# frida_detection_system.py - Frida 检测系统
import os
import psutil
import hashlib
import time
import threading
from pathlib import Path

class FridaDetectionSystem:
    def __init__(self):
        self.detection_methods = []
        self.is_monitoring = False
        self.detection_results = []
        self.callbacks = []
        
        # 初始化检测方法
        self.init_detection_methods()
    
    def init_detection_methods(self):
        """初始化所有检测方法"""
        self.detection_methods = [
            self.detect_frida_processes,
            self.detect_frida_files,
            self.detect_frida_ports,
            self.detect_frida_libraries,
            self.detect_frida_memory_patterns,
            self.detect_frida_environment,
            self.detect_frida_behavior
        ]
    
    def detect_frida_processes(self):
        """检测 Frida 相关进程"""
        frida_processes = []
        frida_keywords = [
            'frida', 'frida-server', 'frida-agent', 'gum-js-loop',
            'gmain', 'gdbus', 'frida-helper'
        ]
        
        try:
            for proc in psutil.process_iter(['pid', 'name', 'cmdline']):
                try:
                    proc_info = proc.info
                    proc_name = proc_info['name'].lower()
                    cmdline = ' '.join(proc_info['cmdline'] or []).lower()
                    
                    # 检查进程名
                    for keyword in frida_keywords:
                        if keyword in proc_name or keyword in cmdline:
                            frida_processes.append({
                                'pid': proc_info['pid'],
                                'name': proc_info['name'],
                                'cmdline': proc_info['cmdline'],
                                'detection_type': 'process_name'
                            })
                            break
                    
                    # 检查可疑的端口监听
                    try:
                        connections = proc.connections()
                        for conn in connections:
                            if conn.status == 'LISTEN' and conn.laddr.port == 27042:
                                frida_processes.append({
                                    'pid': proc_info['pid'],
                                    'name': proc_info['name'],
                                    'port': conn.laddr.port,
                                    'detection_type': 'frida_port'
                                })
                    except:
                        pass
                        
                except (psutil.NoSuchProcess, psutil.AccessDenied):
                    continue
        
        except Exception as e:
            print(f"Process detection error: {e}")
        
        return {
            'method': 'process_detection',
            'detected': len(frida_processes) > 0,
            'details': frida_processes
        }
    
    def detect_frida_files(self):
        """检测 Frida 相关文件"""
        frida_files = []
        
        # 常见的 Frida 文件路径
        frida_paths = [
            '/data/local/tmp/frida-server',
            '/data/local/tmp/frida-agent',
            '/system/bin/frida-server',
            '/system/xbin/frida-server',
            '/vendor/bin/frida-server',
            '/data/local/tmp/re.frida.server',
            '/data/local/tmp/frida-inject'
        ]
        
        # 检查文件是否存在
        for path in frida_paths:
            if os.path.exists(path):
                try:
                    stat_info = os.stat(path)
                    with open(path, 'rb') as f:
                        file_hash = hashlib.md5(f.read()).hexdigest()
                    
                    frida_files.append({
                        'path': path,
                        'size': stat_info.st_size,
                        'hash': file_hash,
                        'mtime': stat_info.st_mtime
                    })
                except Exception as e:
                    frida_files.append({
                        'path': path,
                        'error': str(e)
                    })
        
        # 检查临时目录中的可疑文件
        temp_dirs = ['/tmp', '/data/local/tmp', '/sdcard/tmp']
        for temp_dir in temp_dirs:
            if os.path.exists(temp_dir):
                try:
                    for file_path in Path(temp_dir).rglob('*'):
                        if file_path.is_file():
                            filename = file_path.name.lower()
                            if any(keyword in filename for keyword in ['frida', 'gum', 'gadget']):
                                frida_files.append({
                                    'path': str(file_path),
                                    'detection_type': 'suspicious_filename'
                                })
                except Exception:
                    pass
        
        return {
            'method': 'file_detection',
            'detected': len(frida_files) > 0,
            'details': frida_files
        }
    
    def detect_frida_ports(self):
        """检测 Frida 默认端口"""
        frida_ports = [27042, 27043, 27044, 27045]  # Frida 常用端口
        open_frida_ports = []
        
        try:
            # 检查网络连接
            connections = psutil.net_connections()
            for conn in connections:
                if conn.status == 'LISTEN' and conn.laddr.port in frida_ports:
                    open_frida_ports.append({
                        'port': conn.laddr.port,
                        'address': conn.laddr.ip,
                        'pid': conn.pid
                    })
        
