Liam Geyer

Penn State CCSO’s first international CTF: SillyCTF. An overview of the event, and writeups of my challenges.

An Obsidian/Notetaking crash course explaining how to sync your vault and publish it to a website for free.

👾 Machine Overview This is a writeup of the chain Reflection from VulnLab, it’s a medium difficulty chain which featured RBCD, MSSQL, credential reuse, and more. 🔍 EnumerationAn initial nmap scan...

👾 Machine Overview This is a writeup of the machine Retro from VulnLab, it’s an easy difficulty Windows machine which featured pre-created machine accounts. 🔍 EnumerationAn initial nmap scan of t...

👾 Machine Overview This is a writeup of the machine Sendai from VulnLab, it’s a medium difficulty Windows machine which featured a pretty straightforward AD path, and ESC4. 🔍 EnumerationAn initia...

👾 Machine Overview This is a writeup of the chain Lustrous from VulnLab, it’s a medium difficulty Windows chain which featured ASREPRoasting, Kerberoasting, PowerShell Credential abuse, and the re...

👾 Machine Overview This is a writeup of the chain Hybrid from VulnLab, it’s an easy difficulty chain with both a Windows and Linux machine. This chain featured a Roundcube CVE, and a fun twist on ...

👾 Machine Overview This is a writeup of the machine Data from VulnLab, it’s an easy difficulty Linux machine which featured a Grafana CVE, a SUID binary, and docker misconfigurations. 🔍 Enumerati...

👾 Machine OverviewThis is a writeup of the machine Freelancer from HTB, it’s a hard difficulty Widows machine which featured IDOR, exploiting a SQL server, evading EDR, credential hunting, memory ...

👾 Machine OverviewThis is a writeup of the machine BoardLight from HTB, it’s an easy difficulty Linux machine which featured web enumeration, credential hunting, and exploiting a misconfigured SUI...