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Manish Chasta - Securing Android Applications

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Positive Hack Days
Positive Hack Days

Mansih Chasta is a principal consultant at Indusface with over 6 years of experience in information and application security. The document discusses an upcoming training on analyzing and reverse engineering Android applications. It will cover topics like the Android SDK, setting up a GoatDroid application, memory analysis, intercepting layer 7 traffic, reverse engineering Android apps, SQLite database analysis, and demonstrating exploits on an ExploitMe application. Statistics are provided on growth in mobile app downloads from 2010 to 2014.

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Mansih Chasta | CISSP, CHFI, ITIL
 Principal Consultant @ Indusface, India  Over 6 years experience in Information and Application Security  CISSP, CHFI, ITIL
What comes to any Indian’s mind when they think of Russia?
Manish Chasta - Securing Android Applications
 Introduction to Android and Mobile Applications  Working with Android SDK and Emulator  Setting up GoatDroid Application  Memory Analysis  Intercepting Layer 7 traffic  Reverse Engineering Android Applications  SQLite Database Analysis  Demo: ExploitMe application
 Gartner Says:  8.2 Billion mobile applications have been downloaded in 2010  17.7 Billion by 2011  185 Billion application will have been downloaded by 2014
Manish Chasta - Securing Android Applications
 Most widely used mobile OS  Developed by Google  OS + Middleware + Applications  Android Open Source Project (AOSP) is responsible for maintenance and further development
Manish Chasta - Securing Android Applications
 Linux kernel with system services:  Security  Memory and process management  Network stack  Provide driver to access hardware:  Camera  Display and audio  Wifi  …
 Core Libraries:  Written in Java  Provides the functionality of Java programming language  Interpreted by Dalvik VM  Dalvik VM:  Java based VM, a lightweight substitute to JVM  Unlike JVM, DVM is a register based Virtual Machine  DVM is optimized to run on limited main memory and less CPU usage  Java code (.class files) converted into .dex format to be able to run on Android platform
Manish Chasta - Securing Android Applications
 Thick and Thin Client  Security Measures  User Awareness
 Handset / Android Device  Android SDK and Eclipse  Emulator  Wireless Connectivity  And of course… Application file
 What we need:  Android SDK  Eclips  GoatDroid (Android App from OWASP)  MySQL  .Net Framwork  Proxy tool (Burp)  Agnitio  Android Device (Optional)  SQLitebrowser
Manish Chasta - Securing Android Applications
 Development Environment for Android Application Development  Components:  SDK Manager  AVD Manager  Emulator
 Can be downloaded from : developer.android.com/sdk/  Requires JDK to be installed  Install Eclipse  Install ADT Plugin for Eclipse
 Simple Next-next process
 Go to Help->Install new Software  Click Add  Give Name as ADT Plugin  Provide the below address in Location: http://dl- ssl.google.com/android/eclipse/  Press OK  Check next to ‘Developer Tool’ and press next  Click next and accept the ‘Terms and Conditions’  Click Finish
 Now go to Window -> Preferences  Click on Android in left panel  Browse the Android SDK directory  Press OK
Manish Chasta - Securing Android Applications
Manish Chasta - Securing Android Applications
 Click on Start
Manish Chasta - Securing Android Applications
Manish Chasta - Securing Android Applications
 Android Debug Bridge (adb) is a versatile command line tool that lets you communicate with an emulator instance or connected Android-powered device.  You can find the adb tool in <sdk>/platform-tools/
 Install an application to emulator or device:
 Push data to emulator / device  adb push <local> <remote>  Pull data to emulator / device  adb pull <remote> <local>  Remote - > Emulator and Local -> Machine
 Getting Shell of Emulator or Device  adb shell  Reading Logs  adb logcat
