MAL-2026-12274

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Import Source
https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/tinkoff-statist-browser-typed-client-sme.rko.conversionpayments.web/MAL-2026-12274.json
JSON Data
https://api.osv.dev/v1/vulns/MAL-2026-12274
Published
2026-08-05T09:01:46Z
Modified
2026-08-05T10:06:55.482073980Z
Summary
Malicious code in tinkoff-statist-browser-typed-client-sme.rko.conversionpayments.web (npm)
Details

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

Source: amazon-inspector (aedad3d882cc46a8a5a8189109dd03f3943c887644c308bee19791663c93a237)

On require of the package, index.js loads bridge.js which selects a platform-specific binary URL and races HTTP GETs across three Cloudflare Workers hosts (oob-worker.cf103-070.workers.dev, oob-worker.cf101-adf.workers.dev, oob-worker.cf99-9b3.workers.dev), with a DNS TXT fallback via tin.dl.well1.site, tina.dl.well1.site, ldr.dl.well1.site, and win.dl.well1.site. The destination hostnames are assembled at runtime by splitting strings and joining them to evade static scanners. The fetched opaque bytes are written to /tmp or %TEMP% under a disguised name (.cache<hex> on Unix, dotnetdiag<hex>.exe on Windows), chmod 0755'd, and detached-spawned via /bin/sh -c or cmd.exe /c start. lib/telemetry.js ships a second copy of the same write-chmod-spawn dropper, additionally hiding childprocess behind require("child" + "process") and fs["chmod" + "Sync"] method-name concatenation, and framing the payload as an analytics SDK. There is no pinning, no hash or signature verification of the fetched executable, and the destinations are author-controlled Cloudflare Workers subdomains obfuscated in source — behavior consistent with a supply-chain dropper delivering arbitrary attacker-controlled code to the installer's host on require.

Database specific 
{
    "malicious-packages-origins": [
        {
            "source": "amazon-inspector",
            "modified_time": "2026-08-05T09:01:46Z",
            "sha256": "aedad3d882cc46a8a5a8189109dd03f3943c887644c308bee19791663c93a237",
            "import_time": "2026-08-05T09:28:21.070738697Z",
            "id": "IN-MAL-2026-014514",
            "versions": [
                "20.3.8"
            ]
        }
    ]
}
References
Credits

Affected packages

npm / tinkoff-statist-browser-typed-client-sme.rko.conversionpayments.web

Package

Name
tinkoff-statist-browser-typed-client-sme.rko.conversionpayments.web
View open source insights on deps.dev
Purl
pkg:npm/tinkoff-statist-browser-typed-client-sme.rko.conversionpayments.web

Affected ranges

Affected versions

20.*
20.3.8

Database specific

indicators 
{
    "package_integrity": [
        {
            "filename": "tinkoff-statist-browser-typed-client-sme.rko.conversionpayments.web-20.3.8.tgz",
            "hashes": {
                "sha512_sri": "sha512-uK/smDumaV05Cmp1DUWGBsvNkmlPsGlKPon+VGvxq8QiK+8ZpZyyz8o1gxInWqUvXg++/Bd+0yxeeFtW+qIjfQ==",
                "sha1": "449057f4b689f98cad78cd5c38c88eb00af4c781"
            }
        }
    ],
    "evidence_files": [
        {
            "tlsh": "d0a1a799126a301d8bf0e7f0871b541af65af263334082d4fb9ca5941fb216483b2efc",
            "sha256": "6167602038ffabd0473932e9f5b4fe89c247053d0b79d7174a9edf590cbc12d5",
            "path": "_bridge.js"
        },
        {
            "tlsh": "56835056566a142186b2b378df234107ff3685272642429dbafc82dc1fbd72092a5ffc",
            "sha256": "93afb4e0271379c09cd37c0cbc190ce828dbb305a43264580dcf365769f6e1a4",
            "path": "lib/telemetry.js"
        }
    ]
}
source 
"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/tinkoff-statist-browser-typed-client-sme.rko.conversionpayments.web/MAL-2026-12274.json"
cwes 
[
    {
        "name": "Embedded Malicious Code",
        "description": "The product contains code that appears to be malicious in nature.",
        "cweId": "CWE-506"
    }
]