DevOps Engineer // Security Enthusiast // Something

Running a Fully Automated Media Server

No Plex Zone 8 years ago I started No Plex Zone. It was a great foray into building my own home lab and learning Linux. I initially just wanted to watch movies and shows in my college campus, and before long my friends asked me if they could also watch stuff on my Plex server too. I happily obliged and manually grabbed new releases when asked. This process quickly became unsustainable.

bchoy.me ver.1.22474487139...

It’s been a long while since I’ve updated this blog - almost 4 years. During this time I’ve grown immensely and there were many things worth posting here. Unfortunately I neglected maintaining my personal blog to the point where the main domain doesn’t even work. I started a personal project recently that inspired me to start blogging again, until I saw this disaster. Original Directory Structure Redone Directory Structure I didn’t even have a linter back then and wanted to fix this first before adding more content.

HackTheBox SwagShop

Over a year has passed since I’ve last done anything related to penetration testing. I decided to tackle the SwagShop machine on HackTheBox to ease back into things since it has a nice friendly green “Easy” rating. Note: This post is hidden until the machine is “Retired” to avoid spoilers to the community.

How A Cryptocurrency Miner Made Its Way onto Our Internal Kubernetes Clusters

Medium post: https://medium.com/jw-player-engineering/how-a-cryptocurrency-miner-made-its-way-onto-our-internal-kubernetes-clusters-9b09c4704205

The explosion of cryptocurrency in recent years spurred a wave of exploits targeting unsuspecting machines to mine cryptocurrency for the attackers. Earlier in the year, the JW Player DevOps team discovered one of the aforementioned miners running on our development and staging Kubernetes clusters.

To be clear, our production cluster was not affected, no JW Player customer data was accessed or exposed, and service was uninterrupted. Malicious actors are not always intent on stealing information or taking a website down, they can be just as content (or more so) in stealing your compute power. We take any intrusion very seriously though, and wanted to share our findings to help other DevOps teams harden their systems.

This blog post is broken up into several parts detailing — discovery and diagnosis, our immediate response, discovering and replicating the attack vector, damage assessment, and plans for preventative measures to further protect our systems.

VMWare SSH Bug

When using VMWare to do work on my virtual machines, I came across an annoying bug where all my SSH connections failed:

$ ssh root@
packet_write_wait: Connection to port 22: Broken pipe

OverTheWire Natas

Following up on my Bandit post, OverTheWire Natas teaches the basics of serverside web-security. These are quick notes for my solutions to level 0-10. I’ll be doing these in preperation for the OSCP pentesting course I plan on taking.

Level 0

The password to this level is listed on the natas game description:

Username: natas0
Password: natas0
URL:      http://natas0.natas.labs.overthewire.org