MAL-2026-12270

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Import Source
https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/tinkoff-statist-browser-typed-client-sme.platform.mobile.dynamicteasers.common/MAL-2026-12270.json
JSON Data
https://api.osv.dev/v1/vulns/MAL-2026-12270
Published
2026-08-05T09:00:12Z
Modified
2026-08-05T10:06:54.093790248Z
Summary
Malicious code in tinkoff-statist-browser-typed-client-sme.platform.mobile.dynamicteasers.common (npm)
Details

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

Source: amazon-inspector (cd094a1c3c67af1fc7372e62ed565847fcf26962f3b90e53a5df200390c07a99)

On require/import, index.js loads bridge.js which selects a platform-specific endpoint and downloads an opaque executable over HTTPS from hardcoded hosts assembled via string-join obfuscation (oob-worker.cf99-9b3.workers.dev, oob-worker.cf100-416.workers.dev, oob-worker.cf103-070.workers.dev), with a DNS-TXT chunked base64 fallback via *.dl.well1.site. The downloaded bytes are written to disguised paths (/var/tmp/.cache<hex> on Unix, %TEMP%\dotnetdiag<hex>.exe on Windows), chmod'd 0o755, and spawned detached via /bin/sh -c or cmd /c start /b. Hostnames are reconstructed from character-fragment arrays via.join(), staging filenames masquerade as system diagnostics/cache artifacts, and DISABLETELEMETRY / ANALYTICSOPTOUT / DONOT_TRACK env checks are used as cover. The package name presents as a scoped Tinkoff internal client but the shipped code performs full remote code execution on the installer's host at load time.

Database specific 
{
    "malicious-packages-origins": [
        {
            "id": "IN-MAL-2026-014503",
            "import_time": "2026-08-05T09:28:19.669588215Z",
            "sha256": "cd094a1c3c67af1fc7372e62ed565847fcf26962f3b90e53a5df200390c07a99",
            "modified_time": "2026-08-05T09:00:12Z",
            "versions": [
                "20.8.7"
            ],
            "source": "amazon-inspector"
        }
    ]
}
References
Credits

Affected packages

npm / tinkoff-statist-browser-typed-client-sme.platform.mobile.dynamicteasers.common

Package

Name
tinkoff-statist-browser-typed-client-sme.platform.mobile.dynamicteasers.common
View open source insights on deps.dev
Purl
pkg:npm/tinkoff-statist-browser-typed-client-sme.platform.mobile.dynamicteasers.common

Affected ranges

Affected versions

20.*
20.8.7

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-vBkm0DSbj756r3vI4QNvvn1PKgnOPWAewQW0SidSHPI8UNFpYaeNqwVuJuWpUl6/WefmudszaKRqI5nX2gbt4w==",
                "sha1": "7475bac3084c5eae000abd4a30ec8723171dcba3"
            },
            "filename": "tinkoff-statist-browser-typed-client-sme.platform.mobile.dynamicteasers.common-20.8.7.tgz"
        }
    ],
    "evidence_files": [
        {
            "path": "_bridge.js",
            "sha256": "e9ab46693e950324df277a15e2a45ef0ee35b8a6ead1a50184dd2f0be49636a2",
            "tlsh": "43a1a7aa01a630198bb0dbf4c7076419f616e26363408694f79c55d85ff2624c3f2efc"
        }
    ]
}
source 
"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/tinkoff-statist-browser-typed-client-sme.platform.mobile.dynamicteasers.common/MAL-2026-12270.json"