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Mobile Threats 2013: Android Malware & Vulnerabilities

Mobile Threats 2013: Android Malware & Vulnerabilities. Robert Lipovsk y lipovsky@ eset.sk. Banking Trojans. Banking Trojans. Bypassing mTAN 2-factor authentication SpitMo , ZitMo , Carberp , Hesperbot , …. Banking Trojans. Rogue token generation apps. SMS Trojans.

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Mobile Threats 2013: Android Malware & Vulnerabilities

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  1. Mobile Threats 2013:Android Malware & Vulnerabilities Robert Lipovskylipovsky@eset.sk

  2. Banking Trojans

  3. Banking Trojans • Bypassing mTAN 2-factor authentication • SpitMo, ZitMo, Carberp, Hesperbot, …

  4. Banking Trojans • Rogue token generation apps

  5. SMS Trojans • 1st well-documented Android malware (FakePlayer) • Most prevalent category on Android • Premium SMS • Subscription to paid services

  6. Android/TrojanSMS.Boxer • Targeted 60+ different countries • Disguised as: • Sim City Deluxe Free, Need for Speed Shift Free, Assassin Creed, Angry Birds, … • Google Play & unofficial markets

  7. “Regular” Malware / Spyware • Botnets • Download more malware • Open websites • Data theft: • Messages, Contacts, Location, Apps, … • Access GPS sensor, microphone, camera, … Android/Spy.GPSpy.A

  8. Adware • Android/Adware.Waps • Android/Adware.Airpush • Homescreen shortcuts • Browser bookmarks/homepage • Notifications • Collect information • Etc.

  9. Scareware & Ransomware • Android/FakeAV

  10. Malware operations • Pay-per-install schemes • Botnets • DDoS • …

  11. Android Malware Detection Statistics November 2011 – October 2013

  12. Some Recent Vulnerabilities…

  13. The “BitCoin Vulnerability” • Java Cryptography Architecture • SecureRandom, KeyGenerator, KeyPairGenerator, KeyAgreement, Signature • OpenSSL PRNG • seed from /dev/urandom • Patched -> OHA • 55 Bitcoins stolen in August

  14. “WebView Vulnerability” • WebView – load HTML content within app • addJavascriptInterface(Objectobject, String name) • JavaScript can access object’s methods

  15. “WebView Vulnerability” • Problem: access to all public (incl.inherited) methods • Execute commands remotely in the context of the application through reflection • Android <4.2 • Since 4.2: @JavaScriptInterface annotation

  16. “Master Key” Vulnerability • Replacing code within application… • …without breaking its digital signature! • Android crypto verifier – MANIFEST.MF • Multiple files with same name in APK • Replace code, permissions, etc. • System applications

  17. USSD Vulnerability

  18. Thank you! lipovsky@eset.sk samples@eset.sk WeLiveSecurity.com VirusRadar.com

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