MAL-2026-4475

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Import Source

https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/aes-decode-runner-pro/MAL-2026-4475.json

JSON Data

https://api.osv.dev/v1/vulns/MAL-2026-4475

Published

2026-05-25T16:36:18Z

Modified

2026-05-26T17:01:46.219734979Z

Summary

Malicious code in aes-decode-runner-pro (npm)

Details

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

Source: amazon-inspector (2d889fb0fd8c7bc4564c187d81448427b737ff7fe4b78a7ffe6a23c429b83b93)

On require('aes-decode-runner-pro'), the entry point index.js immediately invokes pkg.run() (lines 1-3: const pkg = require("./custom-codec"); pkg.run();), which AES-256-GCM-decrypts a hardcoded ciphertext bundle using a hardcoded passphrase and salt shipped in src/config/defaults.js (DEFAULT_AES_PASSPHRASE = "default-dev-passphrase", DEFAULT_AES_SALT = "encode-npm-c-salt", DEFAULT_FINAL_ENCODED_TEXT = "wHKEM3UBnIY0UBU6:..."), passes the result through two additional custom codecs, and finally executes the cleartext with new Function(String(decoded.decodedPlainText))() at src/pipeline/custom-codec-pipeline.js:54. The README advertises only library functions and does not disclose this auto-execution behavior. Layered obfuscation (position codec + encode-decode codec + AES-GCM with an embedded key) whose sole in-package consumer is the load-time run() entry serves only to hide executable code from static review; the consuming developer cannot determine what runs without first executing it. The decrypted payload is fully attacker-controlled and runs in the installer's Node process whenever any downstream module imports this package.

Database specific

{
    "malicious-packages-origins": [
        {
            "source": "amazon-inspector",
            "sha256": "21c4286de42cc9b421b7bfb8451075f5fac3d004439cc19a78ffd3d6103e2935",
            "modified_time": "2026-05-25T16:44:05Z",
            "versions": [
                "1.0.3"
            ],
            "import_time": "2026-05-26T05:53:09.849927162Z",
            "id": "IN-MAL-2026-004725"
        },
        {
            "source": "amazon-inspector",
            "sha256": "7d2e4d5ff40593da9616ad9c185d324e9bd84253c7e73c63bbefb0e8ba84a5f0",
            "modified_time": "2026-05-25T16:40:25Z",
            "id": "IN-MAL-2026-004724",
            "versions": [
                "1.0.2"
            ],
            "import_time": "2026-05-26T05:53:09.755170225Z"
        },
        {
            "source": "amazon-inspector",
            "sha256": "abc470bfaa7f07d0b5c447c9340ea97f9623545acc703b8a143d4a49737bb50a",
            "modified_time": "2026-05-25T17:15:20Z",
            "versions": [
                "1.0.5"
            ],
            "import_time": "2026-05-26T05:53:10.283669433Z",
            "id": "IN-MAL-2026-004729"
        },
        {
            "source": "amazon-inspector",
            "sha256": "2d889fb0fd8c7bc4564c187d81448427b737ff7fe4b78a7ffe6a23c429b83b93",
            "modified_time": "2026-05-25T16:36:18Z",
            "versions": [
                "1.0.1"
            ],
            "import_time": "2026-05-26T05:53:09.607864311Z",
            "id": "IN-MAL-2026-004723"
        },
        {
            "source": "amazon-inspector",
            "sha256": "3343f3d9d7dfd91a206c28e4ec52f4615b830a46638d61e8dcea5a646c60dee1",
            "modified_time": "2026-05-26T15:33:27Z",
            "import_time": "2026-05-26T16:47:31.858420721Z",
            "id": "IN-MAL-2026-004931",
            "versions": [
                "1.0.7"
            ]
        },
        {
            "source": "amazon-inspector",
            "sha256": "5b57b940dbe6e5a732434a0f96f3d6e2253b147036af520642a17941e052b175",
            "modified_time": "2026-05-26T15:54:00Z",
            "versions": [
                "1.0.8"
            ],
            "import_time": "2026-05-26T16:47:31.944290505Z",
            "id": "IN-MAL-2026-004933"
        },
        {
            "sha256": "62b62112b1522fd678caca77d9627e6cf0bb1187188b1946655ae69e8efb1271",
            "source": "amazon-inspector",
            "modified_time": "2026-05-26T15:29:45Z",
            "import_time": "2026-05-26T16:47:31.818950899Z",
            "id": "IN-MAL-2026-004930",
            "versions": [
                "1.0.6"
            ]
        }
    ]
}

References

Credits

- Amazon Inspector - FINDER
- - actran@amazon.com

Affected packages

npm / aes-decode-runner-pro

Package

Name: aes-decode-runner-pro; View open source insights on deps.dev
Purl: pkg:npm/aes-decode-runner-pro

Affected ranges

Affected versions

1.*

1.0.1

1.0.2

1.0.3

1.0.5

1.0.6

1.0.7

1.0.8

Database specific

source

"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/aes-decode-runner-pro/MAL-2026-4475.json"

indicators

{
    "package_integrity": [
        {
            "filename": "aes-decode-runner-pro-1.0.3.tgz",
            "hashes": {
                "sha1": "11a8d8b7a152141f33133341294808a594772247",
                "sha512_sri": "sha512-8h37en6h3BeBKj6GJgGYMQ6dev2kzXrdo/SmFnbmmX8JtyuRHoRFUb6Cc6FuSCHZGsbJxxDX9uyXUPzNjNFXoA=="
            }
        }
    ],
    "evidence_files": [
        {
            "path": "index.js",
            "tlsh": "bea0247143f13370301440c0d005055144cfc3d3314070404d45d5d041cdc400133c40",
            "sha256": "ff42378f9099a83109c6143d8daad35d740db606a89639e61ece311100aef5f1"
        },
        {
            "sha256": "737deb01c41226ede865573174fa8787cdbf461cf78d8cf298bf9765b2b60aa3",
            "tlsh": "cd01b8207fa907a979601fe854386ce7b463f43ab50bb2850c3a82d242ee44304a568c",
            "path": "src/config/defaults.js"
        }
    ]
}

cwes

[
    {
        "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",
        "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",
        "cweId": "CWE-506"
    },
    {
        "description": "The product contains code that appears to be malicious in nature.",
        "name": "Embedded Malicious Code",
        "cweId": "CWE-506"
    }
]