 Reading SQLite3 database  adb shell  Go to the path  SQLite3 database_name.db  .dump to see content of the db file and .schema to print the schema of the database on the screen  Reading Logs  adb logcat
Manish Chasta - Securing Android Applications
 What is Android Rooting?
Step 1: Download CF Rooted Kernel files and Odin3 Software
 Step 2: Keep handset on debugging mode
 Step 3: Run Odin3
 Step 4: Reboot the phone in download mode  Step 5: Connect to the PC
 Step 6: Select required file i.e: PDA, Phone, CSC files  Step 7: Click on Auto Reboot and F. Reset Time and hit Start button
 If your phone is Rooted... You will see PASS!! In Odin3
 Terminal Emulator  Proxy tool (transproxy)
 Both Android Phone and laptop (machine to be used in auditing) needs to be in same wireless LAN.  Provide Laptops IP address and port where proxy is listening in proxy tool (transproxy) installed in machine.
 Burp is a HTTP proxy tool  Able to intercept layer 7 traffic and allows users to manipulate the HTTP Requests and Response
 DD Command:  dd if=filename.xyz of=/sdcard/SDA.dd  Application path on Android Device:  /data/data/com.application_name
Manish Chasta - Securing Android Applications
Manish Chasta - Securing Android Applications
Manish Chasta - Securing Android Applications
 Install MySQL  Install fourgoats database.  Create a user with name as "goatboy", password as "goatdroid" and Limit Connectivity to Hosts Matching "localhost". Also "goatboy" needs to have insert, delete, update, select on fourgoats database.
 Run goatdroid-beta-v0.1.2.jar file  Set the path for Android SDK Root directory and Virtual Devices:  Click Configure -> edit and click on Android tab  Set path for Android SDK, typically it should be ▪ C:Program FilesAndroidandroid-sdk  Set path for Virtual Devices, typically it should be ▪ C:Documents and SettingsManishandroidavd
 Start web services  Start emulator through GoatDroid jar file  Push / Install the application to Device  Run FourGoat application from emulator  Click on Menu and then click on Destination Info  Provide following information in required fields:  Server: 10.0.2.2 and Port 8888
Demo / Hands On
 Assuming FourGoat is already installed  Run goatdroid-beta-v0.1.2.jar file and start web services  Start any HTTP Proxy (Burp) tool on port 7000  Configure Burp to forward the incoming traffic to port 8888  Start emulator from command line by giving following command:  emulator –avd test2 –http-proxy 127.0.0.1:7000
 Open the FourGoat application in emulator  Click on Mene to set Destination Info  Set Destination Info as below:  Server: 10.0.2.2 and port as 7000  Now see if you are able to intercept the trrafic in Burp 
Demo / Hands On
Demo / Hands On
Demo / Hands On
Demo / Hands On
• Install the app in Android device • Set the destination info as below: • Server: IP address (WLAN) of your laptop and port as 8888 (incase no proxy is listening) • Memory Analysis through Terminal Emulator and DD command
Next Topic
Manish Chasta - Securing Android Applications
 Vulnerabilities can be found through Reverse Engineering :  Vulnerabilities in Source Code  Re-compile the application  Commented Code  Hard coded information
 Dex to jar (dex2jar)  C:dex2jar-versiondex2jar.bat someApk.apk  Open code files in any Java decompile
Demo / Hands On
 Mobile Application Coder Review tool  Install: Next-Next process  Can analyze Codebase as well as .apk file
Demo / Hands On
Manish Chasta - Securing Android Applications
 SQLite Database:  SQLite is a widely used, lightweight database  Used by most mobile OS i.e. iPhone, Android, Symbian, webOS  SQLite is a free to use and open source database  Zero-configuration - no setup or administration needed.  A complete database is stored in a single cross-platform disk file.
 Pull the .db files out of the emulator / Device as explained eirler  Tools  SQLite browser  Epilog
Demo / Hands On
Manish Chasta - Securing Android Applications
Demo / Hands On
Спасибо Manish Chasta Email: manish.chasta@owasp.org Twitter: twitter.com/manish_chasta LinkedIn: http://www.linkedin.com/pub/dir/Manish/Chasta

