# Frida

## Attacher un script

```bash
frida -U -l script.js app-name
```

## Attacher un script au lancement  de l'application avec frida-trace avec l'argument -f

```bash
frida-trace -U -m "*[* *ailbr*]" -f Identifier_app
```

## Script changer une valeur 

```javascript
var targetModule = 'app_name';
var addr = ptr(offset);
var moduleBase = Module.getBaseAddress(targetModule);
var targetAddress = moduleBase.add(addr);
   Interceptor.attach(targetAddress, {
        onEnter: function(args) {
                   console.log('Adresse de x0 ' + addr + 'Valeur  : ' + this.context.name_var);
        },
    });
```

## Script changer valeur retour

```javascript
var targetModule = 'app_name';
var addr = ptr(offset);
var moduleBase = Module.getBaseAddress(targetModule);
var targetAddress = moduleBase.add(addr);
   Interceptor.attach(targetAddress, {
        onLeave: function(retval) {
		   console.log("Valeur retourne par la methode isJailbreak : "+retval);
	           retval.replace(value);
        },
    });
```

## Script qui Hook une native Fonction et qui renvoie sa Backtrace

```javascript
Interceptor.attach(Module.findExportByName(null, "fopen"), {
    onEnter: function(args) {
	console.log("+++++++++++++++Interception de la fonction fopen+++++++++++++\n");
	//console.log(args[0].readCString());
       var backtrace= Thread.backtrace(this.context, Backtracer.ACCURATE).map(DebugSymbol.fromAddress).join('\n'); 
       console.log(backtrace);
    
    },
    //onLeave: function(args) {
	//console.log("+++++++Interception de la fonction fopen++++++++++++");
        //console.log("Interceptor attached onLeave...");
   // }
});

```

## Script qui hook une méthode Objective C

```javascript
var Classe = ObjC.classes.Classe;
Interceptor.attach(Classe['- method_de_classe'].implementation,{
	onEnter:function(args){
		//console.log("Interception Classe);
	}

});
```


---

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