        except Exception as e:
            print(f"Port detection error: {e}")
        
        return {
            'method': 'port_detection',
            'detected': len(open_frida_ports) > 0,
            'details': open_frida_ports
        }
    
    def detect_frida_libraries(self):
        """检测 Frida 相关库文件"""
        frida_libraries = []
        current_pid = os.getpid()
        
        try:
            proc = psutil.Process(current_pid)
            memory_maps = proc.memory_maps()
            
            frida_lib_patterns = [
                'frida', 'gum', 'gadget', 'agent', 'libfrida'
            ]
            
            for mmap in memory_maps:
                path = mmap.path.lower()
                for pattern in frida_lib_patterns:
                    if pattern in path:
                        frida_libraries.append({
                            'path': mmap.path,
                            'size': mmap.size if hasattr(mmap, 'size') else 0,
                            'permissions': mmap.perms if hasattr(mmap, 'perms') else 'unknown'
                        })
                        break
        
        except Exception as e:
            print(f"Library detection error: {e}")
        
        return {
            'method': 'library_detection',
            'detected': len(frida_libraries) > 0,
            'details': frida_libraries
        }
    
    def detect_frida_memory_patterns(self):
        """检测内存中的 Frida 特征"""
        # 这个方法在 Python 中实现有限，主要用于演示
        # 实际应用中需要在目标应用内部实现
        
        frida_signatures = [
            b'frida',
            b'gum-js-loop',
            b'_frida_agent_main',
            b'frida_agent_main',
            b'GumScript'
        ]
        
        detected_patterns = []
        
        try:
            # 检查当前进程的内存映射
            current_pid = os.getpid()
            proc = psutil.Process(current_pid)
            
            # 这里只是示例，实际内存扫描需要更底层的实现
            for mmap in proc.memory_maps():
                if 'heap' in mmap.path.lower() or 'stack' in mmap.path.lower():
                    detected_patterns.append({
                        'type': 'memory_region',
                        'path': mmap.path,
                        'note': 'Requires deeper memory analysis'
                    })
                    break  # 只检查一个示例
        
        except Exception as e:
            print(f"Memory pattern detection error: {e}")
        
        return {
            'method': 'memory_pattern_detection',
            'detected': len(detected_patterns) > 0,
            'details': detected_patterns
        }
    
    def detect_frida_environment(self):
        """检测 Frida 环境变量和系统特征"""
        frida_indicators = []
        
        # 检查环境变量
        frida_env_vars = [
            'FRIDA_AGENT_PATH',
            'FRIDA_GADGET_PATH',
            'FRIDA_SERVER_PATH'
        ]
        
        for env_var in frida_env_vars:
            if env_var in os.environ:
                frida_indicators.append({
                    'type': 'environment_variable',
                    'name': env_var,
                    'value': os.environ[env_var]
                })
        
        # 检查系统属性（Android 特有）
        try:
            # 模拟检查系统属性
            suspicious_props = [
                'ro.debuggable',
                'ro.secure',
                'service.adb.root'
            ]
            
            for prop in suspicious_props:
                # 在实际 Android 环境中，这里会调用 getprop
                frida_indicators.append({
                    'type': 'system_property',
                    'name': prop,
                    'note': 'Requires Android environment to check'
                })
        
        except Exception as e:
            print(f"Environment detection error: {e}")
        
        return {
            'method': 'environment_detection',
            'detected': len(frida_indicators) > 0,
            'details': frida_indicators
        }
    
    def detect_frida_behavior(self):
        """检测 Frida 行为特征"""
        behavioral_indicators = []
        
        try:
            # 检查可疑的网络活动
            connections = psutil.net_connections()
            for conn in connections:
                # 检查到 Frida 服务器的连接
                if (conn.raddr and 
                    conn.raddr.port in [27042, 27043, 27044, 27045]):
                    behavioral_indicators.append({
                        'type': 'network_connection',
                        'remote_port': conn.raddr.port,
                        'local_port': conn.laddr.port,
                        'status': conn.status
                    })
            
