MAL-2026-15560

Dashboard / Malicious Package / MAL-2026-15560

MAL-2026-15560

Summary: Malicious code in supersignaturenature (npm)

Details: 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 child_process.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, child_process, DES, or spawn usage; the shipped dist/*.js contains var child_process = require('child_process'), 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.

References: https://www.npmjs.com/package/supersignaturenature/v/1.0.5, https://www.npmjs.com/package/supersignaturenature/v/1.0.6, https://github.com/advisories/GHSA-x67q-xvcf-f2rw