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iOS: including Ordinary Security?

Raúl Siles Founder & Senior Security Analyst [email protected] December 2, 2016

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• iOS State-of-the-Art • Malware • Developers • Lock Screen • Digital Certificates • Software Updates • Wi-Fi • Conclusions

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Q2 2015: Android: 82.8% iOS: 13.9% WP: 2.6% BB: 0.3% Others: 0.4%

Consolidated trend to exceed more than 300 Reference: http://www.idc.com/prodserv/smartphone-os-market-share.jsp million units by quarter (Qx): 1,3 billions (2014)

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Official numbers: Official numbers:

• iOS 6: 197 • iOS 8: 56 • iOS after 10 years… • iOS 7: 80 • iOS 8.1: 5 • iOS 7.1: 41 • iOS 8.1.1: 9 Official –numbers?2007: iPhone 2G (iOS• … 1) • iOS 8.1.2: - Official– numbers2008: iPhone 3G (iOS 2) • iOS 8.1.3: 34 • iOS 10: 7 • iOS 8.2: 6 • iOS• iOS 10.0.1: 10:– 2009: 1 49 iPhone 3GS (iOS 3) • iOS 8.3: 58 Official numbers: • iOS• iOS 10.0.2: 10.0.1: 0 1 • iOS 8.4: 33 • iOS 10.0.2:– 2010: 0 iPhone 4 (iOS 4) + iPad 1 • iOS 8.4.1: 71 • iOS 9: 101 • wOS 3: 1 • iOS 9.0.1: - • wOS 3:– 2011: 19 iPhone 4S (iOS 5) + iPad 2 iOS 8.x: 272 • iOS 9.0.2: 1 • iOS 9.1: 49 – 2012: iPhone 5 (iOS 6) + iPad 3 & 4 & mini • iOS 9.2: 50 Official numbers: • iOS 9.2.1: 13 – 2013: iPhone 5c & 5s (iOS 7) + iPad air & mini 2 • iOS 9.3: 39 • wOS 1.0.1: 13 • iOS 9.3.1: - • wOS– 2.0:2014: 39 iPhone 6 & 6+ (iOS 8) + iPad air 2 & mini 3 • iOS 9.3.2: 39 • wOS 2.0.1: 14 • iOS 9.3.3: 46 • wOS– 2.1:2015: 30 iPhone 6S & 6S+ (iOS 9) + iPad Pro 12,9" & mini• iOS 4 9.3.4: 1 • wOS 2.2:• Apple 34 Watch & Apple Pencil • iOS 9.3.5: 3 • wOS 2.2.1: 26 • wOS– 2.2.2:2016: 26 iPhone SE + iPad Pro 9.7" + iPhone 7 & 7+ (iOS iOS10) 9.x: 342 wOS x.y: 182 6

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How do we identify or classify malware families and specimens if there are no anti-virus (or anti-malware) solutions for iOS? – Malware (CME) – Vulnerabilities (CVE)

2016 © Dino Security S.L. www.dinosec.com 8 All rights reserved. Todos los derechos reservados. Recent iOS Malware Trends (1/2)

• “No iOS Zone” (DoS) – Malicious SSL certificates (iOS < 8.3) (Apr'15) – https://www.skycure.com/blog/ios-shield-allows-dos-attacks-on--devices/ – WiFiGate: https://www.skycure.com/blog/wifigate-how-mobile-carriers-expose-us-to-wi-fi-attacks/ • XARA: Unauthorized Cross-App Resource Access on MAC OS X and iOS (Jun'15) – https://drive.google.com/file/d/0BxxXk1d3yyuZOFlsdkNMSGswSGs/view?pli=1 – http://www.imore.com/depth-look-ios-os-x-xara-vulnerabilities • KeyRaider: iOS Malware Steals Over 225,000 Apple Accounts (Aug'15) – http://researchcenter.paloaltonetworks.com/2015/08/keyraider-ios-malware-steals-over-225000-apple-accounts- to-create-free-app-utopia/ (for jailbroken devices) • Masque attack(s)… – "Masque Attack: All Your iOS Apps Belong to Us" (Nov'14) • https://www.fireeye.com/blog/threat-research/2014/11/masque-attack-all-your-ios-apps-belong-to-us.html – Wirelurker (Nov'14): http://researchcenter.paloaltonetworks.com/2014/11/wirelurker-new-era-os-x-ios-malware/ – "iOS Masque Attack Revived: Bypassing Prompt for Trust and App URL Scheme Hijacking" (Feb'15) • https://www.fireeye.com/blog/threat-research/2015/02/ios_masque_attackre.html – "Three New Masque Attacks against iOS: Demolishing, Breaking and Hijacking" (Jun'15) • https://www.fireeye.com/blog/threat-research/2015/06/three_new_masqueatt.html

