How To Disable Jailbreak Detection On Your IDevice [Guide]
Nelson Suggs
Now, we'll go through each tweak that can be used to minimize jailbreak detection. Some apps, however, cannot be patched and will not work when jailbroken, regardless of the content below. Other apps may need bypasses made specifically for them.
Main Bypass This guide is based off KernBypass so the only one I recommend is KernBypass. But there are two versions: 0.0.2 which you have to manually run every-time you reboot or 0.0.3 which runs as a daemon automatically when you jailbreak. I recommend 0.0.3 because it requires no effort.
Patched KernBypass memecity 0.0.3: deb: com.apple.memecity_0.0.3_iphoneos-arm.deb on repo: Patched by me hosted by quiprr. The only thing you have to do is remove the old kernbypass, move the file jp.akusio.kernbypass.plist to com.apple.memecity.plist it is located in /var/mobile/Library/Preferences/ Temporarily rename /var/lib/apt then reboot. jp.akusio.kernbypass.plist and /var/lib/apt must not exist. /var/lib/apt is a needed directory for your jailbreak to work so do not open a package manager if you rename them, rename them back before opening a package manager. Note that if /var/lib/apt is missing you package manager will not work so make sure to only rename it when you want to use the app.
However, since we are the root user, we can subvert these detection mechanisms. Largely this is done through hooking the application at run time using something like Frida, finding the functions that check the jailbreak, hooking them and then returning a false response. This can range from a simple boolean function to complex functions that require significant time to analyse and subvert.
DVIA has 5 levels of jailbreak detection. Level 2 you can do with the standard method of finding the Java class and the method, then hooking it with Frida or Objection to replace. However for the other levels this was not possible. This was due to DVIAv2 being written in Swift, and there is very little documentation on hooking Swift at runtime. I could find the methods with frida-trace, but had no meaningful way to interact with them.
Jailbreak detection is a mechanism that can vary from application to application. It prevents the user from opening or using the app if the device is jailbroken, even if the jailbreak is not currently active (e.g. after a reboot).
Bank apps are usually detecting jailbreaks too, but your account is not likely to get blocked. Most of the time you just cannot use the application because it will show a nag screen telling you that you are jailbroken.
Tweaks like Choicy (Free) can disable tweak injection for each individual app while leaving it on where you need it. Sometimes this is enough, but oftentimes you need to combine it with a tweak like KernBypass or VnodeBypass which actually attempt to bypass the jailbreak detection at a much deeper level.
Those mentioned above are usually the most popular way to block jailbreak detection, but they are not perfect, in fact, they are far from it. Working at the kernel level is dangerous can produce unexpected glitches and crashes, and for some apps, these solutions make no difference.
The goal of jailbreak detection is to make running the app on a non jailbroken device so that the attacker will not get more privileges, which in turn blocks some of the tools and techniques like reverse engineers etc. and it helps an application to prevent many vulnerabilities.
One-Time jailbreak detection bypass helps the pentester to permanently bypass the jailbreak detection for the respective application, Which means the pentester has to bypass the jailbreak detection only once.
For example, we can use Frida & Objection for bypassing the jailbreak detection at run-time. Once you bypass jailbreak detection with Frida & Objection, it only works till you run the Frida or objection. As you stop the Frida or objection respective applications again start detecting that the device is jailbroken.
Once a device is jailbroken, it becomes an easy target for threat actors who can flush volumes of malicious elements into the device and sniff sensitive user information. This also poses risks for the other genuine apps running on the jailbroken devices. Taking the required jailbreak detection bypass steps not only protects the app itself, but also the device and user data from being compromised at the hand of threat actors.
Jailbreak detection is the process by which you can figure out if an app is running on a jailbroken device or not. Though it seems like a relatively simple process, iOS detection for jailbreaking is not as straightforward as it may seem. Several complex processes and operations take place in a jailbroken device, otherwise absent in a regular device. This difference can be used for jailbreak detection.
