MAL-2026-5419

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Import Source
https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/@nstrlabs/auth/MAL-2026-5419.json
JSON Data
https://api.osv.dev/v1/vulns/MAL-2026-5419
Published
2026-06-09T17:38:33Z
Modified
2026-06-09T19:01:27Z
Summary
Malicious code in @nstrlabs/auth (npm)
Details

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

Source: amazon-inspector (608be3457e7c809e60c1b76b9406489652f0ef708bfb97db2b6e0bb92b6836c2)

On npm install, the package's preinstall hook (node index.js || true, declared in package.json) automatically collects host identifiers — os.hostname(), os.userInfo().username, __dirname, and process.cwd() — and exfiltrates them through two channels: (1) a DNS lookup to a hex-encoded subdomain of d8jbmnsqcfu78dfs8vdg34ohqhirb4pbg.oast.live (an out-of-band interaction canary), and (2) an HTTP POST of the JSON payload to the bare IP 172.201.213.59 on port 9090 at path /c. The package ships no other functionality; the entire codebase is a beacon. Combined with the implausible version 99.0.0, the @nstrlabs scope, and the self-described 'security research' purpose, this has the canonical shape of a dependency-confusion attack against a private @nstrlabs/auth namespace, where any organization that mistakenly resolves the public registry copy will leak internal hostnames and developer identities to the attacker.

Database specific 
{
    "malicious-packages-origins": [
        {
            "id": "IN-MAL-2026-005084",
            "import_time": "2026-06-09T17:45:53.587914077Z",
            "modified_time": "2026-06-09T17:38:33Z",
            "sha256": "f9efcc731c346683d950fd8237f2ca892a7971d0cc340a48efcb60ba02abe851",
            "source": "amazon-inspector",
            "versions": [
                "99.0.1"
            ]
        },
        {
            "id": "IN-MAL-2026-005085",
            "import_time": "2026-06-09T17:45:53.674662511Z",
            "modified_time": "2026-06-09T17:38:34Z",
            "sha256": "fe577c55bca36113c93b1486725ad4f853775354bd6a7c6e0eb6c300652e2ae4",
            "source": "amazon-inspector",
            "versions": [
                "99.0.1"
            ]
        },
        {
            "id": "IN-MAL-2026-005140",
            "import_time": "2026-06-09T18:50:18.979896088Z",
            "modified_time": "2026-06-09T17:55:11Z",
            "sha256": "608be3457e7c809e60c1b76b9406489652f0ef708bfb97db2b6e0bb92b6836c2",
            "source": "amazon-inspector",
            "versions": [
                "99.0.0"
            ]
        },
        {
            "id": "IN-MAL-2026-005141",
            "import_time": "2026-06-09T18:50:19.047105866Z",
            "modified_time": "2026-06-09T17:55:12Z",
            "sha256": "6af43df85e84a095699136acc4e3a92111b93764db3d276288e842f3bb17e575",
            "source": "amazon-inspector",
            "versions": [
                "99.0.0"
            ]
        }
    ]
}
References
Credits

Affected packages

npm / @nstrlabs/auth

Package

Name
@nstrlabs/auth
View open source insights on deps.dev
Purl
pkg:npm/%40nstrlabs%2Fauth

Affected ranges

Affected versions

99.*
99.0.0
99.0.1

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"
    }
]
indicators 
{
    "domains": [
        "7b2268223a227363616e2d383061353435396136636531222c2275223a22.7363616e222c2264223a222f686f6d652f7363616e2f6e6f64655f6d6f64.756c65732f406e7374726c6162732f61757468222c2263223a222f686f6d.d8jbmnsqcfu78dfs8vdg34ohqhirb4pbg.oast.live"
    ],
    "evidence_files": [
        {
            "path": "index.js",
            "sha256": "a5c8f88f5e6d4cf0276663c90c5a7a1541ccb5d8ccf5f0572eba978a471c2009",
            "tlsh": "97f0e1e161a0d1f9db749590bdd4668457f3d656b04288f0dc4d0fcf46c24d05d7a9e1"
        },
        {
            "path": "package.json",
            "sha256": "60d66ded9081740e219376d96da03a13fba029bfc8deb333b64ae7ed22146e3b",
            "tlsh": "0ec012681920b4366b5182f169756c8d61e9821410844c044ae205b494b1b9c807d055"
        }
    ],
    "package_integrity": [
        {
            "filename": "auth-99.0.1.tgz",
            "hashes": {
                "sha1": "9d2eed52709be5e8eddaec23eed885fe8661aa2c",
                "sha512_sri": "sha512-2obfqZkT8rhth75HuNv9/nO1eLpsiAOGz8GYOMQbMghC6oUdlUkH2LKQl4wH5IZDvICN5Ty0MVSRqlKFyiESLQ=="
            }
        }
    ]
}
source 
"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/@nstrlabs/auth/MAL-2026-5419.json"