More Related Content

Manish Chasta - Securing Android Applications

  • 1. Mansih Chasta | CISSP, CHFI, ITIL
  • 2. Principal Consultant @ Indusface, India  Over 6 years experience in Information and Application Security  CISSP, CHFI, ITIL
  • 3. What comes to any Indian’s mind when they think of Russia?
  • 5. Introduction to Android and Mobile Applications  Working with Android SDK and Emulator  Setting up GoatDroid Application  Memory Analysis  Intercepting Layer 7 traffic  Reverse Engineering Android Applications  SQLite Database Analysis  Demo: ExploitMe application
  • 6. Gartner Says:  8.2 Billion mobile applications have been downloaded in 2010  17.7 Billion by 2011  185 Billion application will have been downloaded by 2014
  • 8. Most widely used mobile OS  Developed by Google  OS + Middleware + Applications  Android Open Source Project (AOSP) is responsible for maintenance and further development
  • 10. Linux kernel with system services:  Security  Memory and process management  Network stack  Provide driver to access hardware:  Camera  Display and audio  Wifi  …
  • 11. Core Libraries:  Written in Java  Provides the functionality of Java programming language  Interpreted by Dalvik VM  Dalvik VM:  Java based VM, a lightweight substitute to JVM  Unlike JVM, DVM is a register based Virtual Machine  DVM is optimized to run on limited main memory and less CPU usage  Java code (.class files) converted into .dex format to be able to run on Android platform
  • 13. Thick and Thin Client  Security Measures  User Awareness
  • 14. Handset / Android Device  Android SDK and Eclipse  Emulator  Wireless Connectivity  And of course… Application file
  • 15. What we need:  Android SDK  Eclips  GoatDroid (Android App from OWASP)  MySQL  .Net Framwork  Proxy tool (Burp)  Agnitio  Android Device (Optional)  SQLitebrowser
  • 17. Development Environment for Android Application Development  Components:  SDK Manager  AVD Manager  Emulator
  • 18. Can be downloaded from : developer.android.com/sdk/  Requires JDK to be installed  Install Eclipse  Install ADT Plugin for Eclipse
  • 19. Simple Next-next process
  • 20. Go to Help->Install new Software  Click Add  Give Name as ADT Plugin  Provide the below address in Location: http://dl- ssl.google.com/android/eclipse/  Press OK  Check next to ‘Developer Tool’ and press next  Click next and accept the ‘Terms and Conditions’  Click Finish
  • 21. Now go to Window -> Preferences  Click on Android in left panel  Browse the Android SDK directory  Press OK
  • 24. Click on Start
  • 27. Android Debug Bridge (adb) is a versatile command line tool that lets you communicate with an emulator instance or connected Android-powered device.  You can find the adb tool in <sdk>/platform-tools/
  • 28. Install an application to emulator or device:
  • 29. Push data to emulator / device  adb push <local> <remote>  Pull data to emulator / device  adb pull <remote> <local>  Remote - > Emulator and Local -> Machine
  • 30. Getting Shell of Emulator or Device  adb shell  Reading Logs  adb logcat
  • 31. Reading SQLite3 database  adb shell  Go to the path  SQLite3 database_name.db  .dump to see content of the db file and .schema to print the schema of the database on the screen  Reading Logs  adb logcat
  • 33. What is Android Rooting?
  • 34. Step 1: Download CF Rooted Kernel files and Odin3 Software
  • 35. Step 2: Keep handset on debugging mode
  • 36. Step 3: Run Odin3
  • 37. Step 4: Reboot the phone in download mode  Step 5: Connect to the PC
  • 38. Step 6: Select required file i.e: PDA, Phone, CSC files  Step 7: Click on Auto Reboot and F. Reset Time and hit Start button
  • 39. If your phone is Rooted... You will see PASS!! In Odin3
  • 40. Terminal Emulator  Proxy tool (transproxy)
  • 41. Both Android Phone and laptop (machine to be used in auditing) needs to be in same wireless LAN.  Provide Laptops IP address and port where proxy is listening in proxy tool (transproxy) installed in machine.
  • 42. Burp is a HTTP proxy tool  Able to intercept layer 7 traffic and allows users to manipulate the HTTP Requests and Response
  • 43. DD Command:  dd if=filename.xyz of=/sdcard/SDA.dd  Application path on Android Device:  /data/data/com.application_name
  • 47. Install MySQL  Install fourgoats database.  Create a user with name as "goatboy", password as "goatdroid" and Limit Connectivity to Hosts Matching "localhost". Also "goatboy" needs to have insert, delete, update, select on fourgoats database.
  • 48. Run goatdroid-beta-v0.1.2.jar file  Set the path for Android SDK Root directory and Virtual Devices:  Click Configure -> edit and click on Android tab  Set path for Android SDK, typically it should be ▪ C:Program FilesAndroidandroid-sdk  Set path for Virtual Devices, typically it should be ▪ C:Documents and SettingsManishandroidavd
  • 49. Start web services  Start emulator through GoatDroid jar file  Push / Install the application to Device  Run FourGoat application from emulator  Click on Menu and then click on Destination Info  Provide following information in required fields:  Server: 10.0.2.2 and Port 8888
  • 51. Assuming FourGoat is already installed  Run goatdroid-beta-v0.1.2.jar file and start web services  Start any HTTP Proxy (Burp) tool on port 7000  Configure Burp to forward the incoming traffic to port 8888  Start emulator from command line by giving following command:  emulator –avd test2 –http-proxy 127.0.0.1:7000
  • 52. Open the FourGoat application in emulator  Click on Mene to set Destination Info  Set Destination Info as below:  Server: 10.0.2.2 and port as 7000  Now see if you are able to intercept the trrafic in Burp 
  • 57. • Install the app in Android device • Set the destination info as below: • Server: IP address (WLAN) of your laptop and port as 8888 (incase no proxy is listening) • Memory Analysis through Terminal Emulator and DD command
  • 60. Vulnerabilities can be found through Reverse Engineering :  Vulnerabilities in Source Code  Re-compile the application  Commented Code  Hard coded information
  • 61. Dex to jar (dex2jar)  C:dex2jar-versiondex2jar.bat someApk.apk  Open code files in any Java decompile
  • 63. Mobile Application Coder Review tool  Install: Next-Next process  Can analyze Codebase as well as .apk file
  • 66. SQLite Database:  SQLite is a widely used, lightweight database  Used by most mobile OS i.e. iPhone, Android, Symbian, webOS  SQLite is a free to use and open source database  Zero-configuration - no setup or administration needed.  A complete database is stored in a single cross-platform disk file.
  • 67. Pull the .db files out of the emulator / Device as explained eirler  Tools  SQLite browser  Epilog
  • 71. Спасибо Manish Chasta Email: manish.chasta@owasp.org Twitter: twitter.com/manish_chasta LinkedIn: http://www.linkedin.com/pub/dir/Manish/Chasta

Editor's Notes

  1. The figure have reached 17.7 Billion which is 117% increase compared to applications downloaded in 2010