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VanguardTrace

Decrypting and Intercepting Encrypted Imports of Vanguard's Kernel Driver

Welcome to VanguardTrace, a tool designed to decrypt and intercept encrypted imports within Vanguard's Kernel Driver.

Overview

I began my exploration of vgk.sys and its import protection mechanisms. One strategy that immediately occurred to me for gaining insight was to employ a patchguard bypass. By hooking potential imports and capturing their return addresses, I could trace back to where vgk.sys calls these imports. This approach led me directly to their decryption algorithm. With a clear understanding of this algorithm, I proceeded to rewrite it for readability and created the complementary encryption function. Additionally, I developed functions to determine the starting offset of the imports encryption "table" using a simple signature scan, and to retrieve the offset of specific imports of interest.

Features

• Decryption: Decrypt encrypted imports within Vanguard's Kernel Driver.
• Interception: Intercept and manipulate encrypted imports.
• Pointer Encryption: Encrypt pointers with their encryption routine to assist with intercepting.
• Automatic Import Table Location: Automatically locate the start of the encrypted import table using a signature scan.
• Offset Identification: Identify the offset of the desired import for easy manipulation/hooking.

Example Usage

License

This project is licensed under the MIT License.