Sivatharan Sekar

Operator Profile

Security operator with builder instincts.

Execution brief

I started as an independent security operator and grew into consulting, VAPT, exploit research, and structured mentorship. My work sits between low-level curiosity and practical delivery: binary analysis, memory behavior, enterprise risk checks, and repeatable training environments.

Current base: M.Sc. Cybersecurity and Digital Forensics at Rashtriya Raksha University, Lucknow. Current work mode: deep technical practice, Brownman Theory training pipelines, and custom C/Python security utilities.

Services

Security services I can provide.

AD

Active Directory Attack Simulation

Internal AD security validation for controlled enterprise scopes, focused on misconfiguration discovery and remediation clarity.

Domain enumeration and attack-path mapping
Privilege escalation risk review
Kerberos, delegation, and lateral-movement checks

WA

Web Application VAPT

Manual and tool-assisted web testing for real applications, with findings written in a way developers can fix quickly.

Authentication and access-control testing
OWASP-style vulnerability review
Proof, impact, and remediation notes

NW

Network and Server Assessment

External and internal infrastructure review for exposed services, weak configurations, and hardening opportunities.

Port, service, and firewall review
Linux and Windows server checks
Risk-ranked reporting

SO

SOC Operations

Alert triage and defensive operations support for teams that need stronger detection, response, and documentation flow.

SIEM alert review and case notes
IOC enrichment and escalation logic
Playbook and detection improvement

IR

Incident Response and DFIR

Digital forensics support for evidence collection, timeline reconstruction, malware indicators, and post-incident learning.

Memory and filesystem artifact review
Timeline and IOC mapping
Executive and technical summaries

PW

Password Audit and Cracking Labs

Authorized password-security review and lab-based cracking practice for policy improvement, training, and defensive maturity.

Password policy and lockout review
Hash exposure and cracking-risk explanation
MFA and account-hardening guidance

CT

CTF Creator and CTFd Operator

Challenge design, platform setup, and scoreboard operations for colleges, communities, workshops, and private training programs.

Web, crypto, forensics, OSINT, and pwn-style labs
CTFd deployment, challenge upload, and scoring
Writeups, hints, flags, and event support

TR

Security Training and Mentorship

Practical training built from real security workflows, with labs that teach students how to think and report properly.

VAPT and red-team fundamentals
CTF-to-real-world translation
Student progress and lab review

TL

Custom Security Tools

Small C, Python, Bash, and JavaScript utilities for repeatable checks, parsing, reporting, and lab automation.

Recon and reporting helpers
Forensic parsers and dashboards
Automation for repeatable workflows

Operational Metrics

Numbers that show the grind.

H

0+

Tactical immersion

Four years of continuous skill building across exploit labs, VAPT, forensics, scripting, and training delivery.

D

0h

Daily deep work

Non-negotiable focused sessions for binary analysis, reverse engineering, CTF creation, tooling, and exam preparation.

M

0+

Operators trained

Best Mentor at Brownman Theory, building hands-on labs and translating complex techniques into clear learning paths.

T

0

Target year

CEH Practical and HTB CPTS are structured as short-term certification checkpoints for international readiness.

Four-Year Evolution

From independent practice to structured security leadership.

Year 4 - Present

M.Sc. Cybersecurity and Digital Forensics

Rashtriya Raksha University, Lucknow

Formalizing field experience through academic work in operating systems, filesystem forensics, incident workflows, evidence handling, and advanced security architecture.

Preparing for CEH Practical and HTB CPTS by December 2026.
Building custom utilities including PyDF and MemHunter for lab-driven research.
Sharpening report writing, evidence mapping, and practical defense narratives.

Year 3 - 4

Cybersecurity Consultant

XF Vision, Coimbatore

Moved into infrastructure-focused security review: mapping exposure, validating controls, and communicating risk in a way business and engineering teams can act on.

Security architecture mapping and perimeter hardening support.
Risk review cycles for corporate infrastructure and operational systems.
Practical recommendations with clear remediation priorities.

Year 2 - 4

Cybersecurity Trainer and VAPT Intern

Brownman Theory

Built credibility through teaching and hands-on assessment. Designed learning paths, ran labs, supported assessments, and earned Best Mentor recognition.

Created real-world attack simulation flows for ethical hacking tracks.
Mentored 100+ students through practical security concepts.
Balanced vulnerability assessment work with curriculum structure.

Year 1 - 4

Freelance Security Operator and Exploit Developer

Independent Practice

The foundation phase: scripting, recon, asset checks, exploit research, and repeatable technical practice. This is where the 10,000-hour discipline started.

Wrote Python and C utilities for controlled security labs.
Practiced low-level debugging, memory behavior, and reverse engineering.
Learned to turn messy findings into usable technical reports.

Visual Stack

Image panels for a stronger first impression.

Network telemetry Recon maps, asset visibility, and signal routing.

