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About Me

About Me

Hi there, I am Nikola. Thank you for visiting my webpage. My journey into the cyber security realm began with "malicious" intent. Back when Facebook was born, more then anything i wanted to "hack" my best friends account - (who didn't).

I am 25 years old now, happily married, father of a little girl, got my Master Degree in Computer Science, multiple Defensive/Offensive Cyber Security certificates with proven track record in identifying vulnerabilities and developing effective strategies to safeguard against cyber threats in enterprise environments.

I was a part of the Montenegro's Government CIRT, and as of June 2024, I work as a Information Security Professional at Erste Bank.

I also do freelance work over at Fiverr - Offensive Security operations, CTF creation as well as mentoring.

I enjoy fishing (not phishing, ok?), reading, writing and sleeping - pretty much anything i can do while sitting or laying down.

Education

University of Montenegro
BSc, Computer Science

University of Montenegro
MSc, Computer Science
Thesis: Development and implementation of a facial recognition intrusion detection system

Experience

Information Security Professional
Erste Bank
June. 2024 — Present

Threat Hunter
Ministry of Public Administration - Gov CIRT
Jan. 2023 — June 2024

Linux Engineer
3GProxy
Nov. 2022 — Jan. 2023

Skills / Vendors

  • Skills:
    - Linux (fedora/debian + downstreams(no alma), rhel)
    - Ansible, Docker, Nginx
    - Python, Bash, Awk/Sed, Javascript - node, express, psql, sequelize
    - Burp Suite, Kali/Remnux tooling in general, Metasploit, Havoc, Cobalt Strike, Nmap, Volatility, Assembly...
    - DFIR, Wireshark, EDR, SIEM, WAF, Proxy, DLP, PAM, ELK Stack, Wazuh, Security Onion.
    - AD, AD CS, GPOs, Windows shenanigans in general, Power BI (started to love this fella even if I hated at first (prefered pandas) - in combination with api and some automation, I am able to get high level reports/charts/trends of anything that upper management demands..)

  • Vendors
    - Trellix     (HX, EDR, ePolicy Orchestrator, SIEM)
    - Splunk Enterprise
    - Proofpoint
    - Qualys
    - Fireeye Email Threat Protection
    - Cisco Secure Web Appliance
    - Radware WAF/LB
    - F5 WAF/LB
    - ForcePoint DLP, NGFW
    - CloudFlare

CVEs

Coding projects

GitHub - goodfella-afk/gwsProject: Intended usage of this toolkit is to be of a assistance in delivering custom phishing campaigns in enterprise environments.
Intended usage of this toolkit is to be of a assistance in delivering custom phishing campaigns in enterprise environments. - goodfella-afk/gwsProject
GitHubgoodfella-afk
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Certifications

CompTIA Security+ ce Certification was issued by CompTIA to Nikola Zivkovic.
Earners of the CompTIA Security+ certification have the knowledge and skills necessary to perform core security functions required of any cybersecurity role. CompTIA Security+ professionals know how to identify and address potential threats, attacks and vulnerabilities and they have established techniques in risk management, risk mitigation, threat management and intrusion detection.
Credly
Ethical Hacker was issued by Cisco to Nikola Živković.
Cisco verifies the earner of this badge successfully completed the Ethical Hacker course. The holder of this student level credential has a broad understanding of the legal and compliance requirements and is proficient in the art of scoping, executing, reporting vulnerability assessments, and recommending mitigation strategies. The holder has completed up to 34 hands-on activities using Kali Linux, WebSploit, and other tools.
Credly

IEEE Publications

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[email protected]