            # 检查异常的系统调用模式
            # 这里只是示例，实际需要更复杂的行为分析
            current_proc = psutil.Process()
            cpu_percent = current_proc.cpu_percent(interval=1)
            
            if cpu_percent > 50:  # 高 CPU 使用率可能表示调试活动
                behavioral_indicators.append({
                    'type': 'high_cpu_usage',
                    'cpu_percent': cpu_percent,
                    'note': 'May indicate debugging activity'
                })
        
        except Exception as e:
            print(f"Behavior detection error: {e}")
        
        return {
            'method': 'behavior_detection',
            'detected': len(behavioral_indicators) > 0,
            'details': behavioral_indicators
        }
    
    def run_detection(self):
        """运行所有检测方法"""
        results = []
        
        print("[FridaDetection] Starting comprehensive Frida detection...")
        
        for method in self.detection_methods:
            try:
                result = method()
                results.append(result)
                
                if result['detected']:
                    print(f"[DETECTED] {result['method']}: {len(result['details'])} indicators found")
                else:
                    print(f"[CLEAN] {result['method']}: No indicators found")
                    
            except Exception as e:
                print(f"[ERROR] {method.__name__}: {e}")
                results.append({
                    'method': method.__name__,
                    'detected': False,
                    'error': str(e)
                })
        
        return results
    
    def start_continuous_monitoring(self, interval=30):
        """启动连续监控"""
        if self.is_monitoring:
            print("[FridaDetection] Already monitoring")
            return
        
        self.is_monitoring = True
        
        def monitor_loop():
            while self.is_monitoring:
                results = self.run_detection()
                
                # 检查是否有新的检测结果
                detected_methods = [r['method'] for r in results if r['detected']]
                if detected_methods:
                    self.trigger_callbacks(results)
                
                time.sleep(interval)
        
        self.monitor_thread = threading.Thread(target=monitor_loop, daemon=True)
        self.monitor_thread.start()
        
        print(f"[FridaDetection] Started continuous monitoring (interval: {interval}s)")
    
    def stop_monitoring(self):
        """停止监控"""
        self.is_monitoring = False
        print("[FridaDetection] Stopped monitoring")
    
    def add_detection_callback(self, callback):
        """添加检测回调"""
        self.callbacks.append(callback)
    
    def trigger_callbacks(self, results):
        """触发检测回调"""
        for callback in self.callbacks:
            try:
                callback(results)
            except Exception as e:
                print(f"Callback error: {e}")
    
    def generate_report(self, results):
        """生成检测报告"""
        report = {
            'timestamp': time.time(),
            'total_methods': len(results),
            'detected_methods': len([r for r in results if r['detected']]),
            'detection_rate': 0,
            'results': results
        }
        
        if report['total_methods'] > 0:
            report['detection_rate'] = report['detected_methods'] / report['total_methods']
        
        return report

# Android 应用内检测脚本
def get_android_detection_script():
    """获取 Android 应用内的 Frida 检测脚本"""
    return """
    Java.perform(function() {
        console.log("[AntiDebug] Starting Frida detection in Android app");
        
        // 1. 检测 Frida 类和方法
        detectFridaClasses();
        
        // 2. 检测异常的 ClassLoader
        detectAbnormalClassLoader();
        
        // 3. 检测 Hook 痕迹
        detectHookTraces();
        
        // 4. 检测调试器
        detectDebugger();
        
        // 5. 检测模拟器环境
        detectEmulator();
    });
    
    function detectFridaClasses() {
        try {
            // 尝试加载 Frida 相关类
            var fridaClasses = [
                "re.frida.Gadget",
                "com.android.internal.os.ZygoteInit",
                "de.robv.android.xposed.XposedBridge"
            ];
            
            fridaClasses.forEach(function(className) {
                try {
                    Java.use(className);
                    send({
                        type: 'detection',
                        method: 'frida_class_detection',
                        detected: true,
                        details: 'Found Frida class: ' + className
                    });
                } catch (e) {
                    // 类不存在，正常情况
                }
            });
            
            // 检查当前 ClassLoader
            var currentClassLoader = Java.vm.tryGetEnv().getClassLoader();
            var classLoaderName = currentClassLoader.getClass().getName();
            
            if (classLoaderName.indexOf("frida") !== -1 || 
                classLoaderName.indexOf("gadget") !== -1) {
                send({
                    type: 'detection',
                    method: 'classloader_detection',
                    detected: true,
                    details: 'Suspicious ClassLoader: ' + classLoaderName
                });
            }
            
        } catch (e) {
            console.log("[-] Frida class detection error: " + e);
        }
    }
    
    function detectAbnormalClassLoader() {
        try {
            var Thread = Java.use("java.lang.Thread");
            var currentThread = Thread.currentThread();
            var contextClassLoader = currentThread.getContextClassLoader();
            
            if (contextClassLoader) {
                var loaderClass = contextClassLoader.getClass().getName();
                
