Check Point Advisories

PowerShell Script Encoding Evasion

Vulnerability
Protection

Check Point Reference:	CPAI-2017-0473
Date Published:	7 Jun 2017
Severity:	Critical
Last Updated:	Monday 22 October, 2018
Source:
Protection Provided by:	Security Gateway R81, R80, R77, R75
Who is Vulnerable?
Vulnerability Description	Certain evasion tools obfuscate powershell scripts in order to circumvent inspection by security software. An attacker could use such evasion methods in order to execute arbitrary code on the target.

Protection Overview

This protection detects attempts to exploit this vulnerability.

In order for the protection to be activated, update your Security Gateway product to the latest IPS update. For information on how to update IPS, go to SBP-2006-05, click on Protection tab and select the version of your choice.

Security Gateway R80 / R77 / R75

In the IPS tab, click Protections and find the PowerShell Script Encoding Evasion protection using the Search tool and Edit the protection's settings.
Install policy on all Security Gateways.

This protection's log will contain the following information:

Attack Name: Content Protection Violation.
Attack Information: PowerShell Script Encoding Evasion