SID 1:48062

Rule Category

FILE-OTHER -- Snort detected traffic targeting vulnerabilities in a file type that does not require enough rule coverage to have its own category.

Alert Message

FILE-OTHER Microsoft Powershell XML instantiation constrained language mode bypass attempt

Rule Explanation

This event is generated when a Powershell script designed to bypass Windows Device Guard policy traverses the corporate network. Impact: Attempted User Privilege Gain Details: The potential vulnerability here is a potential Constrained Language Mode Bypass within PowerShell v5.0+ via XML/XSL COM instantiation and transformation. This can lead to bypassing Device guard when enforced by policy. Ease of Attack:

What To Look For

No information provided

Known Usage

No public information

False Positives

No known false positives

Contributors

Cisco Talos Intelligence Group