                // 检查可疑的 ClassLoader
                var suspiciousLoaders = [
                    "dalvik.system.InMemoryDexClassLoader",
                    "dalvik.system.BaseDexClassLoader"
                ];
                
                suspiciousLoaders.forEach(function(suspiciousLoader) {
                    if (loaderClass.indexOf(suspiciousLoader) !== -1) {
                        send({
                            type: 'detection',
                            method: 'abnormal_classloader',
                            detected: true,
                            details: 'Found suspicious ClassLoader: ' + loaderClass
                        });
                    }
                });
            }
            
        } catch (e) {
            console.log("[-] ClassLoader detection error: " + e);
        }
    }
    
    function detectHookTraces() {
        try {
            // 检查方法是否被 Hook
            var String = Java.use("java.lang.String");
            var originalEquals = String.equals;
            
            // 尝试检测方法是否被修改
            if (originalEquals.implementation !== originalEquals) {
                send({
                    type: 'detection',
                    method: 'hook_trace_detection',
                    detected: true,
                    details: 'String.equals method appears to be hooked'
                });
            }
            
            // 检查堆栈跟踪中的 Frida 痕迹
            try {
                throw new Error("Stack trace check");
            } catch (e) {
                var stackTrace = e.stack;
                if (stackTrace.indexOf("frida") !== -1 || 
                    stackTrace.indexOf("gum") !== -1) {
                    send({
                        type: 'detection',
                        method: 'stack_trace_detection',
                        detected: true,
                        details: 'Frida traces found in stack trace'
                    });
                }
            }
            
        } catch (e) {
            console.log("[-] Hook trace detection error: " + e);
        }
    }
    
    function detectDebugger() {
        try {
            var Debug = Java.use("android.os.Debug");
            
            // 检查调试器连接
            var isDebuggerConnected = Debug.isDebuggerConnected();
            if (isDebuggerConnected) {
                send({
                    type: 'detection',
                    method: 'debugger_detection',
                    detected: true,
                    details: 'Debugger is connected'
                });
            }
            
            // 检查等待调试器
            var waitingForDebugger = Debug.waitingForDebugger();
            if (waitingForDebugger) {
                send({
                    type: 'detection',
                    method: 'debugger_detection',
                    detected: true,
                    details: 'Waiting for debugger'
                });
            }
            
        } catch (e) {
            console.log("[-] Debugger detection error: " + e);
        }
    }
    
    function detectEmulator() {
        try {
            var Build = Java.use("android.os.Build");
            
            // 检查模拟器特征
            var emulatorIndicators = [
                { field: "BOARD", patterns: ["goldfish", "ranchu", "sdk"] },
                { field: "BOOTLOADER", patterns: ["unknown"] },
                { field: "BRAND", patterns: ["generic", "google"] },
                { field: "DEVICE", patterns: ["generic", "goldfish", "ranchu"] },
                { field: "HARDWARE", patterns: ["goldfish", "ranchu"] },
                { field: "MODEL", patterns: ["sdk", "emulator", "Android SDK"] },
                { field: "PRODUCT", patterns: ["sdk", "google_sdk", "sdk_google"] }
            ];
            
            emulatorIndicators.forEach(function(indicator) {
                try {
                    var fieldValue = Build[indicator.field].value.toLowerCase();
                    
                    indicator.patterns.forEach(function(pattern) {
                        if (fieldValue.indexOf(pattern) !== -1) {
                            send({
                                type: 'detection',
                                method: 'emulator_detection',
                                detected: true,
                                details: 'Emulator indicator: ' + indicator.field + ' = ' + fieldValue
                            });
                        }
                    });
                } catch (e) {
                    // 字段不存在或无法访问
                }
            });
            
        } catch (e) {
            console.log("[-] Emulator detection error: " + e);
        }
    }
    """

# 使用示例
def main():
    # 创建检测系统
    detector = FridaDetectionSystem()
    
    # 添加检测回调
    def on_frida_detected(results):
        print("\n[ALERT] Frida detected!")
        for result in results:
            if result['detected']:
                print(f"Method: {result['method']}")
                print(f"Details: {result['details']}")
    
    detector.add_detection_callback(on_frida_detected)
    
