--- source_url: "https://github.com/CyberSecurityUP/Desktop-App-PenTest-Checklist" title: GitHub - JoasASantos/Desktop-App-PenTest-Checklist ยท GitHub mirrored_at: 2026-08-12T15:38:11.764Z host: github.com cited_in_42a: true mirror_canonical: "https://index.42a.ai/github.com/CyberSecurityUP/Desktop-App-PenTest-Checklist" --- > **Original source:** https://github.com/CyberSecurityUP/Desktop-App-PenTest-Checklist #### **1\. Initial Reconnaissance** - Identify the target operating system (Windows, macOS, Linux). - Identify the application architecture (32/64-bit). - Identify the programming language used (e.g., C++, .NET, Java). - List external dependencies (DLLs, libraries, frameworks). - Verify permissions and privileges required for execution. - Inspect public documentation (user manuals, help files, changelogs). - Identify prior versions and known vulnerabilities (CVEs). #### **2\. Reverse Engineering** ##### **Static Analysis** - Extract and analyze the main binary. - Identify sensitive strings (passwords, APIs, tokens) using **strings** or **Binwalk**. - Identify dependencies with tools like **Dependency Walker** or **Ghidra**. - Review compilation settings (enabled/disabled protections such as ASLR, DEP, SafeSEH). - Decompile binaries using tools like **IDA Pro**, **Ghidra**, or **dnSpy** (.NET). - Extract and analyze embedded resources (icons, images, scripts). - Identify critical functions: authentication, access control, encryption. ##### **Dynamic Analysis** - Debug the application at runtime using tools like **x64dbg**, **WinDbg**, or **OllyDbg**. - Observe control flows (critical functions, loops, system calls). - Monitor network traffic with **Wireshark** or **Fiddler**. - Map runtime events (file access, memory usage, registry keys). #### **3\. Vulnerability Testing** ##### **Input Validation** - Test input fields with long strings to identify buffer overflow vulnerabilities. - Check how the application handles unexpected inputs (e.g., special characters, invalid encodings). - Perform fuzzing on input fields using tools like **Peach** or **AFL**. - Test for command injection in fields interacting with system commands. - Test for SQL Injection in forms or embedded database queries. ##### **File Handling** - Verify if the application validates file names (path traversal). - Test creating malicious files in monitored directories. - Modify configuration files and observe behavior changes. - Test corrupted or malformed files. ##### **Memory Security** - Inspect sensitive data stored in memory (passwords, API keys). - Use tools like **Mimikatz** or **Volatility** for memory analysis. - Verify protection against buffer overflow (stack canaries, DEP, ASLR). ##### **Authentication and Authorization** - Check if credentials are stored locally. - Verify session persistence mechanisms (cookies, tokens). - Attempt to bypass authentication checks using reverse engineering. - Test privilege escalation locally. #### **4\. Network and Communication** - Capture traffic generated by the application with **Wireshark** or **tcpdump**. - Inspect API or remote service communication with **Burp Suite**. - Verify encrypted communication (TLS, SSL). - Test for sensitive data interception via reverse proxy. - Identify hidden endpoints and exposed routes. #### **5\. Security Bypass** - Test for anti-debugging mechanisms. - Bypass signed DLL validation checks. - Verify code obfuscation and attempt to deobfuscate. - Inspect and disable checksum verifications in binaries. #### **6\. Persistence** - Analyze temporary files and logs created by the application. - Verify registry key usage for storing data on Windows. - Identify sensitive data in local or persistent storage. #### **7\. Privilege Escalation** - Test application behavior when run as an administrator. - Verify file and directory permissions used by the application. - Exploit misconfigurations, such as writable files in protected directories. - Test malicious DLL/process injection. #### **8\. Advanced Exploitation** - Create custom payloads to exploit identified vulnerabilities. - Inject shellcode into application memory. - Explore malicious DLL injection techniques. - Investigate interdependent processes with **ProcMon** and **Process Explorer**. #### **9\. System Protections** - Verify ASLR, DEP, and other protections in the executable. - Test the effectiveness of digital signatures and integrity checks. - Identify sandboxing or security containerization mechanisms. ## Windows API for Desktop Application Pentesting ### 1\. Interception and Manipulation of Input and Output #### Relevant APIs - `ReadProcessMemory` and `WriteProcessMemory`: To read or modify data directly in the application's memory. - `SetWindowsHookEx`: To intercept keyboard or mouse inputs. #### Example Usage - Use `SetWindowsHookEx` to capture keyboard events and simulate interactions with the application. - Use `ReadProcessMemory` to access data in memory, such as authentication information or sensitive data. * * * ### 2\. Automating Interactions with the Application #### Relevant APIs - `SendMessage` and `PostMessage`: To send events to the application's interface. - `FindWindow` and `FindWindowEx`: To locate specific windows or controls. - `EnumWindows`: To enumerate all open windows and locate the target application. #### Example Usage - Use `FindWindow` to identify the application's main window. - Send events using `SendMessage` to fill out login fields and submit the form automatically. * * * ### 3\. Process Manipulation #### Relevant APIs - `CreateToolhelp32Snapshot`, `Process32First`, and `Process32Next`: To enumerate running processes. - `OpenProcess`: To open a process with specific permissions. - `TerminateProcess`: To terminate processes. #### Example Usage - Enumerate running processes to locate processes related to the application. - Use `OpenProcess` to access information or inject code into the application's process. * * * ### 4\. Reverse Engineering #### Relevant APIs - `VirtualProtectEx`: To modify memory permissions, allowing changes to executing code. - `CreateRemoteThread`: To inject threads into the application's processes. - `LoadLibrary`: To remotely load custom DLLs. #### Example Usage - Inject a custom DLL into the application to intercept critical functions. - Use `VirtualProtectEx` to alter memory protection and modify the behavior of sensitive functions. * * * ### 5\. Resource Monitoring #### Relevant APIs - `GetFileAttributes` and `ReadFile`: To access and monitor files used by the application. - `RegOpenKeyEx` and `RegQueryValueEx`: To inspect registry keys used by the application. #### Example Usage - Monitor configuration files or logs generated by the application to identify security flaws. - Examine the Windows registry for configuration or credential information. * * * ### 6\. Vulnerability Detection #### Relevant APIs - `HeapWalk` and `HeapAlloc`: To interact with the application's heap. - `DeviceIoControl`: To interact with drivers and check if the application makes insecure device calls. #### Example Usage - Explore memory allocation flaws (e.g., buffer overflows). - Test device control functions to identify improper permissions. * * * ### 7\. Debugging Instrumentation #### Relevant APIs - `DebugActiveProcess` and `DebugActiveProcessStop`: To attach a debugger to the application. - `WaitForDebugEvent`: To capture events generated by the application during runtime. #### Example Usage - Use a debugger to inspect the application's execution flow in real-time. - Identify critical parts of the code that can be exploited. * * * ### Tools and Recommended Languages #### Languages - **C/C++**: For direct access to Windows APIs. - **Python**: Using libraries like `ctypes` or `pywin32`. #### Tools - **x64dbg** or **OllyDbg**: For debugging and memory analysis. - **Process Monitor** and **Process Explorer**: For monitoring processes and system events.