# Thick-Client App Security

> Desktop & thick-client application penetration testing.

Desktop and thick-client applications often hide insecure storage, weak IPC, broken auth and exposed business logic. We test Windows, macOS and Java/.NET thick clients - static, dynamic and at the network layer.

## Outcomes

- Static and dynamic analysis of the client
- Insecure storage, IPC and registry findings
- Network and API traffic interception
- Business-logic and auth bypass testing

## Process

01. **Recon** - Map architecture, endpoints and data flows.
02. **Analyze** - Reverse engineering and static analysis.
03. **Exploit** - Dynamic testing, tampering and traffic attacks.
04. **Report** - Findings with PoCs and remediation.

## Deliverables

- Thick-client security report
- Risk-rated findings with PoCs
- Remediation guidance

## Standards

OWASP, PTES


## Overview

Thick client and desktop applications often bypass traditional firewalls, exposing business logic, insecure local files, and database connections directly on user machines.

We test Windows, macOS, and Java/Electron desktop applications, combining binary reverse engineering with dynamic execution and local filesystem analysis.


## What we cover

### Binary Obfuscation
Evaluating code de-compilation protections, anti-debugging, and memory tampering controls.

### Local Data Auditing
Checking the local filesystem, registry, and application cache for sensitive credentials.

### IPC & Communication
Probing Inter-Process Communication channels, named pipes, and local TCP ports for hijack avenues.

### API Traffic Tampering
Intercepting and modifying traffic between the desktop client and backend API endpoints.


## FAQ

**Which platforms?**
Windows, macOS and Linux desktop apps, including Java, .NET and Electron clients.

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