CategorySecurity

Posted 26 March 2017 How-Tos

Hardening SSH on your Ubuntu Server

Secure Shell (SSH) is an amazing cryptographic network protocol, and it undoubtedly helps secure a huge slice of today’s Internet – giving sysadmins robust remote access to their servers, but also so much much … Continue Reading Hardening SSH on your Ubuntu Server

Posted 29 May 20161 Comment Security

AusCERT2016 CTF – 10th Place!

I recently finished competing in the AusCERT2016 Capture the Flag (CTF) challenge which ran for 48 hours. Coming in 10th place from dozens of active participants was very rewarding! I entered under the team … Continue Reading AusCERT2016 CTF – 10th Place!

Posted 4 July 2013 How-Tos

How to replace malicious PHP pages with sneaky POST data capture

Whenever I’ve had the task of personally assisting someone with remediating a compromised web server, I can’t help switching into researcher mode. I want to know how the attack has … Continue Reading How to replace malicious PHP pages with sneaky POST data capture

Posted 30 November 2010 Out and About

How NOT to build a Bank ATM

I was standing outside my office during a heavy downpour the other day, admiring that fresh thunderstorm feeling in the air, when we had a very brief power outage…Happened to glance over at a nearby Automatic Teller Machine (ATM) and to my aston…