Nowadays, the most common technique to bypass application whitelisting is to start PowerShell, because the target code can be passed inside arguments, it has full access to the Windows API, it is a signed binary from Microsoft and it can be found on all newer systems. Since this file is already on the system and it has a valid signature, it will be whitelisted by the application whitelisting solution. That means we can find node.js on systems with NVIDIA drivers installed. This is a renamed version of node.js (but signed by NVIDIA Corporation) which can be verified via the meta data of the file: %ProgramFiles(x86)\%NVIDIA Corporation\NvNode\NVIDIA Web Helper.exe ![]() The following executable gets installed by NVIDIA: ĭuring a quick research in a different area, I came across a system which had NVIDIA drivers installed. Other good and recommended sources of known bypass techniques and hardening guides are blog posts from Casey Smith (subtee), Matt Nelson (enigma0x3) and Matt Graeber (mattifestation). Knowing these bypass techniques is really important for administrators who maintain such protected environments because special rules must be applied to prevent these attacks. SEC Consult Vulnerability Lab is doing research in this area since several years, bypass techniques were already presented in 20 at conferences such as CanSecWest, DeepSec, Hacktivity, BSides Vienna and IT-SeCX, see. This can be achieved on Microsoft Windows 10 or Server 2016 with Microsoft Device Guard. Another concept is to enforce code and script integrity via signatures. Application Whitelisting Update : NVIDIA has resolved the issue very promptly and published a corresponding security bulletin here.Ī very commonly used solution for application whitelisting is Microsoft AppLocker.
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