Millenium RAT Keylog Files Written to Obfuscated AppData Folder

Ibrahim Saud@tektrix

•updated Jun 30, 2026•0•0•5

Detects Millenium RAT writing captured keystrokes to specific obfuscated file paths or staging files. This behavior includes the creation of keylogger output files within a uniquely named AppData subdirectory (GTR1YB4A7s) or a temporary staging file (C:\debug.txt), which are artifacts used by the RAT before data exfiltration.