MAL-2026-15560

See a problem?

Import Source

https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/supersignaturenature/MAL-2026-15560.json

JSON Data

https://api.osv.dev/v1/vulns/MAL-2026-15560

Aliases

GHSA-x67q-xvcf-f2rw

Published

2026-08-29T02:14:39Z

Modified

2026-08-29T20:30:11.390676891Z

Summary

Malicious code in supersignaturenature (npm)

Details

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

Source: amazon-inspector (ab1df02839294b29ff278b7a80505be50de75eb0f317f4bf29635236a75e4b15)

The published dist/ bundles (main/module/browser entrypoints) contain code absent from the src/ tree: at library load they read an encrypted rsaToken from a package file via readRSAFromPackage(), DES-decrypt it using a key imported from the dependency manager-thedate, and pipe the plaintext into childprocess.spawn('node', [],...) via stdin, executing the decrypted JavaScript in the installer's Node process. The DES key dependency is declared as "manager-thedate": "latest" in package.json, so the effective payload can be changed at any time by whoever controls that dependency, even though supersignaturenature itself is version-pinned. The src/ tree implements a straightforward Theta blockchain client with no fs, childprocess, DES, or spawn usage; the shipped dist/*.js contains var childprocess = require('childprocess'), function decryptToken(token, password) using CryptoJS.DES.decrypt, readRSAFromPackage, and rsa_exec.stdin.write(String(rsaDecrypted)) against a spawned node process. The runtime code is not a rollup of the shipped source, so review of src/ does not reveal the loader that consumers actually execute.

Source: ghsa-malware (5004322b8287b46b1d08bb827df71af4a4f723d8a4b88c25beca9f7709d5e7d2)

Any computer that has this package installed or running should be considered fully compromised. All secrets and keys stored on that computer should be rotated immediately from a different computer. The package should be removed, but as full control of the computer may have been given to an outside entity, there is no guarantee that removing the package will remove all malicious software resulting from installing it.

Database specific

{
    "malicious-packages-origins": [
        {
            "id": "IN-MAL-2026-019144",
            "modified_time": "2026-08-29T02:14:39Z",
            "import_time": "2026-08-29T02:22:21.400369521Z",
            "source": "amazon-inspector",
            "sha256": "16a45a7d4dd29a1780c37baa5b8508bea099660b71193d6b6a30ef02edaf37ca",
            "versions": [
                "1.0.5"
            ]
        },
        {
            "id": "IN-MAL-2026-019146",
            "source": "amazon-inspector",
            "import_time": "2026-08-29T02:22:21.5860358Z",
            "modified_time": "2026-08-29T02:14:55Z",
            "sha256": "ab1df02839294b29ff278b7a80505be50de75eb0f317f4bf29635236a75e4b15",
            "versions": [
                "1.0.6"
            ]
        },
        {
            "id": "GHSA-x67q-xvcf-f2rw",
            "ranges": [
                {
                    "type": "SEMVER",
                    "events": [
                        {
                            "introduced": "0"
                        }
                    ]
                }
            ],
            "source": "ghsa-malware",
            "import_time": "2026-08-29T20:22:41.209908964Z",
            "modified_time": "2026-08-29T19:26:32Z",
            "sha256": "5004322b8287b46b1d08bb827df71af4a4f723d8a4b88c25beca9f7709d5e7d2"
        }
    ]
}

References

Credits

- Amazon Inspector - FINDER
- - inspector-research@amazon.com

Affected packages

npm / supersignaturenature

Package

Name: supersignaturenature; View open source insights on deps.dev
Purl: pkg:npm/supersignaturenature

Affected ranges

Type: SEMVER
Events: Introduced

0Unknown introduced version / All previous versions are affected

Affected versions

1.*

1.0.5

1.0.6

Database specific

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"
    }
]

indicators

{
    "package_integrity": [
        {
            "filename": "supersignaturenature-1.0.5.tgz",
            "hashes": {
                "sha512_sri": "sha512-91qk/Pt0yTfBFHnOV4Q/aUgmRQqsmPL4jSBH6S1Oz3ThIA+wtmQng+D1ABVbITZF6lP3cIfISprJBpbEi0qi8Q==",
                "sha1": "c60ccc5333563e7f1ac1b4bb00aa6f4ccc72f3c4"
            }
        }
    ],
    "evidence_files": [
        {
            "path": "dist/supersignaturenature.esm.js",
            "tlsh": "5563949d26e7a060815b70b56fdb94407129e00b68ccd82cbdac53958fd946c9bf2ff8",
            "sha256": "728e2f4f054de13c9de5bbf8f8c010c4941402e254fcde43458240f39c70035e"
        },
        {
            "path": "dist/supersignaturenature.cjs.js",
            "tlsh": "cf63939d26e7a060815b70b56fdb94407129e00b68ccd82cbdac53958fd946c9bf2ff8",
            "sha256": "7776d30e6fe4073e6bbf09c93e7ae92f1b2109dd8543683fb3aeb5ccb6d76679"
        },
        {
            "path": "src/index.js",
            "tlsh": "9f01f7762ca68730813508c0764f282542f5e3137fa434a863672334cbc988dacac49b",
            "sha256": "2cdcb24d14af30ebda4c3dc548128d112790c00ad57c46b32972f828f9bcf0ce"
        },
        {
            "path": "package.json",
            "tlsh": "a8310d24cf24cdb345c825b9282a4547676988874c46f86c33954b4e4f4e27f22fa7be",
            "sha256": "f508b2ef4daed69216e1face0a1f6e8121b961a32a8809a417e9b097ded0ccf1"
        }
    ]
}

source

"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/supersignaturenature/MAL-2026-15560.json"