Rokkakei was the name given to an early puzzle box created by the now-defunct Kensho Security Labs as part of Project Yosegi, an effort to generate a number of VMs for use with the popular HTB platform. While Rokkakei was rejected from HTB, the original images remained available after Kensho Security Labs transitioned to being Arcana Labs.
Due to various technical issues, this box could not be updated to reflect this changed origin in time for the Illuminated Arcana Launch Party. Instead, it is left in its original state as a curiosity. This box comprises three challenges: comrpomising a vulnerable web service, exploiting that compromise to gain user access to the system, and then privilege escalation to root. It’s a straightforward and simplistic puzzle, tending more toward “puzzle” than realistic hacking effort.