01CTF Writeups
02Works
Public beta · v2.1 · ASEAN · APAC · Global
CyberGuard — cybersecurity training that feels like a game
✓ cyberguard.ivanthan.ukPlay through 100+ real scams from 13 countries. Five adaptive skill tiers — from password basics to APT defense. Built for everyone from kids to security professionals.
Pick your skill tier — Kids, Teens, Adults, Seniors, or Expert — and play through missions built from actual scams circulating right now. Scenarios match your context (gamers get gaming scams, grandparents get pension cons, security pros get APT incidents), so the lessons stick. Earn XP, unlock badges, climb the global leaderboard.
No credit card. No tracking. 30-second start.
CTF Writeups & VAPT Portfolio
✓ 4 rooms · 13 findingsCurated CTF archive organised by primary skill. Each engagement ships five docs: README, writeup, beginner walkthrough, formal VAPT with CVSS 3.1 + MITRE ATT&CK, Q&A cheatsheet.
→ github.com/r3b3Lli0uskIDProxmox / Kali / n8n Lab
✓ Self-hosted · always onDell OptiPlex running Proxmox with Kali VM for pentest and malware analysis. n8n automation via Docker + Cloudflare Tunnel for secure remote access.
→ ongoing
Training · Jan 2026
Corelan Heap Masterclass — Exploit Development
✓ CompletedProfessional heap-exploitation training: heap overflow, use-after-free, heap spray, Windows binary exploitation with WinDbg. Delivered under the REDFACE Research Programme.
→ verify credentialHealthcare IT Infrastructure
✓ SingHealth · MINDEF · ParkwayWindows Server 2008/2012/2019 (hardware + Hyper-V) for DICOM imaging. X-Ray, DR, CR, Ultrasound system deployments across Myanmar. Nessus scanning, OS hardening, PHI/HIPAA compliance.
→ career timeline below03Journey
Imaging IT Specialist
Parkway Hospitals Singapore
Managed critical radiology imaging infrastructure (Vue RIS/PACS, Infinitt CPACS) at 99% uptime. Supported secure rollout of clinical AI: Sensecare, Annalise, Teamplay. Authn/authz for 200+ radiology staff. DICOM transmission anomaly monitoring; patch management & vulnerability remediation.
IT Specialist (RIS/PACS) — ASEAN
Philips Enterprise Diagnostic Informatics — APAC
Mission-critical healthcare IT for tier-1 clients: SingHealth and Singapore MINDEF. Nessus vulnerability scans and Windows OS hardening for RIS/PACS servers. Root-cause analysis for complex imaging system failures.
IT Executive (RIS/PACS) — ASEAN
Carestream Health Singapore
RIS/PACS installation, L1/L2 support, and UAT management for radiology imaging systems.
Project Manager & Senior Service Engineer
Biz-Partner Group — Myanmar
Led healthcare IT deployments from kick-off through client acceptance. Medical imaging equipment (DR, CR, X-Ray, Ultrasound) with EMR/PACS integration.
04Certifications
Certified Ethical Hacker v13 (CEH)
Professional Certificate in Cybersecurity