    # 运行一次性检测
    print("Running one-time detection...")
    results = detector.run_detection()
    
    # 生成报告
    report = detector.generate_report(results)
    print(f"\nDetection Report:")
    print(f"Detection Rate: {report['detection_rate']:.2%}")
    print(f"Methods Detected: {report['detected_methods']}/{report['total_methods']}")
    
    # 启动连续监控
    print("\nStarting continuous monitoring...")
    detector.start_continuous_monitoring(interval=10)
    
    try:
        # 保持监控运行
        time.sleep(60)
    except KeyboardInterrupt:
        print("\nStopping monitoring...")
    finally:
        detector.stop_monitoring()

if __name__ == "__main__":
    main()

// anti_frida_protection.js - 反 Frida 防护脚本
Java.perform(function() {
    console.log("[AntiDebug] Loading anti-Frida protection");
    
    // 1. 实现多层检测
    implementMultiLayerDetection();
    
    // 2. 代码混淆和反调试
    implementCodeObfuscation();
    
    // 3. 完整性检查
    implementIntegrityChecks();
    
    // 4. 环境检测
    implementEnvironmentChecks();
    
    // 5. 动态防护
    implementDynamicProtection();
});

function implementMultiLayerDetection() {
    try {
        // 检测 1: 检查异常的类加载器
        checkAbnormalClassLoaders();
        
        // 检测 2: 检查方法 Hook 痕迹
        checkMethodHookTraces();
        
        // 检测 3: 检查内存中的 Frida 特征
        checkMemorySignatures();
        
        // 检测 4: 检查网络连接
        checkNetworkConnections();
        
        // 检测 5: 检查文件系统
        checkFileSystem();
        
    } catch (e) {
        console.log("[-] Multi-layer detection error: " + e);
    }
}

function checkAbnormalClassLoaders() {
    try {
        var Thread = Java.use("java.lang.Thread");
        var ClassLoader = Java.use("java.lang.ClassLoader");
        
        // 检查当前线程的 ClassLoader
        var currentThread = Thread.currentThread();
        var contextClassLoader = currentThread.getContextClassLoader();
        
        if (contextClassLoader) {
            var loaderClassName = contextClassLoader.getClass().getName();
            
            // 检查可疑的 ClassLoader 类型
            var suspiciousLoaders = [
                "dalvik.system.InMemoryDexClassLoader",
                "java.net.URLClassLoader",
                "dalvik.system.DexClassLoader"
            ];
            
            if (suspiciousLoaders.some(loader => loaderClassName.includes(loader))) {
                triggerAntiDebugResponse("Suspicious ClassLoader detected: " + loaderClassName);
            }
        }
        
        // Hook ClassLoader.loadClass 来检测动态加载
        ClassLoader.loadClass.overload('java.lang.String').implementation = function(name) {
            if (name.includes("frida") || name.includes("gum") || name.includes("gadget")) {
                triggerAntiDebugResponse("Attempt to load Frida class: " + name);
                throw new Error("Class loading blocked");
            }
            
            return this.loadClass(name);
        };
        
    } catch (e) {
        console.log("[-] ClassLoader check error: " + e);
    }
}

function checkMethodHookTraces() {
    try {
        // 创建一个测试方法来检查是否被 Hook
        var TestClass = Java.registerClass({
            name: 'com.antifrida.TestClass',
            methods: {
                testMethod: {
                    returnType: 'java.lang.String',
                    argumentTypes: [],
                    implementation: function() {
                        return "original_result";
                    }
                }
            }
        });
        
        var testInstance = TestClass.$new();
        
        // 定期检查方法是否返回预期结果
        setInterval(function() {
            var result = testInstance.testMethod();
            if (result !== "original_result") {
                triggerAntiDebugResponse("Test method hook detected");
            }
        }, 5000);
        
        // 检查关键系统方法
        checkSystemMethodIntegrity();
        
    } catch (e) {
        console.log("[-] Method hook trace check error: " + e);
    }
}

function checkSystemMethodIntegrity() {
    try {
        var String = Java.use("java.lang.String");
        var originalEquals = String.equals;
        
        // 创建一个已知的测试
        var testString1 = String.$new("test");
        var testString2 = String.$new("test");
        
        // 检查 equals 方法是否正常工作
        if (!testString1.equals(testString2)) {
            triggerAntiDebugResponse("String.equals method compromised");
        }
        
        // 检查方法是否被替换
        setTimeout(function() {
            if (String.equals !== originalEquals) {
                triggerAntiDebugResponse("String.equals method replaced");
            }
        }, 1000);
        
