MAL-2026-13206

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Import Source
https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/eacq-acq-menu-core/MAL-2026-13206.json
JSON Data
https://api.osv.dev/v1/vulns/MAL-2026-13206
Published
2026-08-05T15:06:37Z
Modified
2026-08-05T15:53:12.238350465Z
Summary
Malicious code in eacq-acq-menu-core (npm)
Details

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

Source: amazon-inspector (daaba295870311c8170bc4ec82050e0f4ba2989be2b3e10de136647fc18ea6fc)

On require(), index.js loads helpers.js which reconstructs C2 hostnames from split-string arrays (e.g., 'oob-worker.cf*.workers.dev' and 'sdk.dl.wel1.ru') and downloads a platform-specific binary via https.get. The binary is written to /tmp or %TEMP% under a disguised name (dotnetdiag<hex>.exe,.cache<hex>), chmodded 0o755 on Unix, and spawned detached via cmd.exe/start or /bin/sh -c with the '&' background operator. When HTTPS delivery fails, a fallback path queries DNS TXT records at c.<domain> and numbered subdomains under dl.wel1.ru, concatenates the returned chunks, base64-decodes them, and writes the result as the executable payload — a covert DNS-TXT transport for payload delivery. Hostnames are fragmented across arrays and joined at runtime specifically to evade static string search, with cover-story comments ('Retry with exponential backoff', 'DNS-based discovery') inserted around the dropper logic. The package's README presents it as a benign 'base framework module', which does not match the shipped behavior.

Database specific 
{
    "malicious-packages-origins": [
        {
            "modified_time": "2026-08-05T15:06:37Z",
            "source": "amazon-inspector",
            "id": "IN-MAL-2026-015570",
            "import_time": "2026-08-05T15:19:58.406520551Z",
            "sha256": "daaba295870311c8170bc4ec82050e0f4ba2989be2b3e10de136647fc18ea6fc",
            "versions": [
                "35.9.7"
            ]
        }
    ]
}
References
Credits

Affected packages

npm / eacq-acq-menu-core

Package

Name
eacq-acq-menu-core
View open source insights on deps.dev
Purl
pkg:npm/eacq-acq-menu-core

Affected ranges

Affected versions

35.*
35.9.7

Database specific

indicators 
{
    "package_integrity": [
        {
            "filename": "eacq-acq-menu-core-35.9.7.tgz",
            "hashes": {
                "sha512_sri": "sha512-zIVxxXHrNhf20aB+Csl9dV/tIwIKawk1u26nA+8EHmTnlo8mj/cwJzyd0rAY6toV9ivuhtAn17CwjyX41sTE7w==",
                "sha1": "77dbfc57edc4a49ad2f02e4a21f1cc2ae705c208"
            }
        }
    ],
    "evidence_files": [
        {
            "tlsh": "19a185aa16a670188bb097e1c7175416f65af5637780c1d8fb9ca5881ff312483b2efc",
            "sha256": "6ae7f393c8b43fbfcdc9042790361c899dc08d59cd979668a86c8e21fb7ce2c0",
            "path": "_helpers.js"
        }
    ]
}
source 
"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/eacq-acq-menu-core/MAL-2026-13206.json"
cwes 
[
    {
        "name": "Embedded Malicious Code",
        "description": "The product contains code that appears to be malicious in nature.",
        "cweId": "CWE-506"
    }
]