Android Adb Pentesting

Android ADB Pentesting

A comprehensive guide for Android device testing and security assessment using ADB (Android Debug Bridge).

Connection and Setup

Locate ADB

Find the ADB binary on your system:

• Windows: C:\Users\<username>\AppData\Local\Android\sdk\platform-tools\adb.exe
• macOS: /Users/<username>/Library/Android/sdk/platform-tools/adb
• Linux: ~/.local/share/Android/Sdk/platform-tools/adb or /usr/bin/adb

List Connected Devices

adb devices

This shows all connected devices. If you see "unauthorized", you must:

1. Unlock the mobile device
2. Accept the RSA key fingerprint prompt on the device screen

Connect via TCP/IP

Start the ADB server on port 5555:

adb tcpip 5555

Then connect to the device:

adb connect <IP>:<PORT>

Handle Version Mismatches

If you encounter version mismatch errors (common with emulators like Genymotion):

adb server version (41) doesn't match this client (36); killing...

Find the emulator's ADB binary and use that instead:

• Genymotion: C:\Program Files\Genymobile\Genymotion\...\adb.exe

Multiple Devices

When multiple devices are connected, specify the target:

adb devices
# Output:
# 10.10.10.247:42135  offline
# 127.0.0.1:5555      device

adb -s 127.0.0.1:5555 shell

Port Tunneling via SSH

Forward ADB port through SSH when only localhost access is available:

ssh -i ssh_key username@10.10.10.10 -L 5555:127.0.0.1:5555 -p 2222
adb connect 127.0.0.1:5555

Package Management

Install Applications

adb install test.apk

Common options:

Uninstall Applications

adb uninstall com.test.app
adb uninstall -k com.test.app  # Keep data and cache directories

List Packages

adb shell pm list packages [options] [FILTER-STR]

Filter options:

Examples:

# List all third-party packages with file paths
adb shell pm list packages -f -3

# Find packages containing "facebook"
adb shell pm list packages facebook

# List system packages only
adb shell pm list packages -s

Get Package Path

adb shell pm path com.android.phone

Clear Package Data

adb shell pm clear com.test.abc

File Operations

Pull Files (Device → Computer)

adb pull /sdcard/demo.mp4 ./

Push Files (Computer → Device)

adb push test.apk /sdcard/

Screen Capture and Recording

Screenshot

adb shell screencap /sdcard/screen.png
adb pull /sdcard/screen.png ./

Screen Recording

adb shell screenrecord /sdcard/demo.mp4

Recording options:

Stop recording: Press Ctrl-C

Download the recording:

adb pull /sdcard/demo.mp4 ./

Shell Commands

Enter Device Shell

adb shell

Execute Single Command

adb shell ls
adb shell whoami

Common Shell Commands

pm list packages          # List installed packages
pm path <package>         # Get APK path
am start [options]        # Start an activity
am startservice [options] # Start a service
am broadcast [options]    # Send a broadcast
input text <text>         # Send text input
input keyevent <code>     # Send key event

Process Management

List All Processes

adb shell ps

Get Application PID

adb shell pidof com.your.application

System Commands

Restart ADB as Root

adb root

Note: Requires unlocked bootloader. Reconnect after running this command.

Sideload Updates

adb sideload update.zip

Logging and Debugging

Logcat Basics

adb logcat

Stop monitoring: Press Ctrl-C

Filter by Application PID

# Linux/macOS
adb logcat | grep 4526

# Windows
adb logcat | findstr 4526

Logcat Priority Levels

Logcat Buffers

adb logcat -b radio   # Radio/telephony messages
adb logcat -b event   # Event-related messages
adb logcat -b main    # Default buffer

Logcat Utilities

adb logcat -c              # Clear entire log
adb logcat -d              # Dump log and exit
adb logcat -f test.logs    # Write to file
adb logcat -g              # Print buffer size
adb logcat -n <count>      # Set max rotated logs

Dumpsys Commands

adb shell dumpsys           # List all dumpsys options
adb shell dumpsys meminfo   # Memory information
adb shell dumpsys battery   # Battery status

Battery Statistics

Collect battery data:

adb shell dumpsys batterystats > batterystats.txt

Visualize with Battery Historian:

python historian.py batterystats.txt > batterystats.html

Reset battery stats:

adb shell dumpsys batterystats --reset

Activity Dump

adb shell dumpsys activity

Backup and Restore

Create Backup

adb backup -f myapp_backup.ab -apk com.myapp

Backup options:

Restore Backup

adb restore myapp_backup.ab

Inspect Backup Contents

( printf "\x1f\x8b\x08\x00\x00\x00\x00\x00" ; tail -c +25 myapp_backup.ab ) | tar xfvz -

Common Pentesting Workflows

1. Initial Device Reconnaissance

# Connect and verify
adb devices

# Get device info
adb shell getprop

# List all packages
adb shell pm list packages -f -3

# Check for root
adb shell whoami

2. Application Analysis

# Find target app
adb shell pm list packages | grep target_app

# Get APK path
adb shell pm path com.target.app

# Pull APK
adb pull /path/to/app.apk ./

# Clear app data
adb shell pm clear com.target.app

3. Log Analysis

# Start monitoring with error level
adb logcat *:E

# Filter for specific app
adb shell pidof com.target.app
adb logcat | grep <PID>

# Save logs to file
adb logcat -d > app_logs.txt

4. Screen Recording for Evidence

# Record 60 seconds at 1080p
adb shell screenrecord --size 1920x1080 --time-limit 60 /sdcard/evidence.mp4

# Download
adb pull /sdcard/evidence.mp4 ./

Tips and Best Practices

1. Always verify device authorization before running commands
2. Use specific device IDs when multiple devices are connected
3. Filter logcat output to reduce noise and find relevant information
4. Save logs to files for later analysis rather than scrolling through terminal
5. Test commands on emulators first before using on production devices
6. Document findings with screenshots and screen recordings
7. Clear app data between test iterations for consistent results

Troubleshooting