    } catch (e) {
        console.log("[-] System method integrity check error: " + e);
    }
}

function checkMemorySignatures() {
    try {
        // 检查内存中的 Frida 特征字符串
        var Runtime = Java.use("java.lang.Runtime");
        var runtime = Runtime.getRuntime();
        
        // 尝试检测内存中的 Frida 相关字符串
        // 这需要更底层的实现，这里只是示例
        
        // 检查系统属性
        var System = Java.use("java.lang.System");
        
        var suspiciousProps = [
            "frida.version",
            "frida.agent",
            "ro.debuggable"
        ];
        
        suspiciousProps.forEach(function(prop) {
            var value = System.getProperty(prop);
            if (value !== null) {
                triggerAntiDebugResponse("Suspicious system property: " + prop + " = " + value);
            }
        });
        
    } catch (e) {
        console.log("[-] Memory signature check error: " + e);
    }
}

function checkNetworkConnections() {
    try {
        // 检查是否有到 Frida 默认端口的连接
        var Socket = Java.use("java.net.Socket");
        
        // Hook Socket 构造函数来检测连接
        Socket.$init.overload('java.lang.String', 'int').implementation = function(host, port) {
            var fridaPorts = [27042, 27043, 27044, 27045];
            
            if (fridaPorts.includes(port)) {
                triggerAntiDebugResponse("Attempt to connect to Frida port: " + port);
                throw new Error("Connection blocked");
            }
            
            this.$init(host, port);
        };
        
    } catch (e) {
        console.log("[-] Network connection check error: " + e);
    }
}

function checkFileSystem() {
    try {
        var File = Java.use("java.io.File");
        
        // Hook File 构造函数来检测 Frida 文件访问
        File.$init.overload('java.lang.String').implementation = function(pathname) {
            var fridaPaths = [
                "/data/local/tmp/frida-server",
                "/data/local/tmp/frida-agent",
                "/system/bin/frida-server"
            ];
            
            if (fridaPaths.some(path => pathname.includes(path))) {
                triggerAntiDebugResponse("Attempt to access Frida file: " + pathname);
                throw new Error("File access blocked");
            }
            
            this.$init(pathname);
        };
        
    } catch (e) {
        console.log("[-] File system check error: " + e);
    }
}

function implementCodeObfuscation() {
    try {
        // 1. 字符串混淆
        obfuscateStrings();
        
        // 2. 控制流混淆
        obfuscateControlFlow();
        
        // 3. 反射调用混淆
        obfuscateReflectionCalls();
        
    } catch (e) {
        console.log("[-] Code obfuscation error: " + e);
    }
}

function obfuscateStrings() {
    // 字符串解密函数
    function decryptString(encrypted) {
        // 简单的 XOR 解密示例
        var key = 0xAA;
        var decrypted = "";
        
        for (var i = 0; i < encrypted.length; i++) {
            decrypted += String.fromCharCode(encrypted.charCodeAt(i) ^ key);
        }
        
        return decrypted;
    }
    
    // 使用加密字符串
    var encryptedFrida = "\u00c7\u00d8\u00c3\u00c4\u00c5"; // "frida" XOR 0xAA
    var fridaString = decryptString(encryptedFrida);
    
    // 检查是否包含 Frida 字符串
    if (fridaString === "frida") {
        // 执行检测逻辑
    }
}

function obfuscateControlFlow() {
    // 使用复杂的控制流来隐藏检测逻辑
    var checksum = 0;
    var steps = [1, 3, 7, 2, 5];
    
    for (var i = 0; i < steps.length; i++) {
        checksum += steps[i];
        
        if (checksum === 18) {
            // 隐藏的检测逻辑
            performHiddenDetection();
        }
    }
}

function obfuscateReflectionCalls() {
    try {
        // 使用反射来隐藏方法调用
        var Class = Java.use("java.lang.Class");
        var Method = Java.use("java.lang.reflect.Method");
        
        // 动态获取类和方法
        var debugClass = Class.forName("android.os.Debug");
        var isDebuggerConnectedMethod = debugClass.getMethod("isDebuggerConnected");
        
        var isConnected = isDebuggerConnectedMethod.invoke(null);
        if (isConnected) {
            triggerAntiDebugResponse("Debugger detected via reflection");
        }
        
    } catch (e) {
        console.log("[-] Reflection obfuscation error: " + e);
    }
}

function implementIntegrityChecks() {
    try {
        // 1. 代码完整性检查
        checkCodeIntegrity();
        
