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Rian Friedt Security Blog

Offensive Security Blog

Practical notes from penetration testing, Active Directory labs, and red team research.

I write about the way I learn and test: building labs, breaking down attack paths, validating impact, and translating offensive lessons into defensive improvements. The focus is methodology, responsible research, and practical security work.

Active Directory

Enumeration, trusts, Kerberos, DACLs, ADCS, BloodHound and enterprise attack paths.

Red Team Operations

C2 concepts, lateral movement, payload research, detection thinking and reporting discipline.

Certification Journey

OSCP, CPTS, CAPE and lessons from hands-on labs without turning posts into spoilers.

Latest research notes

OSEP Exam Review and Prep Guide 2025

OSEP Exam Review & Prep Guide 2025

My no-spoiler OSEP review: preparation strategy, Windows lab mindset, evasion reasoning, reporting lessons, and what actually helped me pass.

OSCP vs CPTS in 2025 One Made Me a Pentester The Other Got Me Hired

OSCP vs CPTS in 2025 One Made Me a Pentester The Other Got Me Hired

Hi, Im Rian glad that you showed up i will compare OSCP with CPTS. Enjoy <3 This article is a

Windows Evasion Techniques: Outsmarting Windows Defender

Windows Evasion Techniques: Outsmarting Windows Defender

Microsoft Defender isn’t just antivirus anymore it is a full-spectrum detection engine guarding every Windows endpoint in real time. This

Active Directory Trust Attacks: Good Friends Today, Footholds Tomorrow

Active Directory Trust Attacks: Good Friends Today, Footholds Tomorrow

Active Directory trusts aren’t just for convenience they’re the secret backdoors most defenders forget to lock. In the wrong hands,

ADCS: Mastering Domain Compromise in Minutes

ADCS: Mastering Domain Compromise in Minutes

ADCS is no longer just a PKI concern it’s a domain compromise waiting to happen. Learn how to abuse or

Sliver C2: Mastering Command & Control for Red Team Operations

Sliver C2: Mastering Command & Control for Red Team Operations

Quick Overview Command and Control (C2) servers are critical components in offensive security, allowing red teamers and penetration testers to

DACL Attacks II: Mastering the Art of Exploiting Misconfigurations

DACL Attacks II: Mastering the Art of Exploiting Misconfigurations

Quick Overview This advanced module on Discretionary Access Control Lists (DACLs) takes you deeper into the world of Windows Active

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