Sebastian's Blog

software developer. security enthusiast.

Day: 20 December 2019

HV19.20 i want to play a game

The attached zip file contains a binary named game. Using ghidra to analyze the file showed, that this is some PS4 executable. The code opens a file /mnt/usb0/PS4UPDATE.PUP, validates the md5 hash and xors some content of the file with a key contained in the executable. As ghidra was unable to properly resolve references, it […]