore/MAL-2026-13554.json"