🛡️ MAL-2026-12462 — streak-day-engine

⚪ Unknown ✅ No Known Exploit OSV
N/A
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

Malicious code in streak-day-engine (npm)

Source: amazon-inspector

index.mjs runs a hex-obfuscated top-level async IIFE at module import time. Identifiers and payload constants (process, fetch, child_process, fs/promises, target paths, URL, tar command, VBS template) are stored hex-encoded in a _c table and decoded via Buffer.from(h, 'hex').toString(). On import, the code fetches https://f004.backblazeb2.com/file/dp8hbvocjd2fpza/helper.tar.gz, writes the archive under the user's AppData directory, extracts it via tar -xzf, and writes a VBS launcher (vite-native-helper.vbs) into AppData/Roaming/Microsoft/Windows/Start Menu/Programs/Startup that uses CreateObject("WScript.Shell").Run p, 0, False to invoke the extracted RenameMe.exe hidden at every user login. Result: attacker-controlled bytes land on the installer's host on import/require of the package, and a login-persistent execution channel is established via the Windows Startup folder.

Affected software

MAL-2026-12462 is recorded against 1 package.

  • streak-day-engine

Timeline and source

Published on 5 August 2026. No public exploit is currently recorded for this entry. Record sourced from OSV.

References

www.npmjs.com (Package)

Details

Severity Unknown
CVSS Score N/A
CVSS Vector N/A
CWE N/A
Public Exploit ✅ No
Source OSV
Published 2026-08-05
Updated 2026-08-12
Modified 2026-08-05
Fix URL N/A

Affected Packages

Software From version Fixed in
streak-day-engine — —

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