MAL-2026-12847

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Import Source
https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/bigops-tinkoff-telephony-mock/MAL-2026-12847.json
JSON Data
https://api.osv.dev/v1/vulns/MAL-2026-12847
Aliases
  • GHSA-92wj-cj5h-gp6p
Published
2026-08-05T15:01:25Z
Modified
2026-08-06T01:20:00.936837457Z
Summary
Malicious code in bigops-tinkoff-telephony-mock (npm)
Details

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

Source: amazon-inspector (29cb54c5f503b1cad2b4ae932f592d8870df743b1c1b6b029616343b65f6ae09)

On require() of the package, index.js loads runtime.js which fetches a platform-specific binary from Cloudflare Workers hosts (oob-worker.cf102-baf.workers.dev and siblings) reconstructed at runtime from split string fragments, with a DNS TXT covert-channel fallback under sdk.dl.wel1.ru / ext.dl.wel1.ru / pkg.dl.wel1.ru / net.dl.wel1.ru. The fetched bytes are written to /tmp or %TEMP% under names disguised as.NET diagnostics files (dotnetdiag_*.exe,.cache_*), chmod'd 0755, and executed detached via /bin/sh -c '<path> &' or cmd /c start. No hash or signature verification is performed, and the destination hosts are unrelated to the package publisher. A second copy of the same dropper is bundled under lib/telemetry.js wrapped as a fake Sentry-like telemetry SDK. The package name mimics a Tinkoff telephony mock but the shipped code is a full-host remote-code-execution dropper against any machine that installs or imports it.

Source: ghsa-malware (38ba2813b46d8ed2bbdfceb6066bfecd7e32d7929f73906e88051b03ab1434c6)

Any computer that has this package installed or running should be considered fully compromised. All secrets and keys stored on that computer should be rotated immediately from a different computer. The package should be removed, but as full control of the computer may have been given to an outside entity, there is no guarantee that removing the package will remove all malicious software resulting from installing it.

Database specific 
{
    "malicious-packages-origins": [
        {
            "id": "IN-MAL-2026-015537",
            "modified_time": "2026-08-05T15:01:25Z",
            "source": "amazon-inspector",
            "sha256": "29cb54c5f503b1cad2b4ae932f592d8870df743b1c1b6b029616343b65f6ae09",
            "versions": [
                "35.5.1"
            ],
            "import_time": "2026-08-05T15:19:56.690284521Z"
        },
        {
            "id": "GHSA-92wj-cj5h-gp6p",
            "modified_time": "2026-08-05T17:18:36Z",
            "source": "ghsa-malware",
            "sha256": "38ba2813b46d8ed2bbdfceb6066bfecd7e32d7929f73906e88051b03ab1434c6",
            "ranges": [
                {
                    "type": "SEMVER",
                    "events": [
                        {
                            "introduced": "0"
                        }
                    ]
                }
            ],
            "import_time": "2026-08-06T00:58:53.329516249Z"
        }
    ]
}
References
Credits

Affected packages

npm / bigops-tinkoff-telephony-mock

Package

Name
bigops-tinkoff-telephony-mock
View open source insights on deps.dev
Purl
pkg:npm/bigops-tinkoff-telephony-mock

Affected ranges

Type
SEMVER
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

35.*
35.5.1

Database specific

cwes 
[
    {
        "description": "The product contains code that appears to be malicious in nature.",
        "name": "Embedded Malicious Code",
        "cweId": "CWE-506"
    },
    {
        "description": "The product contains code that appears to be malicious in nature.",
        "name": "Embedded Malicious Code",
        "cweId": "CWE-506"
    }
]
source 
"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/bigops-tinkoff-telephony-mock/MAL-2026-12847.json"
indicators 
{
    "evidence_files": [
        {
            "path": "_runtime.js",
            "sha256": "1f66340c368cbbe874b77f888e96910383590c5794b7b18044ad5933a7771f1d",
            "tlsh": "55a1a8aa176a70188b709be487174415f66be6633380c1d4fa6c69981fb712483b2efc"
        },
        {
            "sha256": "e2e6f2db215ba748e827ca9eb6d545f6e459cf261ede6ac9626a044747bb4ee5",
            "path": "lib/telemetry.js",
            "tlsh": "18835055566a242186b2b368df234107ff3685272643429dbafc82dc1fbd72092a5ffc"
        }
    ],
    "package_integrity": [
        {
            "filename": "bigops-tinkoff-telephony-mock-35.5.1.tgz",
            "hashes": {
                "sha1": "a778338831b6028b78eeff0fcac390c5df1bd138",
                "sha512_sri": "sha512-mShZcAM9KXGaHJ+XyPHQxrY9mZjazwrZ12cQjPSFxrKlgOcXH2NP7m3VfLTmxTtLeA0cA2a5caAui4V1XQJMsA=="
            }
        }
    ]
}