About CYBER DT — Darshitha Theekshana, White Hat Ethical Hacker in Sri Lanka

I am Darshitha Theekshana, operating as CYBER DT. I am a white hat ethical hacker and cyber security specialist based in Sri Lanka, working across penetration testing, malware analysis, mobile device recovery and system hardening.

Operator profile

Over the years I have worked across the full tech ecosystem — running authorized penetration tests, dissecting malware, rescuing infected smartphones, and hardening desktops and servers so they stay secure under real-world pressure. I do not just fix symptoms; I trace root causes and rebuild defences that last.

Beyond client work I share what I know on my YouTube channel @dtcybersl1 — tutorials, tool breakdowns and practical security tips for everyday users. Every system I touch follows one rule: stay legal, stay ethical, stay protected.

Core expertise

Three pillars make up the CYBER DT practice.

• White hat penetration testing — authorized attack simulations, vulnerability assessment and remediation reporting
• Mobile OS security (Android / iOS) — diagnostics, spyware and stalkerware removal, OS hardening and app auditing
• Desktop and server management — Windows and Linux hardening, firewall and intrusion prevention setup, backup and recovery planning

Capability matrix

Ethical hacking and penetration testing sit at the core of the work, supported by strong mobile OS security, deep desktop and server hardening experience and hands-on malware analysis and digital forensics.

• Ethical hacking and penetration testing
• Mobile OS security — Android and iOS
• Desktop and server hardening
• Malware analysis and digital forensics