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anti_android's Introduction

anti

Introduction

Is a protect Android App anti any attacks and environments.

可能会通过检测的方式来进行anti,也有可能通过攻击手段的实现原理进行anti。

Anti Frida

根据frida的实现细节来作出相应的anti对策。 frida在hook的时候会对目标应用的libc进行获取,使用目标libc的mmap将自身的相关so注册到目标maps表中;再执行目标libc的dlopen和dlsym函数将自身so中的函数进行执行,从而实现了hook操作,详情请看: https://github.com/frida/frida-core/blob/8f6e88225b702d062ab581c905448b88384f6ab6/src/linux/frida-helper-backend-glue.c anti frida的灵感也是来自于这里。就是将mmap一个只读的libc到maps表中,这样frida 无法将继续拿到可执行的libc从而崩溃。能够有效针对https://github.com/hluwa/strongR-frida-android 此类项目的去掉特征。

Anti Xposed/like Xposed

Anti Root

Anti Debug

Anti MemDump

Anti Virtual App/Multi Run

Anti Virtual App

Virtual App 会在自己的文件系统中创建一个文件目录,通过这特点可以判断是否为Virtual App,因为正常情况下,app访问所有父目录都是不可读的。 思路来自:https://juejin.cn/post/6964673582924300296#heading-18

Anti Emulator

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