MAL-2026-17773

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Import Source
https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/nested-lib/MAL-2026-17773.json
JSON Data
https://api.osv.dev/v1/vulns/MAL-2026-17773
Published
2026-10-11T13:53:33Z
Modified
2026-10-11T14:30:06Z
Summary
Malicious code in nested-lib (npm)
Details

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

Source: amazon-inspector (0a0b849de5330a4a4984a855f83ce1638b17e459d359312319ff35dc0e02f928)

The package declares scripts.postinstall = "node beacon.cjs" and index.js also invokes require('./beacon.cjs').fire() at module load. beacon.cjs POSTs a JSON payload containing os.hostname(), __dirname, process.cwd(), and process.version over plain HTTP to the hardcoded bare-IP endpoint http://185.158.107.175:8787/_ah/dc. The destination is not a documented first-party service and the host identifiers are sent without any opt-in. index.js otherwise exports a Proxy that returns no-op functions for every property access, so the package provides no real functionality — its sole on-install and on-require effect is the beacon. The combination of a hollow Proxy shim, a bare-IP plain-HTTP destination, and automatic firing from both the npm lifecycle hook and the main module is consistent with a reconnaissance/confirmation beacon used to validate successful installation into target environments, typically preceding a second-stage payload.

Database specific 
{
    "malicious-packages-origins": [
        {
            "id": "IN-MAL-2026-021399",
            "import_time": "2026-10-11T14:18:02.421043506Z",
            "modified_time": "2026-10-11T13:53:33Z",
            "sha256": "0a0b849de5330a4a4984a855f83ce1638b17e459d359312319ff35dc0e02f928",
            "source": "amazon-inspector",
            "versions": [
                "1.0.0"
            ]
        },
        {
            "id": "IN-MAL-2026-021402",
            "import_time": "2026-10-11T14:18:02.670836204Z",
            "modified_time": "2026-10-11T13:53:58Z",
            "sha256": "ab87d579d75ebc0c4d4bbeeb2d27aedbe7350e0522cd34b00947f7d802d9148f",
            "source": "amazon-inspector",
            "versions": [
                "1.0.1"
            ]
        },
        {
            "id": "IN-MAL-2026-021404",
            "import_time": "2026-10-11T14:18:02.794246981Z",
            "modified_time": "2026-10-11T13:54:17Z",
            "sha256": "b5cf1b7875d61d769d7b3d89e1695a3bd8425947919ef47cae55579700507ab9",
            "source": "amazon-inspector",
            "versions": [
                "1.1.0"
            ]
        }
    ]
}
References
Credits

Affected packages

npm / nested-lib

Package

Name
nested-lib
View open source insights on deps.dev
Purl
pkg:npm/nested-lib

Affected ranges

Affected versions

1.*
1.0.0
1.0.1
1.1.0

Database specific

cwes 
[
    {
        "cweId": "CWE-506",
        "description": "The product contains code that appears to be malicious in nature.",
        "name": "Embedded Malicious Code"
    },
    {
        "cweId": "CWE-506",
        "description": "The product contains code that appears to be malicious in nature.",
        "name": "Embedded Malicious Code"
    },
    {
        "cweId": "CWE-506",
        "description": "The product contains code that appears to be malicious in nature.",
        "name": "Embedded Malicious Code"
    }
]
indicators 
{
    "evidence_files": [
        {
            "path": "beacon.cjs",
            "sha256": "f3f0a7ededa67ce0264ed76a0ca75689b8f775a28325bffcf6f23edc770b9986",
            "tlsh": "4f3141eba8e1a048aaa67498c54f1409f17af4069501ab54f95c82955f6193c33fa8dc"
        },
        {
            "path": "index.js",
            "sha256": "a86a4da763bbb34c16f361abe7aab66d5df591b66867ac8160041f932159b08d",
            "tlsh": "2201d0d7225661b10b5221a4978f43c4a3b99d74027941d0d84a9226365108c463b8ee"
        }
    ],
    "package_integrity": [
        {
            "filename": "nested-lib-1.0.0.tgz",
            "hashes": {
                "sha1": "4a042363b02ff38857adcf2e16a138e65d57fce4",
                "sha512_sri": "sha512-JMIYKfglrdDxK9Mwd/AJ3inVI4QkwkM1GwchfVgPMo1mjlN2Xxcx8anEw+RKXrBB5lMFskEBk+T1i5mM/hWcfw=="
            }
        }
    ]
}
source 
"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/nested-lib/MAL-2026-17773.json"