#debug #cross-platform #debugger #debugging #reverse-engineering #memory-hacking #utility-library #hacking #memory #binary

nightly bin+lib udbg

cross-platform library for binary debugging and memory hacking

1 unstable release

Uses new Rust 2021

0.2.1 May 2, 2022
0.2.0 Apr 10, 2022
0.1.0 Mar 20, 2022

#7 in #utility-library

MIT license

15K SLoC


crates.io docs.rs

Cross-platform library for binary debugging and memory hacking written in Rust.

  • 👍 Cross-platform: udbg wraps the details of different interfaces on different platform, and provides uniform interfaces
  • 👍 Multiple-target: you can control multiple debug target in most cases
  • 👍 Non-invasive: you can only view the information of target, instead of attaching to it
  • 👍 Various target types: In addition to process, target can be a minidump, a PE file, even be the OS-Kernel space with extra extension.

API Overview

There are two main kinds of interfaces in udbg, target information and debugging interfaces.

Interaces of target information, which abstracted as the UDbgTarget trait, represents an observable debugging target, it is an active process in most cases, also it can be a minidump, a PE file, even be the OS-Kernel space with extra extension.

UDbgTarget contains these functions, memory operation (read/write/enumeration), module enumeration, thread enumeration, handle/FDs enumeration, etc. Based on these functions, we can implement some utililties over the different types of target, such as module dump, memory search, hook scanning, malicious code scanning, etc.

Debugging interfaces, which abstracted as the UDbgEngine trait, mainly provides the ability of process control. There is a default implementation, typically it wraps the Debugging Functions on Windows, and wraps the ptrace interfaces on Linux.

Most of above interfaces were designed to be dynamic objects, which is for script-binding friendly, and udbg provides lua bindings defaultly.

Current status of target information interfaces

Platform/Target Memory operation Memory List Thread Module/Symbol Handle/FD List
Windows Process ✔️ ✔️ ✔️ ✔️ ✔️
Linux Process ✔️ ✔️ ✔️ ✔️ ✔️
MacOs Process ✔️ ✔️ ✔️ ✔️ ✔️
Minidump ✔️ (readonly) ✔️ ✔️ ✔️ 🚧
PE File ✔️ (readonly) ✔️ - - -

Current status of debugging interfaces

Platform/Target Debug Symbol Breakpoint Watchpoint(HWBP) Multiple Target
Windows(x86/x64) ✔️ (pdb) ✔️ ✔️ ✔️
Windows(aarch64) ✔️ (pdb) ✔️ ✔️ ✔️
Linux(x86_64) ✔️ (elf) ✔️ ✔️ ✔️
Linux(aarch64) ✔️ (elf) ✔️ ✔️ ✔️


  • Cross-platform interfaces to get target information, see src/test.rs fn target
  • Write a basic debugger, see src/test.rs fn test_debug


~1.5M SLoC