The art of android hacking
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Null/OWASP Delhi chapter talk - 19th March 2016
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The art of android hacking
- 1. The Art Of Android Hacking by, Abhinav Mishra (0ctac0der)
- 2. Who is this weird tall guy?? Abhinav Mishra | @0ctac0der Senior Security Consultant @ TOTHENEW Digital Top 5 Mobile Security Researcher | Synack Red Team (@SynackRedTeam) Web and Mobile Application Security Researcher Bug Bounty Hunter, Speaker, Trainer, Traveler, Movie buff Have you seen “Mr. Robot” ? Any comments? Link
- 3. What is he talking about?? ● Android application security ○ Android architecture ○ Application structure ○ Cool tools and distributions ○ Emulators, Devices, Attacks, Vulnerabilities ….. ● What (& How) to look for in an android application ● Some interesting findings ● (Random talks) ● Cool demonstrations ● Next steps to learn android appsec
- 4. Que le jeu commence….. Quick Questions ● What all you know about android… ● Application structure ● Vulnerability ? Okay, my turn now ● What you want to know/learn? ● What you want me to demo? ● Any tool you love? We can talk….
- 5. Quick Android Walkthrough ● Linux Kernel ● Privilege separation Model (UID & GID) ● Android Permission model (android manifest) ● APK components: ○ AndroidManifest.xml ○ Classes.dex ○ META-INF ○ Resources.arsc ○ Assets ○ Res ○ Lib
- 6. Reversing a cute APK Things I am going to do in next 10-15 minutes: ● Choose any apk ● Decompile with apktool | $apktool d package_name.apk ● Read and understand the AndroidManifest.xml ● Showing components in the code: ○ Activities, Broadcast receivers, Content providers …. ● Extract the apk with any extractor ● Change the classes.dex to jar | $dex2jar classes.dex ● Show multiple java classes ● Possible issues to be discovered ● SMALI files and converting to JAR
- 7. Tools & Demos ● Emulators??? ○ Genymotion ○ Android Studio | AVD ● ADB (Android Debug Bridge) ○ $adb install ○ $ adb pull / push ● AppUse Virtual Machine ● Android Monitor / Logcat ● Application Local files
- 8. Drozer Basics ● Drozer client and server ● Setting up the console ● Basic commands: ○ $ run app.packer.list ○ $run app.package.info ○ $run app.package.attacksurface ○ $ run app.activity.start
- 9. 15 min checks 1. Debuggable | Backup : True ??? 2. AndroidManifest: Permissions 3. Hardcoded stuff 4. SSL Pinning ?? 5. Drozer: attack surface | exported components 6. Local storage encryption 7. Sdcard storage | public folder usage 8. TLS protection check
- 10. Because Money matters Vulnerability 1 Date: Mar-2014 Issue: Debuggable = True Bounty: $500 How to check: APK AndroidManifest.xml “debuggable=true”
- 11. Because Money matters Vulnerability 2 Date: May-2015 Issue: App fragment injection Bounty: $250 How to check: Anyone?
- 12. Because Money matters Vulnerability 3 Date: May-2015 Issue: Hardcoded Account Credentials Bounty: $200 How to check: Anyone?
- 13. Because Money matters Vulnerability 4 Date: June-2015 Issue: Exported component malicious usage Bounty: $1000 How to check: Anyone?
- 14. Because Money matters Vulnerability 5 Date: Oct-2015 Issue: Parameter manipulation Bounty: $1000 How to check: Let me explain this one to you.
- 15. My virtual machine (Droider) Prerequisites ● 16 GB RAM ● Intel COREi7 processor ● 500 GB free hard disk space ● Minimum internet speed required 50 MBPS ● Google Nexus 7 device, rooted
- 16. What Next …. ● Learn more ● Read online ● Use tools: Drozer, QARK etc. ● Start practising