This is a follow through from a video by John Hammond "How Hackers Can Hide PowerShell in Environment Variables". This code obfuscates your powershell commands.
For Example:
# Executes whoami
& ($env:CommonProgramFiles[25],$env:ProgramFiles[14],[char]120 -Join $70257) ([char]119,[char]104,$env:SESSIONNAME[1],$env:ProgramFiles[8],$env:CommonProgramFiles[19],$env:CommonProgramFiles[12] -Join $35034)