Malicious code in stellarfixer (npm)
--- _-= Per source details. Do not edit below this line.=-_ ## Source: amazon-inspector (bd3a96aa989ed6cadd106e8e7d04317ea30f83434a40eabc307578cb0690b78f) On npm install, the package's postinstall script unconditionally executes a bundled Windows PE at bin/stellarfn.exe via execFileSync. The binary is a.NET remote-access trojan: it opens a socket-based C2 channel (ClientSocket/BeginConnect/ConnectServer, SendMSG, SendBot/ChatID) with plugin loading (WriteAllBytes/ReadAllBytes), installs a low-level keyboard hook (SetWindowsHookEx + WH_KEYBOARD_LL + LowLevelKeyboardProc + ToUnicodeEx) tagged with active-window titles (GetForegroundWindow/GetActiveWindowTitle) for system-wide credential-grade keystroke capture, captures webcam frames (capCreateCaptureWindowA/capGetDriverDescriptionA), propagates to removable drives (USBThread/USBStart/USBSpread/RunDisk), and includes AV-exclusion, SetCurrentProcessIsCritical anti-kill, AES payload encryption, and an uninstaller. Installing this package on a Windows host results in immediate full-host compromise, remote attacker control, credential theft, and worm-like USB propagation.
Malicious code in stellarfixer (npm)
Description
--- _-= Per source details. Do not edit below this line.=-_ ## Source: amazon-inspector (bd3a96aa989ed6cadd106e8e7d04317ea30f83434a40eabc307578cb0690b78f) On npm install, the package's postinstall script unconditionally executes a bundled Windows PE at bin/stellarfn.exe via execFileSync. The binary is a.NET remote-access trojan: it opens a socket-based C2 channel (ClientSocket/BeginConnect/ConnectServer, SendMSG, SendBot/ChatID) with plugin loading (WriteAllBytes/ReadAllBytes), installs a low-level keyboard hook (SetWindowsHookEx + WH_KEYBOARD_LL + LowLevelKeyboardProc + ToUnicodeEx) tagged with active-window titles (GetForegroundWindow/GetActiveWindowTitle) for system-wide credential-grade keystroke capture, captures webcam frames (capCreateCaptureWindowA/capGetDriverDescriptionA), propagates to removable drives (USBThread/USBStart/USBSpread/RunDisk), and includes AV-exclusion, SetCurrentProcessIsCritical anti-kill, AES payload encryption, and an uninstaller. Installing this package on a Windows host results in immediate full-host compromise, remote attacker control, credential theft, and worm-like USB propagation.
Affected software
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Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- MAL-2026-13353
- Osv Schema Version
- 1.7.4
- Aliases
- []
- Ecosystems
- ["npm"]
- Database Specific Severity
- null
- Cvss Version
- null
Threat ID: 6a73851fbf8831d5394ef83a
Added to database: 08/05/2026, 18:46:55 UTC
Last updated: 08/05/2026, 18:46:55 UTC
Views: 1
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