        // 2. 签名验证
        verifySignature();
        
        // 3. 校验和检查
        performChecksumValidation();
        
    } catch (e) {
        console.log("[-] Integrity check error: " + e);
    }
}

function checkCodeIntegrity() {
    try {
        // 检查关键方法的字节码
        var targetMethod = Java.use("com.example.app.MainActivity").onCreate;
        
        // 计算方法的简单校验和（示例）
        var methodString = targetMethod.toString();
        var checksum = 0;
        
        for (var i = 0; i < methodString.length; i++) {
            checksum += methodString.charCodeAt(i);
        }
        
        // 与预期校验和比较
        var expectedChecksum = 12345; // 预先计算的值
        if (checksum !== expectedChecksum) {
            triggerAntiDebugResponse("Code integrity check failed");
        }
        
    } catch (e) {
        console.log("[-] Code integrity check error: " + e);
    }
}

function verifySignature() {
    try {
        var Context = Java.use("android.content.Context");
        var PackageManager = Java.use("android.content.pm.PackageManager");
        
        // 获取应用上下文
        var currentApplication = Java.use("android.app.ActivityThread")
            .currentApplication();
        
        if (currentApplication) {
            var packageManager = currentApplication.getPackageManager();
            var packageName = currentApplication.getPackageName();
            
            // 获取签名信息
            var packageInfo = packageManager.getPackageInfo(
                packageName, 
                PackageManager.GET_SIGNATURES.value
            );
            
            var signatures = packageInfo.signatures;
            if (signatures && signatures.length > 0) {
                var signature = signatures[0];
                var signatureBytes = signature.toByteArray();
                
                // 计算签名哈希
                var MessageDigest = Java.use("java.security.MessageDigest");
                var md = MessageDigest.getInstance("SHA-256");
                var hash = md.digest(signatureBytes);
                
                // 与预期哈希比较
                var expectedHash = "expected_signature_hash";
                var actualHash = bytesToHex(hash);
                
                if (actualHash !== expectedHash) {
                    triggerAntiDebugResponse("Signature verification failed");
                }
            }
        }
        
    } catch (e) {
        console.log("[-] Signature verification error: " + e);
    }
}

function performChecksumValidation() {
    // 定期验证关键数据的校验和
    setInterval(function() {
        try {
            // 验证关键配置数据
            var configData = "critical_config_data";
            var checksum = calculateChecksum(configData);
            var expectedChecksum = 54321;
            
            if (checksum !== expectedChecksum) {
                triggerAntiDebugResponse("Configuration checksum mismatch");
            }
            
        } catch (e) {
            console.log("[-] Checksum validation error: " + e);
        }
    }, 10000);
}

function implementEnvironmentChecks() {
    try {
        // 1. 检查运行环境
        checkRunningEnvironment();
        
        // 2. 检查调试状态
        checkDebuggingState();
        
        // 3. 检查模拟器
        checkEmulatorEnvironment();
        
    } catch (e) {
        console.log("[-] Environment check error: " + e);
    }
}

function checkRunningEnvironment() {
    try {
        var Build = Java.use("android.os.Build");
        
        // 检查构建类型
        if (Build.TYPE.value === "eng" || Build.TYPE.value === "userdebug") {
            triggerAntiDebugResponse("Running on debug build");
        }
        
        // 检查标签
        if (Build.TAGS.value.includes("test-keys")) {
            triggerAntiDebugResponse("Running with test keys");
        }
        
    } catch (e) {
        console.log("[-] Environment check error: " + e);
    }
}

function checkDebuggingState() {
    try {
        var Debug = Java.use("android.os.Debug");
        
        // 定期检查调试状态
        setInterval(function() {
            if (Debug.isDebuggerConnected()) {
                triggerAntiDebugResponse("Debugger connected");
            }
            
            if (Debug.waitingForDebugger()) {
                triggerAntiDebugResponse("Waiting for debugger");
            }
        }, 3000);
        
    } catch (e) {
        console.log("[-] Debugging state check error: " + e);
    }
}

function checkEmulatorEnvironment() {
    try {
        var Build = Java.use("android.os.Build");
        
        var emulatorIndicators = [
            { field: "FINGERPRINT", patterns: ["generic", "unknown"] },
            { field: "MODEL", patterns: ["google_sdk", "Emulator", "Android SDK"] },
            { field: "MANUFACTURER", patterns: ["Genymotion", "unknown"] },
            { field: "BRAND", patterns: ["generic", "google"] }
        ];
        
        emulatorIndicators.forEach(function(indicator) {
            var fieldValue = Build[indicator.field].value.toLowerCase();
            
            indicator.patterns.forEach(function(pattern) {
                if (fieldValue.includes(pattern.toLowerCase())) {
                    triggerAntiDebugResponse("Emulator detected: " + indicator.field + " = " + fieldValue);
                }
            });
        });
        
