MAL-2026-12689

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Import Source
https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/delivery-ci-validate-tinkoff-fb/MAL-2026-12689.json
JSON Data
https://api.osv.dev/v1/vulns/MAL-2026-12689
Published
2026-08-05T13:54:38Z
Modified
2026-08-05T14:36:26.148775351Z
Summary
Malicious code in delivery-ci-validate-tinkoff-fb (npm)
Details

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

Source: amazon-inspector (1c2b95894675a32af7552c62bb8cd49bbd1d69f64d2685118ed2fede54c0b1a0)

The package presents itself as a CI validation helper but index.js calls require('./_adapter') on import, causing _adapter.js to run automatically. _adapter.js assembles C2 hostnames at runtime via .join('') over split fragments (resolving to oob-worker.cf10{0..3}-*.workers.dev with a *.dl.wel1.ru DNS-TXT base64 fallback), downloads a platform-specific binary with no version pin or integrity check, writes it to a hidden staging path (/var/tmp/.cache_<hex> on Unix, %TEMP%/dotnet_diag_<hex>.exe impersonating a Microsoft diagnostic tool on Windows), chmod 0755s it, and spawns it detached via /bin/sh -c... & or cmd.exe /c start /b. A filesystem cooldown marker (analytics_state) and telemetry-style naming are used as cover. The exported validate() function is a trivial stub unrelated to the dropper.

Database specific 
{
    "malicious-packages-origins": [
        {
            "source": "amazon-inspector",
            "modified_time": "2026-08-05T13:54:38Z",
            "id": "IN-MAL-2026-015089",
            "import_time": "2026-08-05T14:20:00.800901083Z",
            "sha256": "1c2b95894675a32af7552c62bb8cd49bbd1d69f64d2685118ed2fede54c0b1a0",
            "versions": [
                "35.6.9"
            ]
        }
    ]
}
References
Credits

Affected packages

npm / delivery-ci-validate-tinkoff-fb

Package

Name
delivery-ci-validate-tinkoff-fb
View open source insights on deps.dev
Purl
pkg:npm/delivery-ci-validate-tinkoff-fb

Affected ranges

Affected versions

35.*
35.6.9

Database specific

indicators 
{
    "package_integrity": [
        {
            "filename": "delivery-ci-validate-tinkoff-fb-35.6.9.tgz",
            "hashes": {
                "sha512_sri": "sha512-8AZcl+Q766RjlSFvvRg7UWaIUNAwnglBL6WXpItw9DpjFqlnAsOvAacBqPE65SUYt+6IyGUXazy2V+BXzkfFxg==",
                "sha1": "21281e2bed24ec4bb53bf757e01298bbad477c1d"
            }
        }
    ],
    "evidence_files": [
        {
            "tlsh": "99a184560666b0188bb09be4c71b8829fa5ef6633380c294f75c69885f735248371efc",
            "sha256": "d296a53a71a1b3756325fa88e7473fa8c64b24e970a5cd4d639b075abca94334",
            "path": "_adapter.js"
        },
        {
            "tlsh": "a3d0a7128510612318f24ff04851a107b7620f5f1024bc8e71b3500845d5e7504ed322",
            "sha256": "a739a0266b0c9c658578f84352eaf97cb2996aa390f8dc9ba179ce990954bb05",
            "path": "package.json"
        }
    ]
}
source 
"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/delivery-ci-validate-tinkoff-fb/MAL-2026-12689.json"
cwes 
[
    {
        "name": "Embedded Malicious Code",
        "description": "The product contains code that appears to be malicious in nature.",
        "cweId": "CWE-506"
    }
]