Thick client application penetration testing.
We test enterprise desktop software and two-tier or three-tier thick client applications built in .NET, Java, C/C++, and Electron for binary manipulation, memory exposure, local privilege escalation, and wire protocol flaws.
What is in scope
Key technical areas and vulnerability classes evaluated during the assessment.
Binary reverse engineering and decompilation
Analyzing .NET assemblies, Java JARs, native C/C++ executables, and Electron ASAR packages for hardcoded credentials, API keys, and proprietary logic.
Process memory and heap inspection
Inspecting live process memory during runtime to check whether cleartext passwords, encryption keys, or session tokens remain exposed in RAM.
DLL hijacking and local privilege escalation
Testing Windows services, auto-updaters, insecure file system permissions, and unquoted service paths for local SYSTEM privilege escalation.
Local storage and registry security
Auditing configuration files, local SQLite/Access databases, Windows Registry keys, and named pipes for sensitive data exposure.
Client-side control bypass
Testing whether UI restrictions, license checks, or role checks enforced solely in the desktop client can be bypassed via binary patching or memory editing.
Network and custom wire protocol testing
Intercepting and fuzzing HTTP, TCP, TLS, WCF, gRPC, or direct database connections between the desktop client and backend servers.
Testing methodology
Our step-by-step engineering workflow from reconnaissance to verified proof of concept.
1. Binary and installation footprint analysis
We inspect the installer, file system permissions, registry keys, loaded libraries, and background services created by the application.
2. Static decompilation and code review
We use tools such as dnSpy, JD-GUI, and Ghidra to analyze client-side authentication, cryptography, and update mechanisms.
3. Dynamic runtime and memory analysis
We monitor file, registry, and network activity with Process Monitor, debuggers, and custom proxies while exercising application workflows.
4. Patch and build re-verification
We retest updated installer packages and server-side fixes to confirm all identified flaws are resolved.
Deliverables and retesting
What your engineering and compliance teams receive at the conclusion of testing.
Thick client technical VAPT report
Step-by-step reproduction proofs covering binary, memory, OS-level, and network-level findings.
Engineering remediation guide
Code and build hardening recommendations for .NET, Java, C++, and Electron development teams.
Verification sign-off
Formal retest report confirming that local and server-side fixes are effective.
Scope your assessment
Contact our security team with your target details to receive a clear scoping plan.