Presentations - Invoke-Obfuscation: PowerShell obFUsk8tion Techniques & How To (Try To) D""e`Tec`T 'Th'+'em'

  • Location: Security Theater
  • Speaker: Daniel Bohannon
  • Date and time: 22. October 2016. 11:50 - 12:35

PowerShell has increasingly become the de facto standard for penetration testers and hackers alike. It enables attackers to “live off the land” by using a Microsoft-signed binary that can execute remote code entirely in memory while bypassing both A/V and application whitelisting solutions. 
 
Today’s detection techniques monitor for certain strings in powershell.exe’s command-line arguments. While this provides tremendous value for most of today’s PowerShell attacks, I will introduce over a dozen obfuscation techniques that render today’s detection techniques grossly ineffective. These techniques will enable the innovative Red Team to continue using PowerShell undetected while challenging the Blue Team to identify these attacks more effectively.
Finally, I will unveil Invoke-Obfuscation.ps1 which will enable both Red and Blue Teams to effortlessly create highly obfuscated PowerShell commands so organizations can test their detection capabilities against these obfuscation techniques.

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Technical