### Parse and Display Instructions

Source: https://context7.com/apkunpacker/anti-frida/llms.txt

Parses and displays a specified number of native instructions starting from a given memory address. Useful for inspecting code before and after instrumentation.

```javascript
function Ins(nativePtr, instructionCount) {
    var instructionArr = [];
    for (var i = 0; i < instructionCount; i++) {
        var dissAsm = Instruction.parse(nativePtr);
        console.log(dissAsm);
        nativePtr = dissAsm.next;
    }
}

// Get address of libc 'open' function
var Addr = Module.findExportByName("libc.so", "open");

// Parse first 3 instructions
Ins(Addr, 3);
```

--------------------------------

### Demonstrate Interceptor Attach and Instruction Changes

Source: https://context7.com/apkunpacker/anti-frida/llms.txt

Shows how Frida's Interceptor.attach modifies function instructions by hooking the 'open' system call. It logs file paths and then parses instructions to reveal the trampoline modifications made by Frida.

```javascript
var Addr = Module.findExportByName("libc.so", "open");

// Instruction parser function
function Ins(nativePtr, instructionCount) {
    var instructionArr = [];
    for (var i = 0; i < instructionCount; i++) {
        var dissAsm = Instruction.parse(nativePtr);
        console.log(dissAsm);
        nativePtr = dissAsm.next;
    }
}

// Attach interceptor to 'open' function
Interceptor.attach(Module.findExportByName("libc.so", "open"), function (args) {
    console.warn(args[0].readCString());
});

// Parse instructions AFTER attaching hook
// This reveals Frida's trampoline modifications
Ins(Addr, 3);
```

--------------------------------

### Parse Instructions After Frida Hook (JavaScript)

Source: https://github.com/apkunpacker/anti-frida/blob/main/README.md

Attaches a Frida interceptor to the 'open' function in libc.so and then parses its instructions. The output shows modified instructions due to Frida's trampoline.

```javascript
var Addr = Module.findExportByName("libc.so","open");
function Ins(nativePtr, instructionCount) {
    var instructionArr = [];
    for (var i = 0; i < instructionCount; i++) {
        var dissAsm = Instruction.parse(nativePtr);
        console.log(dissAsm);
        nativePtr = dissAsm.next;
    }
}
Interceptor.attach(Module.findExportByName("libc.so","open"), function (args) {
          console.warn(args[0].readCString());
})

Ins(Addr,3);
```

--------------------------------

### Parse Instructions of a Function (JavaScript)

Source: https://github.com/apkunpacker/anti-frida/blob/main/README.md

Parses and prints a specified number of instructions from a given native pointer. This is used to inspect the original state of a function before any hooking.

```javascript
var Addr = Module.findExportByName("libc.so","open");
Ins(Addr,3);
function Ins(nativePtr, instructionCount) {
    var instructionArr = [];
    for (var i = 0; i < instructionCount; i++) {
        var dissAsm = Instruction.parse(nativePtr);
        console.log(dissAsm);
        nativePtr = dissAsm.next;
    }
}
```

--------------------------------

### Detect Frida Hook on libc.so Functions (JavaScript)

Source: https://github.com/apkunpacker/anti-frida/blob/main/README.md

Checks for Frida's presence by parsing the first few instructions of critical libc.so functions ('open', 'access', 'stat', 'syscall') and looking for specific instruction patterns indicative of a hook. Displays a toast message if a hook is detected.

```javascript
var open = Module.findExportByName("libc.so", 'open');
var access = Module.findExportByName("libc.so", 'access');
var stat = Module.findExportByName("libc.so", 'stat');
var syscall = Module.findExportByName("libc.so", 'syscall');
var O = Instruction.parse(open);
var A = Instruction.parse(access);
var S = Instruction.parse(stat)
var SC = Instruction.parse(syscall);
if(O.toString().indexOf("sub sp")<0) {
  hook("Detected Hook On Libc.so Open");
}
if(A.toString().indexOf("mov r2")<0) {
  hook("Detected Hook On Libc.so Access");
}
if(S.toString().indexOf("mov r2")<0) {
  hook("Detected Hook On Libc.so Stat");
}
if(SC.toString().indexOf("mov ip")<0) {
  hook("Detected Hook On Libc.so Syscall");
}
function hook(input) {
    if (Java.available) {
    Java.perform(function() {
        var context = Java.use('android.app.ActivityThread').currentApplication().getApplicationContext();
        Java.scheduleOnMainThread(function() {
            var toast = Java.use("android.widget.Toast");
            toast.makeText(Java.use("android.app.ActivityThread").currentApplication().getApplicationContext(), Java.use("java.lang.String").$new(input), 1).show();
        });
    });                        
  }
}
```

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