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2016 © Dino Security S.L. www.dinosec.com 9 All rights reserved. Todos los derechos reservados. Recent iOS Malware Trends (2/2)

• …More masque attack(s) – "iOS Masque Attack Weaponized: A Real World Look" (Aug'15) • https://www.fireeye.com/blog/threat-research/2015/08/ios_masque_attackwe.html • XcodeGhost (Sep'15 & Nov'15) – http://researchcenter.paloaltonetworks.com/2015/09/novel-malware-xcodeghost-modifies--infects-apple- ios-apps-and-hits-app-store/ – https://blog.lookout.com/blog/2015/09/20/xcodeghost/ – https://blog.lookout.com/blog/2015/09/21/xcodeghost-apps – https://blog.lookout.com/blog/2015/09/22/xcodeghost-detection/ – https://www.fireeye.com/blog/threat-research/2015/11/xcodeghost_s_a_new.html • ZergHelper: Pirated iOS ’s Client (…) Evaded Apple iOS Code Review (Feb'16) – http://researchcenter.paloaltonetworks.com/2016/02/pirated-ios-app-stores-client-successfully-evaded-apple- ios-code-review/ • AceDeceiver: iOS Trojan Exploiting Apple DRM Design Flaws (…) (Mar'16) – http://researchcenter.paloaltonetworks.com/2016/03/acedeceiver-first-ios-trojan-exploiting-apple-drm-design- flaws-to-infect-any-ios-device/ • Pegasus: (Aug'16) – https://citizenlab.org/2016/08/million-dollar-dissident-iphone-zero-day-nso-group-uae/

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• Distributing Apps Out of the App Store • Abusing Apple Private APIs

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Enterprise Program (vs. Apple Developer Program) – https://developer.apple.com/programs/enterprise/ ($299/year) • Provision iOS apps for internal corporate distribution (in-house) – Enterprise certs and profiles can "only" be used for internal distribution – Technically, they can be used to install any app on any device • Violating Apple's Developer Enterprise Program terms of service – Avoid Apple's App Store vetting process • And it allows the usage of Apple private APIs (sensitive operations) • User must accept the app installation (two taps) – In iOS 9 it is required to manually trust the developer (provisioning profile)

http://johannesluderschmidt.de/provision-ios-ipa-app-for-in-house-enterprise-distribution/

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• Become an Apple enterprise "developer": $299/year • Generate a certificate to distribute iOS apps • Create a provisioning profile • Create the iOS app IPA file & associated Manifest file (PLIST) • Create an "itms-services" web link pointing to the Manifest – The Manifest file includes the reference to the IPA file (app) • Own a web server with a valid trusted certificate (HTTPS) • Distribute the web link: E.g. Tweet, web page, e-mail, dork, etc. – Real benign distribution cases in Spain and China

Install this app!

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• Objective-C – Message dispatch mechanism to invoke method/function calls – objc_msgSend (String parameters) • Class name and method name • Not resolved statically, but at runtime (or execution time) – Obfuscated and/or encrypted – Load a library (dlopen) and access a function (dlsym) • Runtime (or NSClassFromString / NSSelectorFromString) • Apple's App Store review or vetting process – Private APIs accessing sensitive user information

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• "iRiS: Vetting Private API Abuse in iOS Applications" (Oct 2015) – Dynamic analysis of API calls that cannot be resolved statically ("suspicious") – 2,019 apps analyzed: 146 (7%) make use of 150 private APIs (25 critical) • SourceDNA (Oct 2015) – Using the methods described in the previous slide… – 256 apps affected (+1 million downloads) – Youmi's Ad SDK (obfuscated binary ad library) • It sends user info to a server in China – List of installed apps, current running being, serial number, hardware components (peripherals), "e-mail" Apple ID…

http://www.cse.buffalo.edu/~mohaisen/classes/fall2015/cse709/docs/deng-ccs15. https://sourcedna.com/blog/20151018/ios-apps-using-private-apis.html

2016 © Dino Security S.L. www.dinosec.com 17 All rights reserved. Todos los derechos reservados. YiSpecter (Oct 5, 2015)

• Distributed through an Apple Enterprise Developer certificate – Evades Apple's App Store vetting process – Targets both jailbroken and non-jailbroken iOS devices