Android | TLDRBins

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Unpack .apk file


# Get .smali files
java -jar apktool_2.9.3.jar d <FILE>
Sample Output:
TO-DO


# Get .java files
jadx <FILE>
Sample Output:
TO-DO

Ref: apktool
Ref: jadx

Re-pack .apk file

1. Initial pack


java -jar apktool_2.9.3.jar b --use-aapt2 <APP> -o <APP>_repacked.apk
Sample Output:
TO-DO

2. zip align

zipalign

3. Sign the apk


keytool -genkey -v -keystore my-release-key.jks -keyalg RSA -keysize 2048 -validity 10000 -alias my-alias
Sample Output:
TO-DO


apksigner sign --ks my-release-key.jks --ks-pass pass:'<PASSWORD>' --out <APP>_final.apk <APP>_repacked.apk
Sample Output:
TO-DO

Dynamic Debugging

1. Set up


+--------------------------------------------------------------------+
| 1. Open genymotion and boot up Galaxy S9 (Random Pick)             |
| 2. Open IntelliJ Idea IDE                                          |
| 3. Open -> app (The folder just unpacked using apktool)            |
| 4. Run -> Edit Config -> JVM Remote Debug -> OK                    |
| 5. File -> Project Structure -> Project -> SDK -> OpenSDK 20 -> OK |
+--------------------------------------------------------------------+
Sample Output:
TO-DO

2. Connect


./adb kill-server
Sample Output:
TO-DO


./adb connect 127.0.0.1:6555
Sample Output:
TO-DO


./adb -s 127.0.0.1:6555 install <FILE>
Sample Output:
TO-DO

3. Run the app


+-------------------------+
| Run the app in emulator |
+-------------------------+
Sample Output:
TO-DO

4. Get PID and forward to Debugger


./adb -s 127.0.0.1:6555 shell ps -A | grep <REVERSE_DOMAIN_NAME_NOTATION>
Sample Output:
TO-DO


./adb -s 127.0.0.1:6555 forward tcp:5005 jdwp:<PID>
Sample Output:
TO-DO

5. StartDebugging


+-------------------------------------------+
| Click the debug icon in IntelliJ Idea IDE |
+-------------------------------------------+
Sample Output:
TO-DO