name: analyzing-ios-app-security-with-objection description: >- Runtime iOS app security testing with Objection (Frida): inspect keychain and filesystem data, explore app internals at runtime, and validate/bypass client-side protections during authorized mobile assessments. domain: cybersecurity subdomain: mobile-security author: mahipal tags:

• mobile-security
• ios
• objection
• frida
• owasp-mobile
• penetration-testing

version: 1.0.0 license: Apache-2.0 atlas_techniques:

• AML.T0054

nist_ai_rmf:

• MEASURE-2.7
• MANAGE-2.4
• GOVERN-6.2
• MAP-5.1

nist_csf:

• PR.PS-01
• PR.AA-05
• ID.RA-01
• DE.CM-09

mitre_attack:

• T1635
• T1414
• T1417.001
• T1409

Analyzing iOS App Security with Objection

When to Use

Use this skill when:

• Performing runtime security assessment of iOS applications during authorized penetration tests
• Inspecting iOS keychain, filesystem, and memory for sensitive data exposure
• Bypassing client-side security controls (SSL pinning, jailbreak detection) during security testing
• Evaluating iOS app behavior at runtime without access to source code

Do not use this skill on production devices without explicit authorization -- Objection modifies app runtime behavior and may trigger security monitoring.

Prerequisites

• Python 3.10+ with pip
• Objection installed: pip install objection
• Frida installed: pip install frida-tools
• Target iOS device (jailbroken with Frida server, or non-jailbroken with repackaged IPA)
• For non-jailbroken: objection patchipa to inject Frida gadget into IPA
• macOS recommended for iOS testing (Xcode, ideviceinstaller)
• USB connection to target device or network Frida server

Workflow

Step 1: Prepare the Testing Environment

For jailbroken devices:

# Install Frida server on device via Cydia/Sileo
# SSH to device and start Frida server
ssh root@<device_ip> "/usr/sbin/frida-server -D"
 
# Verify Frida connectivity
frida-ps -U  # List processes on USB-connected device

For non-jailbroken devices (authorized testing):

# Patch IPA with Frida gadget
objection patchipa --source target.ipa --codesign-signature "Apple Development: test@example.com"
 
# Install patched IPA
ideviceinstaller -i target-patched.ipa

Step 2: Attach Objection to Target App

# Attach to running app by bundle ID
objection --gadget "com.target.app" explore
 
# Or spawn the app fresh
objection --gadget "com.target.app" explore --startup-command "ios hooking list classes"

Once attached, Objection provides an interactive REPL for runtime exploration.

Step 3: Assess Data Storage Security (MASVS-STORAGE)

# Dump iOS Keychain items accessible to the app
ios keychain dump
 
# List files in app sandbox
ios plist cat Info.plist
env  # Show app environment paths
 
# Inspect NSUserDefaults for sensitive data
ios nsuserdefaults get
 
# List SQLite databases
sqlite connect app_data.db
sqlite execute query "SELECT * FROM credentials"
 
# Check for sensitive data in pasteboard
ios pasteboard monitor

Step 4: Evaluate Network Security (MASVS-NETWORK)

# Disable SSL/TLS certificate pinning
ios sslpinning disable
 
# Verify pinning is bypassed by observing traffic in Burp Suite proxy
# Monitor network-related class method calls
ios hooking watch class NSURLSession
ios hooking watch class NSURLConnection

Step 5: Inspect Authentication and Authorization (MASVS-AUTH)

# List all Objective-C classes
ios hooking list classes
 
# Search for authentication-related classes
ios hooking search classes Auth
ios hooking search classes Login
ios hooking search classes Token
 
# Hook authentication methods to observe parameters
ios hooking watch method "+[AuthManager validateToken:]" --dump-args --dump-return
 
# Monitor biometric authentication calls
ios hooking watch class LAContext

Step 6: Assess Binary Protections (MASVS-RESILIENCE)

# Check jailbreak detection implementation
ios jailbreak disable
 
# Simulate jailbreak detection bypass
ios jailbreak simulate
 
# List loaded frameworks and libraries
memory list modules
 
# Search memory for sensitive strings
memory search "password" --string
memory search "api_key" --string
memory search "Bearer" --string
 
# Dump specific memory regions
memory dump all dump_output/

Step 7: Review Platform Interaction (MASVS-PLATFORM)

# List URL schemes registered by the app
ios info binary
ios bundles list_frameworks
 
# Hook URL scheme handlers
ios hooking watch method "-[AppDelegate application:openURL:options:]" --dump-args
 
# Monitor clipboard access
ios pasteboard monitor
 
# Check for custom keyboard restrictions
ios hooking search classes UITextField

Key Concepts

Tools & Systems

• Objection: High-level Frida-powered mobile security exploration toolkit with pre-built commands
• Frida: Dynamic instrumentation framework providing JavaScript injection into native app processes
• Frida-tools: CLI utilities for Frida including frida-ps, frida-trace, and frida-discover
• ideviceinstaller: Cross-platform tool for installing/managing iOS apps via USB
• Burp Suite: HTTP proxy for intercepting traffic after SSL pinning bypass

Common Pitfalls

• App crashes on attach: Some apps implement Frida detection. Use --startup-command to hook anti-Frida checks early in the app lifecycle.
• Keychain access scope: Objection can only dump keychain items within the app's access group. System keychain items require separate jailbreak-level tools.
• Swift name mangling: Swift method names are mangled in the runtime. Use ios hooking list classes with grep to find demangled names.
• Non-persistent changes: All Objection modifications are runtime-only and reset on app restart. Document findings immediately.