Millenium RAT Keylogger: user32.dll Load from AppData/Temp + Telegram Exfil

Ibrahim Saud@tektrix

•updated Jun 30, 2026•0•0•0

This rule detects an unsigned process executing from the AppData or Temp directories that loads user32.dll, a required step for installing keyboard hooks (SetWindowsHookEx). This activity is correlated with network connections from the same process to the Telegram Bot API, a common technique for exfiltrating captured keystrokes or other sensitive data.