01
Netanix CTF
team finish · 2026
Operator profile // KTM.NP
Hack to Learn, Learn to Defend
I’m d4rk.c1ph3r — a cybersecurity student, CTF player, and security-focused developer turning lab work into practical tools.
04
Hackastra Finals
national finish · 2026
03
PTNxOWASP CTF
100+ competitors · 2026
76%
Module Average
Coventry University
01
Mission profile
The person behind the handle
Curiosity, converted into evidence.
Mahendra Nath is a BSc (Hons) Ethical Hacking and Cybersecurity student at Coventry University, delivered through Softwarica College in Kathmandu.
Under the alias d4rk.c1ph3r, I compete with Sudo_Siblings, build security-focused software in Python and C, and publish practical write-ups from authorized labs. My strongest pull is toward digital forensics, OSINT, cryptography, and the systems work beneath secure applications.
Kathmandu, Nepal
BSc (Hons) · 2025—present
Available for internships & junior roles
02
Selected operations
Build log // public repositories
Security work with the covers off.
OPS-01Security engineering
Cyber Dashboard
A private workspace for managing security learning, labs, findings, notes, tasks, and privacy-aware administration.
14 blueprints · 72 routes · 20 application tables
PythonFlaskMySQLDocker
- TOTP MFA
- RBAC
- Audit logs
- Secure exports
SYS-02Systems security
Linux Auth + Sandbox
Two C programs exploring privilege-separated authentication and supervision of complete Linux process trees.
SO_PEERCRED · seccomp · Landlock · cgroup-aware
CLinuxPOSIXIPC
- Privilege drop
- Peer identity
- Resource limits
- Isolation
BLU-03Detection research
State-based IDS
A finite-state detection model that maps user behavior into security states and raises risk as signals compound.
5 states · dynamic risk scoring · traffic simulation
PythonFSMDockerLogging
- Brute-force signals
- Geo anomalies
- Privilege events
LAB-04Authorized lab tooling
Reverse Shell Model
An educational client-server implementation for studying sockets, command processing, retries, and process control.
Standard library · persistent connection · cross-platform
PythonSocketsTCPSubprocess
- Lab-only scope
- Error recovery
- Connection handling
03
Capability matrix
Primary CTF disciplines
Choose a signal.
ACTIVE_CHANNEL
SIG/FORENSICS
Forensics
Following artifacts, timelines, and metadata until a noisy incident becomes a defensible story.
LEARNING DEPTH88/100
Artifact analysisTimeline reasoningLog reviewSteganography
Self-assessed focus signal — not a certification score.
04
Training telemetry
TryHackMe // public profile
Proof of consistent practice.
A public record of hands-on learning across rooms, streaks, rankings, and earned achievements.
View @D4rkC1ph3rWorld rank#10,526
Global tierTop 1%
Rooms owned301
Badges36
Current streak194d
Total points34,265
Capability signal66/100
Latest earned badges
Soc Apprentice
Earned Sep 05, 2026
180 Day Streak
Earned Aug 22, 2026
No Scope
Earned Aug 07, 2026
Silver League
Earned Aug 03, 2026
Authentication Striker
Earned Jul 31, 2026
Soc Sim Five Scenarios Completed
Earned Jun 13, 2026
05
Competitive record
Team // Sudo_Siblings
Pressure tested.
National & community competitions
RankOperationAfter-action note
Pentester Nepal 13th Anniversary CTF
PTNxOWASP · August 2026
Sudo_Siblings placed third in an onsite field of more than 100 participants from across Nepal.
Hackastra CTF National Finals
Ethical HCK Community · 2026
Qualified in fifth position, advanced with Sudo_Siblings, and finished fourth in the national final.
Netanix CTF
Team Sudo_Siblings · April 2026
Won the competition across web, cryptography, forensics, reverse engineering, and pwn challenges.
06
Technical writing
Published on Medium
Field notes from the lab.
FIELD NOTE 03FIELD NOTE 02FIELD NOTE 01
TryHackMe CryptoCabana Write up| Hacker Holiday Day 9
Aug 04, 2026 · tryhackme · cloud-security
TryHackMe Write-up: Cache Me Outside
Jun 11, 2026 · tryhackme-walkthrough · ethical-hacking
Cryptography Concepts | TryHackMe |Easy Walkthrough (Secret Message Rescue Game)
Feb 18, 2026 · tryhackme-writeup · cybersecurity
07
Academic base
Current study
BSc (Hons) Ethical Hacking
and Cybersecurity
Coventry University · delivered at Softwarica College of IT & E-Commerce
RELEASED MODULE AVG.76%
Selected marks include Programming 85%, Internet & Web Technologies 83%, and Operating Systems 80%.
08
Secure channel
Open to internships, junior roles & CTF collaboration
Have a mission in mind?
Send the brief. If the fit is right, I’ll return with questions, scope, and a clear next step.