Learning programming has become a headache for many. There are those late nights when I look up at the bright moon, wondering when I can fully grasp assembly language and fulfill my dreams. But reality always hits hard…. There are many moments when I feel like smashing my keyboard, but we, the brave, will not … Read more
Friends with a bit of computer knowledge must know that computers only recognize 0s and 1s. Back in the day, to write a program, one had to use 0s and 1s, haha, cool right? The admiration for programmers likely originated from that time. Later, people found it very inconvenient to write programs using just 0s … Read more
He is the “Little Horse” mentioned by TK at the GeekPwn conference in 2015, another alchemist who intruded into the security circle (originally a chemistry major) – HyperChem. After a few years of experience in software unpacking, he is currently focusing on embedded security and firmware reverse engineering. This researcher from Tencent Security’s Xuanwu Lab, … Read more
With the advent of the 5G era, the role of the Internet of Things (IoT) is becoming increasingly important, along with more security risks. IoT security covers a wide range of topics. This series of articles will discuss the author’s understanding of IoT vulnerability research from a technical perspective. The author will explore five dimensions: … Read more
This article is a highlight from the KX forum, authored by KX forum user ID: Lpwn 1 Overview Using an old project on fan control as an experiment. It utilized external interrupts, timer interrupts, and PWM. The MCU is STM32F103ZET6. In the Keil settings, you can see the starting address of the firmware, which is … Read more
FreeRTOS Introduction FreeRTOS is a mini real-time operating system kernel. As a lightweight operating system, it includes functionalities such as task management, time management, semaphores, message queues, memory management, logging features, software timers, coroutines, etc., which can basically meet the needs of smaller systems. Compiling FreeRTOS Compilation Environment · Windows 10 20H2 · Keil V5.33.0.0 … Read more
Background Finally, with some rare free time and a long-lost passion, I quickly got to work. This is also a preliminary experience, so the goal is simply to dump the program and perform basic disassembly. Toolset Introduction Software Part OpenOCD Open On-Chip Debugger, a well-known open-source hardware debugger. Supports various debuggers like (St-link) and (jlink) … Read more
Compiling eBPF Programs on Android Pixel 6: Hiding Processes and Changing MAC Addresses Background Previously, I found an interesting repository on GitHub called bad-bpf. After some effort, I finally managed to compile it successfully on my phone, achieving the effects of replacing text and hiding processes as described in the repository. Other functionalities have not … Read more
Comprehensive Guide to Anti-Debugging Techniques in Android Reverse Engineering It has been a while since I last wrote an article. Recently, I have been working on several bank projects, and most financial apps have anti-debugging measures. Today, I would like to share some anti-debugging strategies that I frequently encounter in these projects. The following methods … Read more