The iossecuritysuite from sajibekanti

by @_r3ggi

ISS Description

🌏 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 (even the iOS 11+ with brand new indicators! 🔥)
Attached debugger 👨🏻‍🚀
If an app was run in emulator 👽
Common reverse engineering tools running on the device 🔭

Setup

There are 3 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"

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 specyfing URLs that will be queried.

<key>LSApplicationQueriesSchemes</key>
<array>
	<string>cydia</string>
	<string>undecimus</string>
	<string>sileo</string>
</array>

How to use

Jailbreak detector module

This method returns a binary value of 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: Cydia URL scheme detected, Suspicious file exists: /Library/MobileSubstrate/MobileSubstrate.dylib, Fork was able to create a new process

Debbuger detector module

let amIDebugged = IOSSecuritySuite.amIDebugged() ? true : false

Deny debugger at all

IOSSecuritySuite.denyDebugger()

Emulator detector module

let runInEmulator = IOSSecuritySuite.amIRunInEmulator() ? true : false

Reverse engineering tools detector module

let amIReverseEngineered = IOSSecuritySuite.amIReverseEngineered() ? true : false

Security considerations

Before using this and other platform security checkers you have to understand that:

Including this tool in your project is not the only thing you should do in order to improve your app security! You can read a general mobile security whitepaper here.
Detecting if a device is jailbroken is done locally on the device. It means that every jailbreak detector may be bypassed (even this)!
Swift code is considered to be harder to manipulate dynamically than Objective-C. Since this library was written in pure Swift, the IOSSecuritySuite methods shouldn't be exposed to Objective-C runtime (which makes it more difficult to bypass ✅). You have to know that attacker is still able to MSHookFunction/MSFindSymbol Swift symbols and dynamically change Swift code execution flow.
It's also a good idea to obfuscate the whole project code including this library. See Swiftshield

Contribution ❤️

Yes, please! If you have a better idea or you just want to improve this project, please text me on Twitter or Linkedin. Pull requests are more than welcome!

Special thanks: 👏🏻

kubajakowski for pointing out the problem with canOpenURL(_:) method
olbartek for code review and pull request
benbahrenburg for various ISS improvements

TODO

File integrity checks
Deny debugger

License

See the LICENSE file.

References

While creating this tool I used:

🔗 https://github.com/TheSwiftyCoder/JailBreak-Detection
🔗 https://github.com/abhinashjain/jailbreakdetection
🔗 https://gist.github.com/ddrccw/8412847
🔗 https://gist.github.com/bugaevc/4307eaf045e4b4264d8e395b5878a63b
📚 "iOS Application Security" by David Thiel

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iossecuritysuite's Introduction