🛡️ MAL-2026-12466 — streak-daykit

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

Description

Malicious code in streak-daykit (npm)

Source: amazon-inspector

On import of the package's main entry, a top-level _bootstrap IIFE in index.mjs runs a Linux-gated routine that detects a WSL environment by probing /mnt/c, locates the active Windows user profile via NTUSER.DAT, fetches an executable from a hex-obfuscated URL that decodes to a backlazeb2.com host (a typosquat of Backblaze B2's backblazeb2.com), and writes the payload as vite-native-helper.exe into AppData/Roaming/Microsoft/Windows/Start Menu/Programs/Startup on the host Windows account, establishing user-level autostart persistence. The remote URL, destination path, and dropped filename are all stored as split hex arrays joined at runtime and decoded via Buffer.from(h, 'hex').toString(), and surrounding comments frame the code as environment bootstrap and telemetry routing. No version pin, hash check, or publisher-matching source is present; the fetched binary is opaque attacker-controlled content executed on next Windows sign-in.

Affected software

MAL-2026-12466 is recorded against 1 package.

  • streak-daykit

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-daykit — —

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