Memory research Debugger practice, runtime behavior, and lab analysis.

Forensic workflow Evidence handling, timeline review, and report structure.

Mentor lab Hands-on modules for students and junior operators.

Portfolio

Projects presented like real security products.

Forensics / Automation

PyDF Framework

Python-first digital forensics engine concept for parsing artifacts, organizing evidence, and producing repeatable investigation outputs.

Python SQLite Evidence Flow

Runtime Analysis

MemHunter

Controlled lab utility concept for studying process memory, suspicious regions, and runtime behavior during defensive research.

Python YARA Memory

Offensive / Automation

Red Team Workflow Kit

Reusable authorized-lab workflow templates for recon notes, assessment checklists, reporting, and post-test remediation tracking.

Bash Python Reports

Training / Labs

Mentor Attack Simulations

Scenario-based ethical hacking modules that help students understand evidence, scope, exploitation paths, and responsible reporting.

Curriculum VAPT Labs

CTF / Training

CTFd Event Stack

Challenge-building and CTFd operations package for workshops: categories, flags, hints, writeups, scoreboard flow, and post-event review.

CTFd Docker Challenges

Tools

Tools I can prove through practical service work.

Active Directory

Used for authorized enterprise lab validation, attack-path discovery, identity risk review, and defensive hardening discussions.

BloodHound
SharpHound
Impacket
NetExec
Kerbrute
Responder

Web and VAPT

Used for web application testing, service discovery, proxy-based manual review, and clear vulnerability reporting.

Burp Suite
Nmap
FFUF
Nuclei
SQLMap
OWASP ZAP

SOC Operations

Used for alert investigation, IOC enrichment, detection tuning, log review, and repeatable analyst workflows.

Splunk
Wazuh
Elastic
Sysmon
Sigma
YARA

DFIR and Reverse

Used for evidence review, malware triage, memory analysis, low-level debugging, and incident reconstruction.

Volatility
Autopsy
Ghidra
GDB
WinDbg
Wireshark

CTF and Password Audit

Used for CTF challenge creation, CTFd event operations, authorized password audit labs, and student practice environments.

CTFd
Docker
Hashcat
John
CyberChef
Python

Deliverables Executive summary, technical findings, screenshots, risk ranking, and remediation steps.

Evidence Reproducible proof, timestamps, affected assets, and defensive validation notes.

Operations Ticket-ready SOC notes, IOC enrichment, escalation logic, and playbook suggestions.

Training CTF challenges, CTFd setup, practical labs, walkthroughs, student review, and mentor-style correction.

Tactical Arsenal

Capability matrix with moving signal.

Primary domains

Balanced offensive, defensive, and teaching experience, with a special focus on low-level behavior and custom security tooling.

Exploit development92%

VAPT execution88%

Digital forensics82%

Mentorship95%

Tools and stack

Technologies and environments used for research, labs, tooling, and practical security assessment.

Pythonautomation, parsers, tooling

Cmemory, low-level practice

JavaScriptdashboards and UI

GDBdebugging workflows

WinDbgWindows analysis

Ghidrareverse engineering

Linuxoperations and labs

Windowsendpoint research

Bashworkflow automation

Active Targets

Near-term execution plan.

Certification

CEH Practical

Hands-on validation target focused on practical exploitation, enumeration, and reporting discipline.

Certification

HTB CPTS

Advanced penetration testing pathway for deeper methodology, chaining, and professional assessment rigor.

Market

International Roles

Positioning for high-trust remote and Dubai-market security roles with stronger proof, tooling, and communication.

Secure Channel

Ready for assessments, labs, and security engineering work.

Available for freelancer ethical hacking work, VAPT, AD security validation, SOC operations, CTF creation, CTFd setup, DFIR support, and security training. Contact: 9500565684 / sivatharansekarn@gmail.com.

Email Call LinkedIn

Security operator with builder instincts.

Execution brief

Security services I can provide.

Authorized scope only

Active Directory Attack Simulation

Web Application VAPT

Network and Server Assessment

SOC Operations

Incident Response and DFIR

Password Audit and Cracking Labs

CTF Creator and CTFd Operator

Security Training and Mentorship

Custom Security Tools

Numbers that show the grind.

From independent practice to structured security leadership.

M.Sc. Cybersecurity and Digital Forensics

Cybersecurity Consultant

Cybersecurity Trainer and VAPT Intern

Freelance Security Operator and Exploit Developer

Image panels for a stronger first impression.

Projects presented like real security products.

PyDF Framework

MemHunter

Red Team Workflow Kit

Mentor Attack Simulations

CTFd Event Stack

Tools I can prove through practical service work.

Active Directory

Web and VAPT

SOC Operations

DFIR and Reverse

CTF and Password Audit

Capability matrix with moving signal.

Primary domains

Tools and stack

Near-term execution plan.

CEH Practical

HTB CPTS

International Roles

Ready for assessments, labs, and security engineering work.