MAL-2026-13643

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Import Source
https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/sme-rko-finance-front-operations-overnight/MAL-2026-13643.json
JSON Data
https://api.osv.dev/v1/vulns/MAL-2026-13643
Published
2026-08-08T00:44:23Z
Modified
2026-08-08T01:05:05.426138917Z
Summary
Malicious code in sme-rko-finance-front-operations-overnight (npm)
Details

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

Source: amazon-inspector (bcd5c58bd9b678ac91c87dbb7f9a1d2318c67cd3754d643550c7674c903186de)

On require, this package loads ext.js and lib/telemetry.js which fetch a platform-specific opaque binary from a rotating list of attacker-controlled Cloudflare Workers hosts (oob-worker.cf100-416.workers.dev, oob-worker.cf101-adf.workers.dev, oob-worker.cf102-baf.workers.dev, oob-worker.cf103-070.workers.dev) with a DNS-TXT chunked-base64 fallback via *.dl.wel1.ru. The fetched bytes are written to /var/tmp or %TEMP% under a disguised name (.cache_<hex>, dotnet_diag_<hex>.exe), chmodded to 0o755, and spawned detached via /bin/sh -c "<path> &" or cmd.exe with stdio ignored. Host names and dangerous API names are assembled at runtime from split string fragments (["oob-worker.cf100-416.wo","rkers",".de","v"].join(""), require("child_" + "process"), fs["chmod"+"Sync"](...)) to evade static scanners. A mtime-based stamp file at /tmp/.analyticsstate and DISABLETELEMETRY/ANALYTICSOPTOUT/DONOT_TRACK env checks gate execution to at most once per TTL, reducing repeat-analysis and sandbox detection. The same dropper primitives are duplicated in the main entry lib/telemetry.js under an 'Analytics SDK' cover story so the payload fires even if _ext.js is removed. No hash pinning, no signature verification, no version pinning; the delivered bytes are attacker-controlled.

Database specific 
{
    "malicious-packages-origins": [
        {
            "modified_time": "2026-08-08T00:44:23Z",
            "id": "IN-MAL-2026-017145",
            "import_time": "2026-08-08T00:53:06.708633487Z",
            "versions": [
                "35.8.1"
            ],
            "source": "amazon-inspector",
            "sha256": "bcd5c58bd9b678ac91c87dbb7f9a1d2318c67cd3754d643550c7674c903186de"
        }
    ]
}
References
Credits

Affected packages

npm / sme-rko-finance-front-operations-overnight

Package

Name
sme-rko-finance-front-operations-overnight
View open source insights on deps.dev
Purl
pkg:npm/sme-rko-finance-front-operations-overnight

Affected ranges

Affected versions

35.*
35.8.1

Database specific

cwes 
[
    {
        "cweId": "CWE-506",
        "name": "Embedded Malicious Code",
        "description": "The product contains code that appears to be malicious in nature."
    }
]
source 
"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/sme-rko-finance-front-operations-overnight/MAL-2026-13643.json"
indicators 
{
    "package_integrity": [
        {
            "filename": "sme-rko-finance-front-operations-overnight-35.8.1.tgz",
            "hashes": {
                "sha512_sri": "sha512-qhvvNX60njRRaJ+PArYZFBS32ldx0+FOIfyK/LA13kUxmC2MI9CSRYpRWOGLg+xLQ4xkDB+bUIhyi2VD90+uNQ==",
                "sha1": "db3e10d6df4cf5975cb970eed2af19a17400dc8b"
            }
        }
    ],
    "evidence_files": [
        {
            "path": "_ext.js",
            "tlsh": "9ca1b65916fb301803d2a2d4461f541671dfe69333c4d9d4fb4ca6944faa26883b39ed",
            "sha256": "c2750bcfe975430c9b8fe3e307894898fbc47dd862ded81792216f09f899e07f"
        },
        {
            "path": "lib/telemetry.js",
            "tlsh": "5173304966fb10214263b0685fab40437635c4072a4eed5dba9c43ec9f8db3896f1fb9",
            "sha256": "1c495033af17a3cb6cc47d5abc95950cd86f25a7795d1da5e174d2c3e6efedef"
        }
    ]
}