    } catch (e) {
        console.log("[-] Emulator check error: " + e);
    }
}

function implementDynamicProtection() {
    try {
        // 1. 动态代码生成
        generateDynamicCode();
        
        // 2. 运行时多态
        implementRuntimePolymorphism();
        
        // 3. 自修改代码
        implementSelfModifyingCode();
        
    } catch (e) {
        console.log("[-] Dynamic protection error: " + e);
    }
}

function generateDynamicCode() {
    // 动态生成检测代码
    var detectionCode = function() {
        var timestamp = Date.now();
        var randomValue = Math.random();
        
        // 基于时间和随机数生成检测逻辑
        if ((timestamp + randomValue) % 2 < 1) {
            performRandomDetection();
        }
    };
    
    // 定期执行动态生成的代码
    setInterval(detectionCode, 7000);
}

function implementRuntimePolymorphism() {
    // 运行时改变检测方法的行为
    var detectionMethods = [
        function() { checkMethodHookTraces(); },
        function() { checkMemorySignatures(); },
        function() { checkNetworkConnections(); }
    ];
    
    setInterval(function() {
        var randomIndex = Math.floor(Math.random() * detectionMethods.length);
        detectionMethods[randomIndex]();
    }, 5000);
}

function implementSelfModifyingCode() {
    // 自修改代码示例（概念性）
    var modificationCounter = 0;
    
    function selfModifyingDetection() {
        modificationCounter++;
        
        // 根据调用次数改变行为
        if (modificationCounter % 3 === 0) {
            checkAbnormalClassLoaders();
        } else if (modificationCounter % 3 === 1) {
            checkMethodHookTraces();
        } else {
            checkMemorySignatures();
        }
    }
    
    setInterval(selfModifyingDetection, 8000);
}

// 反调试响应函数
function triggerAntiDebugResponse(reason) {
    console.log("[ANTI-DEBUG] Triggered: " + reason);
    
    // 响应策略
    var responses = [
        function() { 
            // 退出应用
            var System = Java.use("java.lang.System");
            System.exit(0);
        },
        function() {
            // 抛出异常
            throw new Error("Security violation detected");
        },
        function() {
            // 清除敏感数据
            clearSensitiveData();
        },
        function() {
            // 发送警报到服务器
            sendSecurityAlert(reason);
        }
    ];
    
    // 随机选择响应策略
    var randomResponse = responses[Math.floor(Math.random() * responses.length)];
    
    setTimeout(function() {
        try {
            randomResponse();
        } catch (e) {
            console.log("[-] Anti-debug response error: " + e);
        }
    }, Math.random() * 2000); // 随机延迟
}

// 辅助函数
function performHiddenDetection() {
    // 隐藏的检测逻辑
    try {
        var Thread = Java.use("java.lang.Thread");
        var currentThread = Thread.currentThread();
        var threadName = currentThread.getName();
        
        if (threadName.includes("frida") || threadName.includes("gum")) {
            triggerAntiDebugResponse("Frida thread detected: " + threadName);
        }
    } catch (e) {
        console.log("[-] Hidden detection error: " + e);
    }
}

function performRandomDetection() {
    var detections = [
        checkAbnormalClassLoaders,
        checkMethodHookTraces,
        checkMemorySignatures
    ];
    
    var randomDetection = detections[Math.floor(Math.random() * detections.length)];
    randomDetection();
}

function calculateChecksum(data) {
    var checksum = 0;
    for (var i = 0; i < data.length; i++) {
        checksum += data.charCodeAt(i);
    }
    return checksum;
}

function bytesToHex(bytes) {
    var hex = "";
    for (var i = 0; i < bytes.length; i++) {
        var byte = bytes[i] & 0xFF;
        hex += ("0" + byte.toString(16)).slice(-2);
    }
    return hex.toUpperCase();
}

function clearSensitiveData() {
    // 清除敏感数据的逻辑
    console.log("[Security] Clearing sensitive data");
}

function sendSecurityAlert(reason) {
    // 发送安全警报到服务器
    console.log("[Security] Sending alert: " + reason);
}