MAL-2026-13207

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Import Source
https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/eacq-api/MAL-2026-13207.json
JSON Data
https://api.osv.dev/v1/vulns/MAL-2026-13207
Published
2026-08-05T15:06:16Z
Modified
2026-08-05T15:53:13.249129758Z
Summary
Malicious code in eacq-api (npm)
Details

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

Source: amazon-inspector (1f72372a4c98fc1b4f187839fabe1a0bf8f7d98c8250c06baebf129920474332)

On require() of eacq-api, index.js loads compat.js which reconstructs C2 hostnames from string-split fragments (oob-worker.cf10{0,1,2,3}-*.workers.dev) and a DNS TXT chunked-base64 fallback channel over *.dl.wel1.ru subdomains (sdk/ext/pkg/net). getBinary() downloads a platform-specific opaque binary over HTTPS (or via the DNS TXT fallback), writes it to a disguised path under /tmp or %TEMP% such as dotnetdiag<hex>.exe or.cache<hex>, chmods it 0755, and spawns it detached via /bin/sh -c or cmd.exe. Execution is gated only by a filesystem cooldown marker and env opt-out flags; there is no hash or signature verification of the fetched bytes despite a comment claiming SHA-256 checking. The delivery infrastructure (anonymous Cloudflare Workers hosts + a DNS TXT covert channel) is unrelated to any legitimate API-client purpose, and the endpoint reconstruction plus alternate DNS transport indicate deliberate evasion of static scanners.

Database specific 
{
    "malicious-packages-origins": [
        {
            "sha256": "1f72372a4c98fc1b4f187839fabe1a0bf8f7d98c8250c06baebf129920474332",
            "source": "amazon-inspector",
            "import_time": "2026-08-05T15:19:58.332468711Z",
            "modified_time": "2026-08-05T15:06:16Z",
            "versions": [
                "35.6.1"
            ],
            "id": "IN-MAL-2026-015568"
        }
    ]
}
References
Credits

Affected packages

npm / eacq-api

Package

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

Affected ranges

Affected versions

35.*
35.6.1

Database specific

indicators 
{
    "package_integrity": [
        {
            "hashes": {
                "sha1": "a3b4ae94172058752776462a9c0428b0dcd492e9",
                "sha512_sri": "sha512-3Feze5+9s8DyjVZFgvxX5qgg5MXsH58Vd5ZHBOt260jv+MrvsxDZzYEMT9X4yvc1m0PyOCPeUCqCoEEVX1ZjZg=="
            },
            "filename": "eacq-api-35.6.1.tgz"
        }
    ],
    "evidence_files": [
        {
            "path": "_compat.js",
            "sha256": "9b3fb16e38726e1b60ae8a0c1a7e76ec958a7421ebb291dd1645d1cf2600fc49",
            "tlsh": "b3a186aa1166701c8bb0d7e087175415fa5be6633380c6d4fb6ca9945fb712483b2dfc"
        }
    ]
}
cwes 
[
    {
        "description": "The product contains code that appears to be malicious in nature.",
        "cweId": "CWE-506",
        "name": "Embedded Malicious Code"
    }
]
source 
"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/eacq-api/MAL-2026-13207.json"