We have developed a corporate-level mobile app in React Native for both Android and iOS. During a VAPT (Vulnerability Assessment and Penetration Testing), our client discovered that they could bypass our iOS jailbreak detection using the Hestia tweak app.

Without the Hestia tweak, our app successfully detects when a device is jailbroken and prevents usage. However, when Hestia is applied, it bypasses our jailbreak status check, allowing the app to function on a jailbroken device undetected.

Has anyone encountered this issue with Hestia or other similar jailbreak bypass tools? What are some best practices or advanced methods we can implement to strengthen our jailbreak detection in React Native, specifically against bypass apps like Hestia?

These are the methods I have used so far:

 private func checkCydia() -> Bool {
    return UIApplication.shared.canOpenURL(URL(string: "cydia://package/com.example.package")!)
}

private func isFridaDetected() -> Bool {
    let fridaLibs = ["frida-gadget", "libfrida.dylib"]

    for lib in fridaLibs {
        if dlopen(lib, RTLD_NOW | RTLD_NOLOAD) != nil {
            // Frida library detected
            return true
        }
    }

    // Check all loaded libraries
    let count = _dyld_image_count()
    for i in 0..<count {
        if let dyld = _dyld_get_image_name(i) {
            let dyldStr = String(cString: dyld)
            if dyldStr.contains("frida") || dyldStr.contains("libfrida") {
                // Frida-related library detected
                return true
            }
        }
    }

    // Frida not detected
    return false
}

private func checkSuspiciousPaths() -> Bool {
    let paths = [
        "/Applications/Cydia.app",
        "/Library/MobileSubstrate/MobileSubstrate.dylib",
        "/bin/bash",
        "/usr/sbin/sshd",
        "/etc/apt",
        "/usr/bin/ssh",
        "/private/var/lib/apt/",
        "/private/var/stash"
    ]

    for path in paths {
        if FileManager.default.fileExists(atPath: path) {
            return true
        }
    }
    return false
}

private func canOpenSuspiciousApps() -> Bool {
    let paths = [
        "/Applications/Cydia.app",
        "/Applications/blackra1n.app",
        "/Applications/FakeCarrier.app",
        "/Applications/Icy.app",
        "/Applications/IntelliScreen.app",
        "/Applications/MxTube.app",
        "/Applications/RockApp.app",
        "/Applications/SBSettings.app",
        "/Applications/WinterBoard.app",
        "/Applications/LibertyLite.app",  // Liberty Lite
        "/Applications/PicaHide.app",     // PicaHide
        "/Applications/KernBypass.app",   // KernBypass
        "/Applications/JailProtect.app",  // Jailprotect
        "/Applications/Shadow.app",       // Shadow
        "/Applications/TweaksManager.app", // Tweaks Manager
        "/Applications/TsProtector.app",  // TsProtector
        "/Applications/FlyJB.app",        // FlyJB X
        "/Applications/VnodeBypass.app",  // VnodeBypass
        "/Applications/AJB.app",          // AJB
        "/Applications/xCon.app",         // xCon
        "/Applications/DeBypass.app",     // De-Bypass
        "/Applications/Hestia.app"        // Hestia
    ]

    for path in paths {
        if FileManager.default.fileExists(atPath: path) {
            return true
        }
    }
    return false
}

private func checkEnvironment() -> Bool {
    return getenv("DYLD_INSERT_LIBRARIES") != nil
}

// New function to check paths using stat64/stat
private func checkStatPaths() -> Bool {
    let suspiciousPaths = [
        "/Applications/blackra1n.app",
        "/Applications/Cydia.app",
        "/Applications/FakeCarrier.app",
        "/Applications/Icy.app",
        "/Applications/IntelliScreen.app",
        "/Applications/MxTube.app",
        "/Applications/RockApp.app",
        "/Applications/SBSettings.app",
        "/Applications/WinterBoard.app",
        "/bin/bash",
        "/bin/sh",
        "/bin/su",
        "/etc/apt",
        "/etc/ssh/sshd_config",
        "/Library/MobileSubstrate/DynamicLibraries/LiveClock.plist",
        "/Library/MobileSubstrate/DynamicLibraries/Veency.plist",
        "/Library/MobileSubstrate/MobileSubstrate.dylib",
        "/pguntether",
        "/private/var/lib/cydia",
        "/private/var/mobile/Library/SBSettings/Themes",
        "/private/var/stash",
        "/private/var/tmp/cydia.log",
        "/System/Library/LaunchDaemons/com.ikey.bbot.plist",
        "/System/Library/LaunchDaemons/com.saurik.Cydia.Startup.plist",
        "/usr/bin/cycript",
        "/usr/bin/ssh",
        "/usr/bin/sshd",
        "/usr/libexec/sftp-server",
        "/usr/libexec/ssh-keysign",
        "/usr/sbin/frida-server",
        "/usr/sbin/sshd",
        "/var/cache/apt",
        "/var/lib/cydia",
        "/var/log/syslog",
        "/var/mobile/Media/.evasi0n7_installed",
        "/var/tmp/cydia.log"
    ]

    for path in suspiciousPaths {
        if checkStat(path) {
            return true
        }
    }
    return false
}