Hacking Tools

PatchlessCLRLoader – Advancing .NET Assembly Execution With Hardware Breakpoint Techniques

PatchlessCLRLoader is a fork of InlineExecute-Assembly to load .NET assembly and direct the output to mailslot. I rewrites it to a standalone loader with the following implementation:

  • AES encryption payload
  • Fileless payload support
  • Patchless AMSI and ETW bypass using hardware breakpoint

Remarks:The loader only supports setting HWBP in main thread currently.

Using hardware breakpoints for patchless bypass has multiple advantages over traditional patching techniques.

Firstly, it avoids using widely-known APIs such as NtProtectVirtualMemory, which are closely monitored by security solutions.

Secondly, hardware breakpoints do not require any modification to the files, which could be detected by file integrity monitoring or EDR, resulting in a relatively stealthy approach.

Execute

PatchlessCLRLoader.exe <payload> <key> <arguments>

Bug

The process may hang due to an access violation during CLR, but this issue can be overcome by using output function of the loaded .NET assembly, if it is supported. (e.g. -outputfile of Seatbelt). Pending Fix.

Varshini

Varshini is a Cyber Security expert in Threat Analysis, Vulnerability Assessment, and Research. Passionate about staying ahead of emerging Threats and Technologies.

Recent Posts

How to Install Docker on Ubuntu (Step-by-Step Guide)

Docker is a powerful open-source containerization platform that allows developers to build, test, and deploy…

4 days ago

Uninstall Docker on Ubuntu

Docker is one of the most widely used containerization platforms. But there may come a…

4 days ago

Admin Panel Dorks : A Complete List of Google Dorks

Introduction Google Dorking is a technique where advanced search operators are used to uncover information…

5 days ago

Log Analysis Fundamentals

Introduction In cybersecurity and IT operations, logging fundamentals form the backbone of monitoring, forensics, and…

7 days ago

Networking Devices 101: Understanding Routers, Switches, Hubs, and More

What is Networking? Networking brings together devices like computers, servers, routers, and switches so they…

1 week ago

Sock Puppets in OSINT: How to Build and Use Research Accounts

Introduction In the world of Open Source Intelligence (OSINT), anonymity and operational security (OPSEC) are…

1 week ago