Author:
Ben_Lolo

Language:
C/C++

Upload:
1:11 AM 04/12/2025

Platform
Unix/linux etc.

Difficulty:
5.0

Quality:
5.3

Arch:
x86-64

Description

Delve into the world of virtualized code to recover a sacred phrase. This challenge provides a great opportunity to implement a custom processor for Ghidra or develop an architecture plugin for BinaryNinja. Various obstacles hinder static and dynamic analysis, but can be overcome using normal reversing techniques. Non-trivial protection algorithms are well-documented and conform to their respective specifications. * Encrypted strings * Anti-debug * Anti-breakpoint * Anti-thread suspension * Anti-patch * Virtualized code with loops, if/else, and janky functions

• Comments
• Solutions

Elvis on 10:37 AM 04/18/2025: Nice WU. But did you miss include binary ninja arch plugin? Maybe you can upload another solution with binary ninja arch plugin. I would be glad to approve it and delete old solution

whitequark on 12:06 PM 04/18/2025: The BN plugin is included, do `ln $(pwd)/bn ~/.binaryninja/plugins/weeper` and you should be able to open the .bndb. My bad, I should've added that to the writeup

Elvis on 12:24 PM 04/18/2025: Got it. Thank whitequark

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