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Project Aims to Create Smallest Possible Complete Windows Application in x86 Assembly

🔄 Updated 1h ago
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Key points

  • Project aims for smallest uncompressed Windows app in x86 assembly.
  • Application must include a message loop, title bar, and system menu.
  • Optimizations can trigger antivirus warnings due to aggressive tactics.
  • Code repository includes multiple optimized versions.

Project Goal: Minimal Windows Application

The "HelloAssembly" project focuses on creating the smallest possible complete Windows application using x86 assembly language. The primary objective is to achieve minimal executable size without employing compression techniques, while still ensuring the application functions as a standard Windows program.

Required Features and Functionality

The target application must incorporate several key Windows features. These include a functional Windows message loop, a title bar, and working minimize, maximize, and close buttons. Additionally, it must have a system menu and be capable of painting a background with centered text, such as "Dave's Tiny App".

Optimization Techniques and Repository Structure

The project's code repository contains various optimized versions, including an optimized original, a version using shell coding tactics, and another with a manually written PE header. These different approaches explore various methods to reduce the executable size. The project emphasizes code readability and includes comments to explain the techniques used.

Antivirus Flagging Concerns

The aggressive optimization strategies employed, particularly those in the "Lasse" directory and those used by tools like Crinkler, can resemble tactics used by malware. Consequently, antivirus software may flag the executables built from this source code as suspected malware, potentially preventing them from running or quarantining them. Users are advised to exercise caution and understand the risks if they choose to temporarily disable their antivirus to test the applications.

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Reporting from

A project called "HelloAssembly" is developing the smallest possible complete Windows application written in x86 assembly, focusing on minimal size without compression while retaining standard window features. This initiative explores extreme code optimization techniques, which may cause antivirus software to flag the resulting executables.