Hackers use all sorts of tricks to achieve their goal of jailbreaking devices. Further, there are many types of jails, and each one has a different set of methods that can be used to detect them. In addition, the detection methods themselves change over time, meaning that once a jail detects the status of a device, the next time the user reboots the device, they might be in a different type of jail. The jailbreak detection methods can also change with each version of iOS, so it is difficult to predict what the detection method will look like.
One key fact that iOS detection for jailbreaking can depend on is figuring out if the app is asking for more resources and app data than allowed by the Apple operating system. The app may also look for other applications like Cydia, available only on jailbroken devices.
There are several jailbreak detection methods that you can use to prevent jailbreaks. Some of them are rather simple and are usually the ones easily bypassed by hackers. Some complex methods are a bit more difficult to bypass. We will look into a few of them below:
This iOS detection can be found on all devices. As soon as you boot or restart your device, the software checks whether all the processes, apps, and data are in accordance with the Apple guidelines and privacy policy. This is like a mandatory jailbreak detection method.
These are just a few ways of detecting jailbreaking in iOS devices. However, hackers are always looking out for loopholes to bypass the jailbreak detection methods and gain access to data. Being aware of how this can occur is important to effectively prevent your apps from being jailbroken.
Jailbreaking in itself may not be illegal, but the purpose for which jailbreaking is used can be a serious threat to people using the device. As an app developer, jailbreaking can compromise the security of your device and pose a threat, especially if your app is used to store important information such as bank details. So, it is better to prevent jailbreaking for security.
Appsealing is a security solution for iOS applications. It provides protection against jailbreak detection and integrity protection to ensure that the application code is not tampered with. We also provide anti-debugging and anti-trace capabilities so that no one can trace your app or find any error in it.
Jailbreaking an iPhone or iPod Touch basically involves replacing or modifying key components of Apple's iOS operating system with custom applications. As a result, it opens up your device to a number of possibilities beyond what Apple normally permits. This includes installing third-party apps, customizing the look of the phone's software, or even installing a whole new operating system entirely. However, jailbreaking a device is a complex process, but for the dedicated, it can mean they get more out of their iPhone or iPad Touch. It's not without its risks, however.
Jailbreaking your iPhone means freeing it from the limitations imposed by Apple. Although you can continue using the App Store, you can also install other apps from other stores, change the look of the operating system, and plenty more. There was a time when jailbreaking was almost essential to do any customization of your iPhone, or even to run apps in the background. However, jailbreaking has become less popular as iOS has evolved and Apple has added many of the features that were previously only available to the jailbreaking community. Still, jailbreaking can be useful to install and run apps that can't be found on the App Store, or even just as a step toward unlocking your iPhone so you can use it on another carrier.
At best, updating iOS will undo your jailbreak and you'll have to go through the whole process again. This also assumes that a jailbreak is available for the newer iOS version, which it often won't be, as it takes a while for the jailbreaking community to catch up when Apple releases a new iOS update.
Not only does Apple disapprove of jailbreaking in principle, but most of the methods used by jailbreaking tools on modern iPhone devices are actually exploiting security vulnerabilities in iOS or the underlying hardware to get into your device in the first place. This means that each time Apple releases a new iOS version, it often closes these doors, requiring the jailbreaking community to find another way to bypass Apple's security and get into the iPhone to install their own custom operating system enhancements.
Jailbreaking your device can be a fun way to explore a world outside of Apple's traditionally walled garden, but as you can probably see from the steps above, it's not for the faint of heart. You'll also want to watch out for many of the "fake" jailbreaking tools out there, as not every app or service that claims to "jailbreak" your device actually does so; many are merely repositories of additional apps that still have to operate under Apple's standard iOS restrictions. A true jailbreak modifies the underlying operating system so apps can do things that Apple doesn't normally permit, such as customizing your home screens, adding more powerful widgets, and running apps more freely in the background for things like call recording. As a rule, if a jailbreak tool seems too simple, or claims to support versions of iOS that the mainstream ones don't, then it's probably not offering a true jailbreak.
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