Thick Client Penetration Testing
Not everything is a website — plenty of business tools are programs people install straight onto their computer. Those come with their own blind spots: passwords hidden in the software itself, or an update system that'll install almost anything sent to it.
Thick client penetration testing, defined
Thick client penetration testing is static and dynamic analysis of native Windows, macOS, and Linux applications — reverse-engineering binaries to uncover insecure inter-process communication (IPC), DLL hijacking, hardcoded credentials, unsafe local storage, and unauthenticated update channels.
There's no dedicated OWASP Top 10 for desktop applications — findings map back to Top 10:2025 categories, cross-checked against the OWASP Testing Guide's desktop application chapter.
What we test
- Binary and memory analysis — reverse-engineering the compiled application for embedded secrets and logic flaws
- IPC and named pipe testing — whether inter-process communication channels can be hijacked or spoofed
- Local storage and credential audits — passwords or tokens stored insecurely on the local filesystem
- Auto-update integrity checks — whether the update mechanism verifies what it's about to install
- DLL hijacking and privilege escalation paths — local attack vectors specific to installed native applications
Mapped to OWASP Top 10:2025
No dedicated "OWASP Top 10" exists for thick client / desktop apps — findings map back to Top 10:2025 categories, cross-checked against the OWASP Testing Guide's desktop application chapter.
How ComplyArmor runs thick client penetration testing
Binary reverse-engineering combined with runtime dynamic analysis — every credential-storage or IPC finding is manually verified by actually extracting the data or hijacking the channel, not flagged from static analysis alone. Delivered as Smart PTaaS — continuous rather than a one-off engagement — and following our testing methodology: discover, scan, exploit, validate. Every finding maps to your compliance requirements.
Frequently asked questions
What is thick client penetration testing?
Static and dynamic analysis of native Windows, macOS, or Linux desktop applications — reverse-engineering the binary to uncover insecure IPC, hardcoded credentials, unsafe local storage, and unauthenticated auto-update channels.
Why do thick client applications need separate testing from web apps?
Desktop applications have their own blind spots that don't exist in web apps — locally stored credentials, inter-process communication that can be hijacked, and update mechanisms that may install almost anything sent to them.
What framework does thick client testing follow?
Findings map back to OWASP Top 10:2025 categories, cross-checked against the OWASP Testing Guide's desktop application chapter — there's no dedicated OWASP Top 10 specifically for thick clients.
Does thick client testing cover auto-update mechanisms?
Yes — auto-update integrity is one of the highest-impact areas, since an update channel that doesn't verify what it's installing is effectively a remote code execution path controlled by whoever can intercept or spoof it.