Peneto Labs: Penetration Testing Services

Thick Client Penetration Testing

Thick client applications process sensitive data locally and interact directly with backend systems— making them a high-value target for attackers. Peneto Labs simulates real-world threats to uncover vulnerabilities in your desktop apps before they can be exploited.
  • Reverse Engineering
  • Local Storage & Memory Testing
  • Network & API Security  
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Sample Report

We Know the Hidden Risks Inside Desktop Applications

Unlike web or mobile apps, thick clients often store data on disk, use proprietary protocols, and run critical business logic on the user’s machine — increasing the attack surface.
At Peneto Labs, we’ve tested internal tools, enterprise-grade desktop software, and hybrid desktop-cloud apps across industries like finance, healthcare, and manufacturing. Our experts hold advanced certifications like OSCE, GXPN, OSCP, and GCIH, and specialize in reverse engineering, protocol fuzzing, and memory-level exploitation.

CERT-In Empanelled

Manual Analysis + Exploit PoCs

Expert-Led Security Testing

Binary-Level Exploitation

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What’s at Risk Without Thick Client Application Testing?

  • Reverse-engineered business logic
  • Credential theft from local storage
  • Broken authentication or local bypass
  • Access to internal APIs or databases
  • IP theft through unpacked binaries
  • Unsecured communication over the network
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What We Test in Your Thick Client App

All items below are covered using manual techniques and runtime analysis, aligned with best practices

Reverse Engineering Binaries

Local Authentication Bypass

Insecure File & DB Storage

Network Traffic Inspection

Custom Protocol Exploitation

Input Validation & Crashes

API Calls & Tokens Analysis

Privilege Escalation Checks

Registry, Memory, and DLL Review

Testing is conducted on both staging and live environments. Our testers think like real attackers— chaining vulnerabilities, exploring hidden paths, and testing what automated tools ignore.
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Process

Our Thick Client Testing Process

01

Discovery & Scoping

We align testing scope with your business context—focusing on workflows, user roles, data sensitivity, and potential impact across critical systems & operations.

02

Manual Pentesting

Our team performs deep reverse engineering, network interception, runtime tampering, and logic flaw exploitation on Windows, Linux, or hybrid applications.

03

Reporting & Remediation

You get a detailed technical report with PoCs and step-by-step remediation guidance. After fixes, we retest and issue a CERT-In compliant audit certificate.

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What You’ll Receive

We go far beyond basic static scans. Our thick client application testing simulates real-world attacker techniques — including reverse engineering, memory analysis, and client-server abuse — to uncover binary-level flaws, insecure storage, and logic issues often missed by automated tools.

  • Executive Summary for Stakeholders 
  • Technical Report with Risk Ratings 
  • Fix Guidance for Engineering Teams 
  • Proof-of-Concept Demonstrations 
  • Free Re-Testing 
  • CERT-In Compliant Security Certificate 
  • Compliance Mapping (ISO, PCI, RBI, GDPR)
Download Sample Report

Client Testimonials

Some words from our clients

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We recently partnered with Peneto Labs

to conduct vulnerability and penetration testing on our IT infrastructure, and we couldn't be more satisfied with the experience. From beginning to end, their team showed outstanding expertise and professionalism. They delivered a comprehensive report filled with actionable recommendations and provided multiple solution walkthroughs. Their guidance was instrumental in resolving issues, ultimately helping us obtain an audit certificate. This certificate was crucial for achieving compliance with our client. We highly recommend Peneto Labs penetration testing services.

CEO

Anniyam Payment

We can say with confidence

that Peneto Labs are a team of highly skilled and dedicated professionals who have always provided excellent and prompt IT security auditing services which helped us to closing the security gaps in our organisation and prevent compromise.

Dokonally

We’ve been working with Pentolabs

for our VAPT needs and we are happier with their services. They’re professional, efficient and have helped us improve our security posture of the application & infrastructure significantly. Their source code reviews are especially helpful in identifying vulnerabilities. Highly recommended.

