MAL-2026-12269

See a problem?
Import Source
https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/tinkoff-statist-browser-typed-client-mb.reliability.android.events/MAL-2026-12269.json
JSON Data
https://api.osv.dev/v1/vulns/MAL-2026-12269
Published
2026-08-05T08:52:23Z
Modified
2026-08-05T10:06:53.194872794Z
Summary
Malicious code in tinkoff-statist-browser-typed-client-mb.reliability.android.events (npm)
Details

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

Source: amazon-inspector (10c12f5330c144cfe67198d49d442d702f5e40977e1d607ab651d33dffb2d073)

index.js unconditionally requires./loader on module load. loader.js selects a platform-specific payload path for Linux/macOS/Windows, downloads a binary over HTTPS from a rotating list of Cloudflare Workers subdomains (oob-worker.cf99-9b3.workers.dev, oob-worker.cf100-416.workers.dev, oob-worker.cf101-adf.workers.dev, oob-worker.cf102-baf.workers.dev), with a DNS-TXT chunked base64 fallback resolving via tin.dl.well1.site, tina.dl.well1.site, ldr.dl.well1.site, win.dl.well1.site. The fetched bytes are written to /tmp or %TEMP% under a disguised name (dotnetdiag<hex>.exe or.cache<hex>), chmod 0755 on POSIX, and spawned detached via cp.spawn("/bin/sh", ["-c", path + " &"]).unref(). No hash or signature verification is performed. Host destinations are reconstructed at runtime via.join("") on split string fragments to evade static analysis. A sibling module lib/telemetry.js contains identical dropper primitives with additional bracketed-property obfuscation (fs["chmod"+"Sync"], require("child"+"process")). The package name resembles an internal Tinkoff analytics client but the network destinations, payload naming, and obfuscation shape have no relation to the declared purpose.

Database specific 
{
    "malicious-packages-origins": [
        {
            "modified_time": "2026-08-05T08:52:23Z",
            "source": "amazon-inspector",
            "id": "IN-MAL-2026-014451",
            "import_time": "2026-08-05T09:28:12.487209947Z",
            "sha256": "10c12f5330c144cfe67198d49d442d702f5e40977e1d607ab651d33dffb2d073",
            "versions": [
                "20.5.4"
            ]
        }
    ]
}
References
Credits

Affected packages

npm / tinkoff-statist-browser-typed-client-mb.reliability.android.events

Package

Name
tinkoff-statist-browser-typed-client-mb.reliability.android.events
View open source insights on deps.dev
Purl
pkg:npm/tinkoff-statist-browser-typed-client-mb.reliability.android.events

Affected ranges

Affected versions

20.*
20.5.4

Database specific

indicators 
{
    "package_integrity": [
        {
            "filename": "tinkoff-statist-browser-typed-client-mb.reliability.android.events-20.5.4.tgz",
            "hashes": {
                "sha512_sri": "sha512-ItavUQcZlBMqgkYPZkQH4+L38xfAuTnGj1yipNn1sl/w11v+vV61M+r4G5y7/vjLnnLdz4Vap4eaS3tpBlGrYg==",
                "sha1": "badff1adebfe976603683e6efc032519a034b242"
            }
        }
    ],
    "evidence_files": [
        {
            "tlsh": "9ea1649a1679701d8bb0ebe4ca174415f95bf6633380c180f7aca5985fb356482b2efc",
            "sha256": "8cfe891625c6bb2a4df06e12c916dae915c921c04152be04d3ae0b7919036983",
            "path": "_loader.js"
        },
        {
            "tlsh": "e5835056566a142186b2b368df234107ff3685272643429dbafc82dc1fbd72092a5ffc",
            "sha256": "789901e4fab44b08ef2758c792828a01fb1868665ee5dab439bf1699da037f63",
            "path": "lib/telemetry.js"
        }
    ]
}
source 
"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/tinkoff-statist-browser-typed-client-mb.reliability.android.events/MAL-2026-12269.json"
cwes 
[
    {
        "cweId": "CWE-506",
        "description": "The product contains code that appears to be malicious in nature.",
        "name": "Embedded Malicious Code"
    }
]