Stego Loader: Char-Code Obfuscated PS1 Dropped to %TEMP% Executed with Hidden Window

Ibrahim Saud@tektrix

•updated Jun 24, 2026•0•0•4

Detects the creation of a .ps1 script in the Windows AppData\Local\Temp directory followed by the execution of that script via PowerShell using hidden window flags (-WindowStyle Hidden) and policy bypass options (-ExecutionPolicy Bypass). This pattern is commonly associated with persistence mechanisms used by steganographic loaders to execute obfuscated payloads.