IOSSecuritySuite

⭐️ Do you want to become a certified iOS Application Security Engineer? ⭐️

Check out our practical & fully online course at: https://courses.securing.pl/courses/iase

ISS Description

by @_r3ggi

🌏 iOS Security Suite is an advanced and easy-to-use platform security & anti-tampering library written in pure Swift! If you are developing for iOS and you want to protect your app according to the OWASP MASVS standard, chapter v8, then this library could save you a lot of time. 🚀

What ISS detects:

• Jailbreak 🧨
• Attached debugger 👨🏻‍🚀
• If an app was run in an emulator 👽
• Common reverse engineering tools running on the device 🔭

Setup

There are 4 ways you can start using IOSSecuritySuite

1. Add source

Add IOSSecuritySuite/*.swift files to your project

2. Setup with CocoaPods

pod 'IOSSecuritySuite'

3. Setup with Carthage

github "securing/IOSSecuritySuite"

4. Setup with Swift Package Manager

.package(url: "https://github.com/securing/IOSSecuritySuite.git", from: "1.5.0")

Update Info.plist

After adding ISS to your project, you will also need to update your main Info.plist. There is a check in jailbreak detection module that uses canOpenURL(_:) method and requires specifying URLs that will be queried.

<key>LSApplicationQueriesSchemes</key>
<array>
    <string>undecimus</string>
    <string>sileo</string>
    <string>zbra</string>
    <string>filza</string>
</array>

Pricing

Check our EULA license for the details.

TLDR: If your company employs:

• 0-99 people - free to use
• 100-1000 - 3k EUR/year
• 1000+ - 10k EUR/year

If you want to sell a module that uses the iOS Security Suite (it is not used directly in your app) - 10k EUR/year

Notice

iOS Security Suite is meant to be used on iOS/iPadOS. It should not be used on Macs with Apple Silicon.

How to use

Jailbreak detector module

• The simplest method returns True/False if you just want to know if the device is jailbroken or jailed

if IOSSecuritySuite.amIJailbroken() {
	print("This device is jailbroken")
} else {
	print("This device is not jailbroken")
}

• Verbose, if you also want to know what indicators were identified

let jailbreakStatus = IOSSecuritySuite.amIJailbrokenWithFailMessage()
if jailbreakStatus.jailbroken {
	print("This device is jailbroken")
	print("Because: \(jailbreakStatus.failMessage)")
} else {
	print("This device is not jailbroken")
}

The failMessage is a String containing comma-separated indicators as shown on the example below: sileo:// URL scheme detected, Suspicious file exists: /Library/MobileSubstrate/MobileSubstrate.dylib, Fork was able to create a new process

• Verbose & filterable, if you also want to for example identify devices that were jailbroken in the past, but now are jailed

let jailbreakStatus = IOSSecuritySuite.amIJailbrokenWithFailedChecks()
if jailbreakStatus.jailbroken {
   if (jailbreakStatus.failedChecks.contains { $0.check == .existenceOfSuspiciousFiles }) && (jailbreakStatus.failedChecks.contains { $0.check == .suspiciousFilesCanBeOpened }) {
         print("This is real jailbroken device")
   }
}

Debugger detector module

let amIDebugged: Bool = IOSSecuritySuite.amIDebugged()

Deny debugger at all

IOSSecuritySuite.denyDebugger()

Emulator detector module

let runInEmulator: Bool = IOSSecuritySuite.amIRunInEmulator()

Reverse engineering tools detector module

• The simplest method returns True/False if you just want to know if the device has evidence of reverse engineering

if IOSSecuritySuite.amIReverseEngineered() {
  print("This device has evidence of reverse engineering")
} else {
  print("This device hasn't evidence of reverse engineering")
}

• Verbose & filterable, if you also want the list of checks done

let reverseStatus = IOSSecuritySuite.amIReverseEngineeredWithFailedChecks()
if reverseStatus.reverseEngineered {
   // check for reverseStatus.failedChecks for more details
}

System proxy detector module

Now you can also detect if an app is connected to VPN

let amIProxied: Bool = IOSSecuritySuite.amIProxied(considerVPNConnectionAsProxy: true)

Lockdown mode detector module

let amIInLockdownMode: Bool = IOSSecuritySuite.amIInLockdownMode()

Experimental features

Runtime hook detector module

let amIRuntimeHooked: Bool = amIRuntimeHook(dyldWhiteList: dylds, detectionClass: SomeClass.self, selector: #selector(SomeClass.someFunction), isClassMethod: false)

Symbol hook deny module

// If we want to deny symbol hook of Swift function, we have to pass mangled name of that function
denySymbolHook("$s10Foundation5NSLogyySS_s7CVarArg_pdtF")   // denying hooking for the NSLog function
NSLog("Hello Symbol Hook")
     
denySymbolHook("abort") 
abort()

MSHook detector module

// Function declaration
func someFunction(takes: Int) -> Bool {
	return false
} 

// Defining FunctionType : @convention(thin) indicates a “thin” function reference, which uses the Swift calling convention with no special “self” or “context” parameters.
typealias FunctionType = @convention(thin) (Int) -> (Bool)

// Getting pointer address of function we want to verify
func getSwiftFunctionAddr(_ function: @escaping FunctionType) -> UnsafeMutableRawPointer {
	return unsafeBitCast(function, to: UnsafeMutableRawPointer.self)
}

let funcAddr = getSwiftFunctionAddr(someFunction)
let amIMSHooked = IOSSecuritySuite.amIMSHooked(funcAddr)

MSHook deny module

// Function declaration
func denyDebugger(value: Int) {
}

// Defining FunctionType : @convention(thin) indicates a “thin” function reference, which uses the Swift calling convention with no special “self” or “context” parameters.
typealias FunctionType = @convention(thin) (Int)->()

// Getting original function address
let funcDenyDebugger: FunctionType = denyDebugger 
let funcAddr = unsafeBitCast(funcDenyDebugger, to: UnsafeMutableRawPointer.self)


if let originalDenyDebugger = denyMSHook(funcAddr) {
// Call the original function with 1337 as Int argument
     unsafeBitCast(originalDenyDebugger, to: FunctionType.self)(1337)
 } else {
     denyDebugger()
 }

File integrity verifier module

// Determine if application has been tampered with 
if IOSSecuritySuite.amITampered([.bundleID("biz.securing.FrameworkClientApp"),
    .mobileProvision("2976c70b56e9ae1e2c8e8b231bf6b0cff12bbbd0a593f21846d9a004dd181be3"),
    .machO("IOSSecuritySuite", "6d8d460b9a4ee6c0f378e30f137cebaf2ce12bf31a2eef3729c36889158aa7fc")]).result {
    print("I have been Tampered.")
}
else {
    print("I have not been Tampered.")
}