This is a write-up of the Neo Boffy challenge from the BSides Canberra 2018 CTF. This challenge was worth 1000 points. Being the hardest Linux binary level for the competition, the description was intentionally quite vague: Prove you’re not a mere human: ssh://immortal.libctf.so Solution The first thing we did was run the binary to see […]
Our journey to WWDC18. Apple’s Worldwide Developer Conference (WWDC) is held annually in San Jose — bringing developers from all around the world together to discuss and learn about new Apple developer technologies. Apple awards 350 scholarships to students from around the world. To apply for these scholarships, candidates must create a Swift or Xcode playground which demonstrates […]
This is a write-up of the Birdie Yellow challenge from the BSides Canberra 2018 CTF. This challenge was worth 175 points. The challenge The aim of the Birdie series is to pose as the “admin” user, without being able to simply enter “admin” into the username field. Birdie Yellow is no exception to this. When […]
Canberra Grammar School Code Cadets come 3rd in the BSides Canberra 2018 CTF The Canberra Grammar School Code Cadets once again participated in the annual BSides Canberra Capture the Flag (CTF) competition. This two-day competition has teams of hackers trying their skills at a variety of challenges — ranging from web vulnerabilities through to Linux challenges, binary exploitation, and OSINT/forensic […]
This is a write-up of the Fat Morphine challenge from the BSides Canberra 2018 CTF. This challenge was worth 400 points. The format of this is easy enough, but my name will be least significant when you go for the flag. Solution The first thing we did was to run the binary and see what […]
This is a write-up of the Maze — Two Bird challenge from the BSides Canberra 2018 CTF. This challenge was worth 350 points. So you know my first name. What else do you know about me? Or, what do you want to know? I’ll give you a hint, have a look at my profile picture attached. If […]
This is a write-up of the Red or Blue challenge from the BSides Canberra 2018 CTF. This challenge was worth 400 points. Does it end with the blue pill? Is the red pill leading into Wonderland? The challenge contained the above message, as well as two zip files: red.zipand blue.zip. The Hack When downloading the ZIP files […]
This is a write-up of the Pedantiism challenge from the BSides Canberra 2018 CTF. This challenge was worth 150 points. This was the second Linux/binary challenge and involved nmap and permission bypassing. Firstly, we needed to SSH into the challenge server: ssh://skid.libctf.so The main priority was discovering who owned the file flag.txt. so we could figure out what permissions […]
This is a write-up of the Old PC challenge from the BSides Canberra 2018 CTF. This challenge was worth 375 points. The only context given for the Old PC task was a single .bin file. With a size around 1.4MB, it was immediately assumed that this was a floppy disk image. After extracting the disk image, […]
This is a write-up of the Softcover Walk challenge from the BSides Canberra 2018 CTF. This challenge was worth 300 points. Description | Walk softly over to the edge and peak over to the flag. The challenge contained the above message, as well as an SSH address: ssh://peasant.libctf.so Looking around a bit, we found a challenges directory in […]
