Android-apk bypasses the signature

Android-APK reverse and bypass signature

TOC

? 1.Android Killer connects to the night god simulator

1. Environment setup

• 1. Copy the files in the AndroidKiller path D:\Android\AndroidKiller\bin\adb to the location where the night god is located
  
• 2 .Use cmd to go to the D:\Android\AndroidKiller\bin\adb directory and execute the command: adb.exe connect 127.0.0.1:62001 ;62001 is the default port number of the Yeshen simulator; adb devices to view the connected simulator; refresh to find the device in Killer
  

? 2. Reverse of simple APK

1. According to the prompt of APK running, you can directly perform string search

2. The steps are shown in the figure:

3. After analysis, find the successful judgment The key code can be commented out directly; remember to save and compile again

? 3. Compilation fails and cannot be signed

1. When using Killer to install APK, Need to compile

• Compiled effect:
  

2. Find the key code through analysis, modify or in-depth analysis, and then repackage

• 1. Copy the smali folder Go to the tool folder
  
• 2.smali.jar (assembly tool, assemble smali code into dex file)
  
• 3. Unzip the APK, before replacing it Modified dex file
  
• 4. Compress the decompressed file again and modify the suffix .apk, run sign.bat to sign
  

< p>3. Install and run normally