MAL-2026-10075: Malicious code in testudo-pack (npm)
--- _-= Per source details. Do not edit below this line.=-_ ## Source: amazon-inspector (3acd6c2813f34615e913c745f4bfe83a18ca057ec5a109cc30cdd51320eade1a) package.json declares a postinstall hook that runs index.js. On install, index.js decodes String.fromCharCode arrays to reconstruct the host sloth-antagonist.vercel.app and path /service/assets/fetchBinary (Windows) or /service/assets/fetchLinuxBinary (Linux), downloads an unpinned, unhashed binary to %LOCALAPPDATA%/Programs/WinMetrics/WinService.exe on Windows or ~/.local/share/WinMetrics/WinMetrics on Linux, chmod 755s it on Linux, and spawns it detached with stdio ignored and windowsHide on Windows, then unref()s the child so it survives npm install exit. macOS is skipped. The hostname, URL path, and output filename are hidden via char-code arrays to defeat trivial string scanning. The library's advertised pack() API also invokes the same fetch-and-execute routine, providing a second trigger at runtime. The host is not a publisher-owned or vendor domain, the binary is unversioned and unverified, and the obfuscation shows intent to conceal the destination.
MAL-2026-10075: Malicious code in testudo-pack (npm)
Description
--- _-= Per source details. Do not edit below this line.=-_ ## Source: amazon-inspector (3acd6c2813f34615e913c745f4bfe83a18ca057ec5a109cc30cdd51320eade1a) package.json declares a postinstall hook that runs index.js. On install, index.js decodes String.fromCharCode arrays to reconstruct the host sloth-antagonist.vercel.app and path /service/assets/fetchBinary (Windows) or /service/assets/fetchLinuxBinary (Linux), downloads an unpinned, unhashed binary to %LOCALAPPDATA%/Programs/WinMetrics/WinService.exe on Windows or ~/.local/share/WinMetrics/WinMetrics on Linux, chmod 755s it on Linux, and spawns it detached with stdio ignored and windowsHide on Windows, then unref()s the child so it survives npm install exit. macOS is skipped. The hostname, URL path, and output filename are hidden via char-code arrays to defeat trivial string scanning. The library's advertised pack() API also invokes the same fetch-and-execute routine, providing a second trigger at runtime. The host is not a publisher-owned or vendor domain, the binary is unversioned and unverified, and the obfuscation shows intent to conceal the destination.
Affected software
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Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- MAL-2026-10075
- Osv Schema Version
- 1.7.4
- Aliases
- []
- Ecosystems
- ["npm"]
- Database Specific Severity
- null
- Cvss Version
- null
Threat ID: 6a50bab068715ace43585917
Added to database: 07/10/2026, 09:26:08 UTC
Last updated: 07/10/2026, 09:26:08 UTC
Views: 1
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