AishiSec Services
Thick Client Security Testing
Could your desktop application be bypassed or abused?
Desktop applications are tested far less than websites, which is exactly why attackers look at them. A thick client holds logic, credentials and trust decisions on a machine the business does not control.
We test how the application talks to its server, what it stores locally, and what an attacker can learn or change by holding the installed software.
What we test
Traffic: what the app sends, whether it can be intercepted, replayed or modified
Local storage: files, registry entries and cached data on the installed machine
Authentication: client-side checks that can be bypassed, and what the server actually verifies
Licensing and update mechanisms: whether protections can be circumvented
Binary analysis: what decompilation reveals about logic and secrets
How we test it
We agree the scope first: what to test, when, and what is off limits.
Testing combines manual work with automated tools and AI assisted analysis.
Every finding is verified by hand, with evidence captured for your team.
The weaknesses that matter
These are the kinds of findings this assessment is built to catch, each explained the way it would appear in your report.
CWE-602
Trusting the client
The app checks a password locally while the server trusts whatever the client sends, the check is decoration, not security.
CWE-319
Interceptable traffic
Sensitive data travels unencrypted, so anyone on the same network can read or alter it.
CWE-798
Hardcoded credentials
A database password or service key lives inside the installed binary, available to anyone who downloads it.
CWE-494
Unsigned or unverified updates
Updates download without a check that they genuinely came from you. An attacker who can reach the update channel can replace the installer, and every machine that updates runs their code.
CWE-922
Insecure local storage
Customer data, passwords or tokens stored in plain-text files and registry entries on every machine the software is installed on, including laptops that get lost or stolen.
What you receive
Executive summary written for decision-makers
Findings with severity, business impact and evidence
Practical remediation guidance for your team
Retest results after fixes are applied
When to perform it
Before rollout, after significant changes, and before renewing any desktop software that your customers rely on.
Who it's for
Businesses running desktop software (ERPs, point-of-sale systems, banking tools and internal utilities), and the vendors who build them.
Common questions
Know where your security stands.
Tell us what you're building, operating or protecting. We'll help you determine where security testing should start.