About — Ahmet Payaslıoğlu

// professional summary

Who I Am

Senior Cyber Security Incident Responder (L3) and Threat Hunter with 5+ years of hands-on experience across SOC operations, incident response, digital forensics, threat detection engineering and cyber threat intelligence.

Currently working as an L3 Incident Response analyst in a large-scale enterprise banking environment, acting as the escalation point for L1/L2 SOC analysts and providing technical guidance, and contributing to playbook development, detection rule engineering, compromise assessments, malware analysis and proactive threat hunting.

Previously specialized in detection engineering and threat research — building detection content with YARA, Sigma and OSQuery, developing SIEM and EDR rules, performing static and dynamic malware analysis, and mapping attacker TTPs to MITRE ATT&CK across Windows, Linux, macOS and ESXi environments. Focused on detecting advanced threats, reducing mean time to respond, and turning threat intelligence into actionable defenses.

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Professional Experience

Jul 2024 – Present

Senior Cyber Security Incident Responder (L3) — SOC

DenizBank / Intertech (IT subsidiary of DenizBank) — Istanbul, Türkiye

Act as Level 3 Incident Response specialist, providing pivotal support and technical guidance to L1/L2 SOC analysts.
Lead incident response efforts to rapidly contain security incidents and minimize organizational impact.
Develop and maintain incident response playbooks documenting use-case actions and escalation paths.
Author and tune SIEM, EDR, YARA and Sigma rules to strengthen monitoring capabilities and reduce mean time to respond.
Conduct in-depth digital forensic investigations and compromise assessments to determine breach scope and root cause.
Perform proactive threat hunting and malware analysis to identify and eliminate threats before impact.
Track cyber threat intelligence sources and translate relevant threats into actionable defensive measures.
Prepare and present regular incident analysis reports to management; collaborate in purple team exercises with red team counterparts.

Technologies: SIEM, SOAR, EDR/XDR, AV, NDR, IPS/IDS, Firewall, IoC scanners, forensics tools, CTI tools, email/DNS/network/proxy security, WAF, attack simulation, sandboxes, honeypots, DLP

Jul 2021 – Jul 2024

Cyber Security Detection Engineer

Binalyze — Tallinn, Estonia

Researched malware families, attack chains and APT campaigns; extracted behaviors and TTPs from threat intelligence reports.
Created static and behavior-based detection rules using YARA, Sigma, OSQuery and SQL.
Performed static and dynamic malware analysis and mapped findings to the MITRE ATT&CK Enterprise matrix.
Drove R&D on DFIR product capabilities; added key forensic evidence sources across Windows, Linux and macOS.
Developed a Linux Process Analyzer for malicious process detection and an ESXi evidence collector.
Simulated and emulated adversary behavior; participated in purple team exercises and developed use cases for Binalyze AIR.

Jun 2020 – Jul 2020

SOC Analyst Intern

Bentego — Istanbul, Türkiye

Executed purple team activities with Atomic Red Team, Cobalt Strike and Sliver; monitored and analyzed resulting telemetry using the Elastic Stack (Elasticsearch, Kibana, Logstash).

// technical skills

Technical Skills

Incident Response & DFIR

L3 Incident ResponseDigital Forensics Compromise AssessmentThreat Hunting Forensics Tooling

Detection Engineering

YARASigma OSQuerySplunk SPL

Malware Analysis

Static AnalysisDynamic Analysis SandboxesIoC Extraction

Adversary Emulation & Purple Team

MITRE ATT&CKAdversary Emulation Purple TeamingAtomic Red Team Attack Simulation

SIEM / SOAR / EDR / XDR

SplunkArcSight XSOARCrowdStrike Falcon FDR

Network & Perimeter Security

NDRIDS/IPS WAFFirewall DNS SecurityEmail Security ProxyDLP

Threat Intelligence & Automation

CTI PlatformsIoC Scanners HoneypotsPython

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Education

2018 – 2022

B.Sc. Digital Forensics Engineering

Fırat University — Türkiye

2020 – 2021

Erasmus+ Exchange, Computer Science

University of Maribor — Slovenia

// languages

Languages

TR

Turkish

Native

EN

English

Full Professional Proficiency