Reverse Engineering

W26 VM Patcher

A toolkit for runtime patching of a custom Lua VM in mobile apps via Frida.

Timeline: 2 weeks
Year: 2026
W26 VM Patcher
Key Metrics
0
tools
0
custom VM

Challenge

A mobile app uses a modified Lua VM (W26 bytecode) inside the native libgame.so library. Standard analysis tools don't work with the custom bytecode format. The task was to reverse-engineer Proto structures, locate target instructions, and develop a runtime patching methodology.

Solution

Built a toolkit: W26 bytecode disassembler, Proto structure dumper, universal Frida launcher with ADB integration and RPC menu for real-time parameter tuning. The Frida script hooks loadFunction() in libgame.so and patches MULK instructions on the fly.

Tech Stack
Python JavaScript Frida ADB Lua VM ARM Assembly
Next case
Центр-Облако
R&D / Cloud Tech 2016

Центр-Облако

Existing mobile devices are tied to specific platforms (iOS, Android) and limited by hardware performance. The vision: a device where all apps execute in the cloud, with users accessing results through encrypted channels with biometric protection. All functions of a smartphone, computer, and cloud — in one.

4
years of R&D
49
testers
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