MAL-2026-15901

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Import Source
https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/net-util-y8/MAL-2026-15901.json
JSON Data
https://api.osv.dev/v1/vulns/MAL-2026-15901
Published
2026-09-04T03:46:33Z
Modified
2026-09-04T04:30:05.866309201Z
Summary
Malicious code in net-util-y8 (npm)
Details

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

Source: amazon-inspector (d1e81ce327647324756e0ea15d1016d45cd5bb092dd0099418ba2db59eca98a7)

The package has no real functionality: index.js contains only an empty comment and package.json declares no exports or lifecycle scripts. The description field in package.json is a ~56KB base64 blob that decodes to a ~42KB POSIX shell script implementing an XMRig Monero miner dropper. The decoded script preflights curl/wget/openssl and perl (installing them via the system package manager with root privileges if missing), fetches XMRig binaries from gitlab.com/albertotrindade131/al and a ghfast.top proxy in front of github.com/lucas77335/xmrig-amd releases, points the miner at the pool xmr.kryptex.network:8029 with a hardcoded Monero wallet address (883kAB7Ufo...gBCFH), and includes routines to kill competing miners and mask its process name. The script also references a sibling package net-util-x7 and a registry-latest lookup at registry.npmjs.org/cbc97b7a/latest, indicating this is a staging component of a multi-package cryptomining campaign. Encoding an executable payload inside the manifest description field is a smuggling technique to keep the payload off code-scanning paths while still shipping it in the published tarball.

Database specific 
{
    "malicious-packages-origins": [
        {
            "sha256": "d1e81ce327647324756e0ea15d1016d45cd5bb092dd0099418ba2db59eca98a7",
            "versions": [
                "1.1788432509.0"
            ],
            "modified_time": "2026-09-04T03:46:33Z",
            "import_time": "2026-09-04T04:21:21.252095623Z",
            "id": "IN-MAL-2026-019458",
            "source": "amazon-inspector"
        }
    ]
}
References
Credits

Affected packages

npm / net-util-y8

Package

Name
net-util-y8
View open source insights on deps.dev
Purl
pkg:npm/net-util-y8

Affected ranges

Affected versions

1.*
1.1788432509.0

Database specific

indicators 
{
    "evidence_files": [
        {
            "tlsh": "f84318b7dd473e0d8b29a4121ddf09d95e0d238f307240cfa65bbb49511f1aeaac41aa",
            "sha256": "6559f7a385676256d43cc624e79dbb704edf15c1d6832568a39f5f5d2608398d",
            "path": "package.json"
        }
    ],
    "package_integrity": [
        {
            "hashes": {
                "sha512_sri": "sha512-FvnDMun9V+7IkOzv5sZahVvKh0OgZd2EBk7h/JiKL0aI3zczdZwV3fDQfSrLYIL5pP9OdmZW17wA66Qpywx7mA==",
                "sha1": "d21b5dc29107c119ba0ef3311402d07cf762ffd2"
            },
            "filename": "net-util-y8-1.1788432509.0.tgz"
        }
    ]
}
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/net-util-y8/MAL-2026-15901.json"