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Frida Cheatsheet
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//Executing Frida and loading script | |
//frida -U --no-pause -l disableRoot.js -f sg.vantagepoint.uncrackable1 | |
//Overwriting a function and getting a return value | |
aes_decrypt.a.overload("[B","[B").implementation = function(var_0,var_1) { | |
send("sg.vantagepoint.a.a.a([B[B)[B doFinal(enc) // AES/ECB/PKCS7Padding"); | |
send("Key : " + var_0); | |
send("Encrypted : " + var_1); | |
var ret = this.a.overload("[B","[B").call(this,var_0,var_1); | |
send("Decrypted : " + ret); | |
flag = ""; | |
for (var i=0; i < ret.length; i++){ | |
flag += String.fromCharCode(ret[i]); | |
} | |
send("Decrypted flag: " + flag); | |
return ret; //[B | |
}; | |
//Hook a native function and print out it's params | |
//Hook Library loading | |
Java.perform(function() { | |
const System = Java.use('java.lang.System'); | |
const Runtime = Java.use('java.lang.Runtime'); | |
const VMStack = Java.use('dalvik.system.VMStack'); | |
System.loadLibrary.implementation = function(library) { | |
try { | |
console.log('System.loadLibrary("' + library + '")'); | |
const loaded = Runtime.getRuntime().loadLibrary0(VMStack.getCallingClassLoader(), library); | |
return loaded; | |
} catch(ex) { | |
console.log(ex); | |
} | |
}; | |
System.load.implementation = function(library) { | |
try { | |
console.log('System.load("' + library + '")'); | |
const loaded = Runtime.getRuntime().load0(VMStack.getCallingClassLoader(), library); | |
return loaded; | |
} catch(ex) { | |
console.log(ex); | |
} | |
}; | |
}); |
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