Technical Architect

Axlerate Futuretech

The Phishing email services

offered by Pentolabs have been excellent which is an essential part of Cyber Security awareness which was very effective to understand for the security managers on how people react to such emails. I personally recommend it to anybody who wants to increase their Cyber threat awareness. An Ideal and a must for all employees in the organization. Thank you Pentolabs

Senior Manager - Cyber Security & BCP

National Commodity Clearing Limited

We have been conducting security assessments

for the 14 years. However, Peneto Labs expertise, Methodology, and reporting are world class. No reports from our past vendors match their quality & skills. They have done a wonderful job.

Manager

IT. String Information Services

The team at Peneto Labs are highly trained

, extremely knowledgeable, professionals who have assisted us in the successful installation of our firewall. Peneto Labs is an amazing company who has always been a fantastic support for our business. They are fast, reliable, friendly and helpful, and always available in case of an emergency. The staff are really experienced and we would not hesitate to recommend them highly to any business

I.T Head

Expertus
Geojit (1)
federal-bank (1)
aditya-birla-capital (1)
karur-vysya-bank (1)
dhanlaxmi-bank (1)
axis-finance (1)
m2p-fintech
photon
manappuram
latentview
hexagon
ncdex

Don’t Let Local
Software Be the Weakest Link

Attackers love local targets. Peneto Labs helps you lock down your
thick client applications before those vulnerabilities are used against you.
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Frequently Asked Questions

Thick client penetration testing is the process of assessing the security of desktop-based applications that run on a client machine and communicate with a server. These applications often store or process sensitive data locally, which can be targeted by attackers. 

Testing helps identify risks like insecure local storage, weak encryption, hardcoded credentials, and unsafe communication channels. It’s important to ensure these apps don’t expose your business to internal or external threats.

Thick client apps can suffer from a range of security flaws including insecure authentication, buffer overflows, privilege escalation, improper input validation, weak encryption, hardcoded credentials, and unsafe API calls. 

Attackers can exploit these weaknesses to gain unauthorized access, extract sensitive data, or control the system. Peneto Labs tests for these risks using a combination of static and dynamic analysis methods.

Unlike web applications, thick client apps run on a local machine and interact directly with system files, memory, and hardware. Testing them involves deeper analysis of the underlying code, local storage, memory usage, and client-server communication. At Peneto Labs, we use both reverse engineering and runtime testing techniques to simulate real-world attack scenarios specific to thick client environments.

Peneto Labs follows a comprehensive and standards-based approach that includes reconnaissance, static code analysis, dynamic testing, and reverse engineering. 

We analyze how the application handles authentication, encryption, user input, and server interactions. Our methodology aligns with industry standards such as OWASP Testing Guide and PTES to ensure a complete security evaluation.

Our testing process is carefully designed to avoid any disruption to your production environment. Whenever possible, we recommend testing in a staging or development environment. 

If testing must be done on a live system, we work closely with your team to avoid data loss, service downtime, or performance issues. All actions are logged and performed in a controlled, non-destructive manner.

We can test thick client applications built on a variety of platforms including Java, .NET, C++, Electron, Delphi, and more. Whether your app runs on Windows, macOS, or Linux, our team tailors the testing approach based on the technology stack, architecture, and security goals. We also assess how the application interacts with APIs, local databases, and backend servers.

Thick client apps should be tested at least once a year or after major updates, code changes, or integrations. Frequent testing helps identify new vulnerabilities introduced during development or configuration changes. If your application processes sensitive or regulated data, regular testing is also essential for maintaining compliance with security standards.

Yes, many regulatory standards such as PCI DSS, ISO 27001, and HIPAA require security testing of all software handling sensitive data, including thick client apps. In India, aligning with CERT-In guidelines is also encouraged for cybersecurity readiness. Regular testing not only supports compliance but also demonstrates your organization’s commitment to securing client-side applications.

Thick client application pentesting is priced based on the technology stack, number of client-server interactions, use of encryption, and backend system complexity. Since reverse engineering and binary analysis are often involved, the cost may be higher than web or mobile tests. Peneto Labs provides a detailed quote after an initial technical scoping.