zacheller@home:~/blog$

  • Devlympics 2021 - The Ultimate Warrior Arena - Cloud 5th Place

    On the inaugural Devlympics, I competed in the Ultimate Warrior Arena and got 5th place in the Cloud competition. My experience in securing Docker containers came in handy! If you want to make your setup much safer, please run docker as a non-root user!

  • TryHackMe - Relevant

    Room: Relevant Note: I mapped the target IP to relevant.thm in my /etc/hosts file. Enumeration root@ip-10-10-196-226:~# sudo nmap -p- -T4 relevant.thm Starting Nmap 7.60 ( https://nmap.org ) at 2021-03-03 21:31 GMT Verbosity Increased to 1. SYN Stealth Scan Timing: About 79.71% done; ETC: 21:56 (0:05:03 remaining) Verbosity Increased to 2....

  • A5/1 Stream Cipher Implementation

    What is A5/1? A5/1 is a stream cipher used to provide over-the-air communication privacy in the GSM cellular telephone standard. It is one of seven algorithms which were specified for GSM use. It was initially kept secret, but became public knowledge through leaks and reverse engineering. A number of serious...

  • TryHackMe - Steel Mountain

    Room: Steel Mountain Enumeration root@ip-10-10-71-9:~# nmap 10.10.139.244 -sC -sV -Pn Starting Nmap 7.60 ( https://nmap.org ) at 2021-01-31 21:08 GMT Nmap scan report for ip-10-10-139-244.eu-west-1.compute.internal (10.10.139.244) Host is up (0.00050s latency). Not shown: 988 closed ports PORT STATE SERVICE VERSION 80/tcp open http Microsoft IIS httpd 8.5 | http-methods: |_...